release 8.14

.github/workflows/all-ci.yml

@@ -10,18 +10,13 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v2
 
-      - name: build and install recent 64tass
-        run: |
-          sudo apt-get install -y make build-essential
-          git clone --depth=1 https://github.com/irmen/64tass
-          cd 64tass
-          make -j4
-          sudo make install
+      - name: Install 64tass
+        run: sudo apt-get update -y && sudo apt-get install -y 64tass
 
       - name: Set up JDK 11
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v2
         with:
           java-version: 11
           distribution: adopt

.gitignore

@@ -15,7 +15,6 @@ out/
 parser/**/*.interp
 parser/**/*.tokens
 parser/**/*.java
-compiler/src/prog8/buildversion/*
 *.py[cod]
 *.egg
 *.egg-info
@@ -30,8 +29,6 @@ parsetab.py
 compiler/lib/
 
 .gradle
-**/BuildVersion.kt
 /prog8compiler.jar
 sd*.img
 *.d64
-

.idea/kotlinc.xml

@@ -4,6 +4,6 @@
     <option name="jvmTarget" value="11" />
   </component>
   <component name="KotlinJpsPluginSettings">
-    <option name="version" value="1.9.0-release-358" />
+    <option name="version" value="1.8.21-release-380" />
   </component>
 </project>

.idea/libraries/antlr_antlr4.xml

@@ -1,13 +1,13 @@
 <component name="libraryTable">
   <library name="antlr.antlr4" type="repository">
-    <properties maven-id="org.antlr:antlr4:4.13.0">
+    <properties maven-id="org.antlr:antlr4:4.12.0">
       <exclude>
         <dependency maven-id="com.ibm.icu:icu4j" />
       </exclude>
     </properties>
     <CLASSES>
-      <root url="jar://$MAVEN_REPOSITORY$/org/antlr/antlr4/4.13.0/antlr4-4.13.0.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/antlr/antlr4-runtime/4.13.0/antlr4-runtime-4.13.0.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/antlr/antlr4/4.12.0/antlr4-4.12.0.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/antlr/antlr4-runtime/4.12.0/antlr4-runtime-4.12.0.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/org/antlr/antlr-runtime/3.5.3/antlr-runtime-3.5.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/org/antlr/ST4/4.3.4/ST4-4.3.4.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/org/abego/treelayout/org.abego.treelayout.core/1.0.3/org.abego.treelayout.core-1.0.3.jar!/" />

.idea/libraries/io_kotest_assertions_core_jvm.xml

@@ -1,21 +1,21 @@
 <component name="libraryTable">
   <library name="io.kotest.assertions.core.jvm" type="repository">
-    <properties maven-id="io.kotest:kotest-assertions-core-jvm:5.6.2" />
+    <properties maven-id="io.kotest:kotest-assertions-core-jvm:5.5.5" />
     <CLASSES>
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-core-jvm/5.6.2/kotest-assertions-core-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.8.10/kotlin-stdlib-jdk8-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib/1.8.10/kotlin-stdlib-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk7/1.8.10/kotlin-stdlib-jdk7-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-shared-jvm/5.6.2/kotest-assertions-shared-jvm-5.6.2.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-core-jvm/5.5.5/kotest-assertions-core-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.6.21/kotlin-stdlib-jdk8-1.6.21.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib/1.6.21/kotlin-stdlib-1.6.21.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/annotations/13.0/annotations-13.0.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk7/1.6.21/kotlin-stdlib-jdk7-1.6.21.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-shared-jvm/5.5.5/kotest-assertions-shared-jvm-5.5.5.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/github/java-diff-utils/java-diff-utils/4.12/java-diff-utils-4.12.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-common/1.8.10/kotlin-stdlib-common-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-jdk8/1.7.0/kotlinx-coroutines-jdk8-1.7.0.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-reflect/1.8.10/kotlin-reflect-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-common-jvm/5.6.2/kotest-common-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-api-jvm/5.6.2/kotest-assertions-api-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-core-jvm/1.7.0/kotlinx-coroutines-core-jvm-1.7.0.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/annotations/23.0.0/annotations-23.0.0.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-common/1.6.21/kotlin-stdlib-common-1.6.21.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-jdk8/1.6.4/kotlinx-coroutines-jdk8-1.6.4.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-reflect/1.6.21/kotlin-reflect-1.6.21.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-common-jvm/5.5.5/kotest-common-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-api-jvm/5.5.5/kotest-assertions-api-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-core-jvm/1.6.4/kotlinx-coroutines-core-jvm-1.6.4.jar!/" />
     </CLASSES>
     <JAVADOC />
     <SOURCES />

.idea/libraries/io_kotest_property_jvm.xml

@@ -1,22 +1,22 @@
 <component name="libraryTable">
   <library name="io.kotest.property.jvm" type="repository">
-    <properties maven-id="io.kotest:kotest-property-jvm:5.6.2" />
+    <properties maven-id="io.kotest:kotest-property-jvm:5.5.5" />
     <CLASSES>
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-property-jvm/5.6.2/kotest-property-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/com/github/curious-odd-man/rgxgen/1.4/rgxgen-1.4.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.8.10/kotlin-stdlib-jdk8-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib/1.8.10/kotlin-stdlib-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk7/1.8.10/kotlin-stdlib-jdk7-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-common-jvm/5.6.2/kotest-common-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-shared-jvm/5.6.2/kotest-assertions-shared-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-api-jvm/5.6.2/kotest-assertions-api-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-jdk8/1.7.0/kotlinx-coroutines-jdk8-1.7.0.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-property-jvm/5.5.5/kotest-property-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-common-jvm/5.5.5/kotest-common-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-shared-jvm/5.5.5/kotest-assertions-shared-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-api-jvm/5.5.5/kotest-assertions-api-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-jdk8/1.6.4/kotlinx-coroutines-jdk8-1.6.4.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-common/1.8.10/kotlin-stdlib-common-1.8.10.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-common/1.6.21/kotlin-stdlib-common-1.6.21.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/com/github/curious-odd-man/rgxgen/1.4/rgxgen-1.4.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.6.21/kotlin-stdlib-jdk8-1.6.21.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib/1.6.21/kotlin-stdlib-1.6.21.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/annotations/13.0/annotations-13.0.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk7/1.6.21/kotlin-stdlib-jdk7-1.6.21.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-reflect/1.6.21/kotlin-reflect-1.6.21.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-core-jvm/1.6.4/kotlinx-coroutines-core-jvm-1.6.4.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/github/java-diff-utils/java-diff-utils/4.12/java-diff-utils-4.12.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-reflect/1.8.10/kotlin-reflect-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-core-jvm/1.7.0/kotlinx-coroutines-core-jvm-1.7.0.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/annotations/23.0.0/annotations-23.0.0.jar!/" />
     </CLASSES>
     <JAVADOC />
     <SOURCES />

.idea/libraries/io_kotest_runner_junit5_jvm.xml

@@ -1,42 +1,55 @@
 <component name="libraryTable">
   <library name="io.kotest.runner.junit5.jvm" type="repository">
-    <properties maven-id="io.kotest:kotest-runner-junit5-jvm:5.6.2" />
+    <properties maven-id="io.kotest:kotest-runner-junit5-jvm:5.5.5" />
     <CLASSES>
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-runner-junit5-jvm/5.6.2/kotest-runner-junit5-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-framework-api-jvm/5.6.2/kotest-framework-api-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-shared-jvm/5.6.2/kotest-assertions-shared-jvm-5.6.2.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-runner-junit5-jvm/5.5.5/kotest-runner-junit5-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-framework-api-jvm/5.5.5/kotest-framework-api-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-test-jvm/1.6.4/kotlinx-coroutines-test-jvm-1.6.4.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-shared-jvm/5.5.5/kotest-assertions-shared-jvm-5.5.5.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/github/java-diff-utils/java-diff-utils/4.12/java-diff-utils-4.12.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-test-jvm/1.7.0/kotlinx-coroutines-test-jvm-1.7.0.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-common-jvm/5.6.2/kotest-common-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-framework-engine-jvm/5.6.2/kotest-framework-engine-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/github/classgraph/classgraph/4.8.157/classgraph-4.8.157.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-common/1.6.21/kotlin-stdlib-common-1.6.21.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-common-jvm/5.5.5/kotest-common-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-framework-engine-jvm/5.5.5/kotest-framework-engine-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/github/classgraph/classgraph/4.8.154/classgraph-4.8.154.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/com/github/ajalt/mordant/1.2.1/mordant-1.2.1.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/com/github/ajalt/colormath/1.2.0/colormath-1.2.0.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-debug/1.7.0/kotlinx-coroutines-debug-1.7.0.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-debug/1.6.4/kotlinx-coroutines-debug-1.6.4.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/net/java/dev/jna/jna/5.9.0/jna-5.9.0.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/net/java/dev/jna/jna-platform/5.9.0/jna-platform-5.9.0.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/net/bytebuddy/byte-buddy/1.10.9/byte-buddy-1.10.9.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/net/bytebuddy/byte-buddy-agent/1.10.9/byte-buddy-agent-1.10.9.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-framework-discovery-jvm/5.6.2/kotest-framework-discovery-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-core-jvm/5.6.2/kotest-assertions-core-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-jdk8/1.7.0/kotlinx-coroutines-jdk8-1.7.0.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-api-jvm/5.6.2/kotest-assertions-api-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-extensions-jvm/5.6.2/kotest-extensions-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-framework-concurrency-jvm/5.6.2/kotest-framework-concurrency-jvm-5.6.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-core-jvm/1.7.0/kotlinx-coroutines-core-jvm-1.7.0.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/annotations/23.0.0/annotations-23.0.0.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-engine/1.8.2/junit-platform-engine-1.8.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-commons/1.8.2/junit-platform-commons-1.8.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/apiguardian/apiguardian-api/1.1.2/apiguardian-api-1.1.2.jar!/" />
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-      <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-launcher/1.8.2/junit-platform-launcher-1.8.2.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-framework-discovery-jvm/5.5.5/kotest-framework-discovery-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-core-jvm/5.5.5/kotest-assertions-core-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-jdk8/1.6.4/kotlinx-coroutines-jdk8-1.6.4.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-assertions-api-jvm/5.5.5/kotest-assertions-api-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-extensions-jvm/5.5.5/kotest-extensions-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/mockk/mockk-jvm/1.13.1/mockk-jvm-1.13.1.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/mockk/mockk-dsl-jvm/1.13.1/mockk-dsl-jvm-1.13.1.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/mockk/mockk-agent-jvm/1.13.1/mockk-agent-jvm-1.13.1.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/objenesis/objenesis/3.2/objenesis-3.2.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/mockk/mockk-agent-api-jvm/1.13.1/mockk-agent-api-jvm-1.13.1.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/io/mockk/mockk-core-jvm/1.13.1/mockk-core-jvm-1.13.1.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/slf4j/slf4j-api/1.7.36/slf4j-api-1.7.36.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/junit/junit/4.13.2/junit-4.13.2.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter/5.8.2/junit-jupiter-5.8.2.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-params/5.8.2/junit-jupiter-params-5.8.2.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-engine/5.8.2/junit-jupiter-engine-5.8.2.jar!/" />
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+      <root url="jar://$MAVEN_REPOSITORY$/io/kotest/kotest-framework-concurrency-jvm/5.5.5/kotest-framework-concurrency-jvm-5.5.5.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-coroutines-core-jvm/1.6.4/kotlinx-coroutines-core-jvm-1.6.4.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-engine/1.7.2/junit-platform-engine-1.7.2.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/apiguardian/apiguardian-api/1.1.0/apiguardian-api-1.1.0.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-commons/1.7.2/junit-platform-commons-1.7.2.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-suite-api/1.7.2/junit-platform-suite-api-1.7.2.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-launcher/1.7.2/junit-platform-launcher-1.7.2.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-api/5.8.2/junit-jupiter-api-5.8.2.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.8.10/kotlin-stdlib-jdk8-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib/1.8.10/kotlin-stdlib-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk7/1.8.10/kotlin-stdlib-jdk7-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-common/1.8.10/kotlin-stdlib-common-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-reflect/1.8.10/kotlin-reflect-1.8.10.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.6.21/kotlin-stdlib-jdk8-1.6.21.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib/1.6.21/kotlin-stdlib-1.6.21.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/annotations/13.0/annotations-13.0.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk7/1.6.21/kotlin-stdlib-jdk7-1.6.21.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-reflect/1.6.21/kotlin-reflect-1.6.21.jar!/" />
     </CLASSES>
     <JAVADOC />
     <SOURCES />

.idea/libraries/michael_bull_kotlin_result_jvm.xml

@@ -1,13 +1,13 @@
 <component name="libraryTable">
   <library name="michael.bull.kotlin.result.jvm" type="repository">
-    <properties maven-id="com.michael-bull.kotlin-result:kotlin-result-jvm:1.1.18" />
+    <properties maven-id="com.michael-bull.kotlin-result:kotlin-result-jvm:1.1.16" />
     <CLASSES>
-      <root url="jar://$MAVEN_REPOSITORY$/com/michael-bull/kotlin-result/kotlin-result-jvm/1.1.18/kotlin-result-jvm-1.1.18.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.8.10/kotlin-stdlib-jdk8-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib/1.8.10/kotlin-stdlib-1.8.10.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/com/michael-bull/kotlin-result/kotlin-result-jvm/1.1.16/kotlin-result-jvm-1.1.16.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-common/1.6.20/kotlin-stdlib-common-1.6.20.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk8/1.6.20/kotlin-stdlib-jdk8-1.6.20.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib/1.6.20/kotlin-stdlib-1.6.20.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/annotations/13.0/annotations-13.0.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk7/1.8.10/kotlin-stdlib-jdk7-1.8.10.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-common/1.8.10/kotlin-stdlib-common-1.8.10.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlin/kotlin-stdlib-jdk7/1.6.20/kotlin-stdlib-jdk7-1.6.20.jar!/" />
     </CLASSES>
     <JAVADOC />
     <SOURCES />

README.md

@@ -14,21 +14,6 @@ Documentation
 Full documentation (syntax reference, how to use the language and the compiler, etc.) can be found at:
 https://prog8.readthedocs.io/
 
-How to get it/build it
-----------------------
-
-- Download the latest [official release](https://github.com/irmen/prog8/releases) from github.
-- Or, if you want/need a bleeding edge development version, you can:
-  - download a build artifact zipfile from a recent [github action build](https://github.com/irmen/prog8/actions).
-  - you can also compile it yourself from source. [Instructions here](https://prog8.readthedocs.io/en/latest/compiling.html).
-
-Community
----------
-Most of the development on Prog8 and the use of it is currently centered around 
-the [Commander X16](https://www.commanderx16.com/) retro computer. Their [discord server](https://discord.gg/nS2PqEC) contains a small channel
-dedicated to Prog8. Other than that, use the issue tracker on github.
-
-
 Software license
 ----------------
 GNU GPL 3.0 (see file LICENSE), with exception for generated code:

codeCore/build.gradle

@@ -26,7 +26,7 @@ compileTestKotlin {
 dependencies {
     // should have no dependencies to other modules
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
-    implementation "com.michael-bull.kotlin-result:kotlin-result-jvm:1.1.18"
+    implementation "com.michael-bull.kotlin-result:kotlin-result-jvm:1.1.16"
 }
 
 sourceSets {

codeCore/src/prog8/code/SymbolTable.kt

@@ -80,16 +80,6 @@ class SymbolTable(astProgram: PtProgram) : StNode(astProgram.name, StNodeType.GL
     }
 
     override fun lookup(scopedName: String) = flat[scopedName]
-
-    fun getLength(name: String): Int? {
-        val node = flat[name]
-        return when(node) {
-            is StMemVar -> node.length
-            is StMemorySlab -> node.size.toInt()
-            is StStaticVariable -> node.length
-            else -> null
-        }
-    }
 }
 
 

codeCore/src/prog8/code/SymbolTableMaker.kt

@@ -94,9 +94,6 @@ class SymbolTableMaker(private val program: PtProgram, private val options: Comp
                     initialString = null
                     numElements = node.arraySize?.toInt()
                 }
-//                if(node.type in SplitWordArrayTypes) {
-//                    ... split array also add _lsb and _msb to symboltable?
-//                }
                 StStaticVariable(node.name, node.type, initialNumeric, initialString, initialArray, numElements, node.zeropage, node)
             }
             is PtBuiltinFunctionCall -> {

codeCore/src/prog8/code/ast/AstBase.kt

@@ -37,17 +37,16 @@ class PtNodeGroup : PtNode(Position.DUMMY)
 sealed class PtNamedNode(var name: String, position: Position): PtNode(position) {
     // Note that as an exception, the 'name' is not read-only
     // but a var. This is to allow for cheap node renames.
-    val scopedName: String
-        get() {
-            var namedParent: PtNode = this.parent
-            return if(namedParent is PtProgram)
-                name
-            else {
-                while (namedParent !is PtNamedNode)
-                    namedParent = namedParent.parent
-                namedParent.scopedName + "." + name
-            }
+    val scopedName: String by lazy {
+        var namedParent: PtNode = this.parent
+        if(namedParent is PtProgram)
+            name
+        else {
+            while (namedParent !is PtNamedNode)
+                namedParent = namedParent.parent
+            namedParent.scopedName + "." + name
         }
+    }
 }
 
 
@@ -64,9 +63,7 @@ class PtProgram(
         children.asSequence().filterIsInstance<PtBlock>()
 
     fun entrypoint(): PtSub? =
-        allBlocks().firstOrNull { it.name == "main" || it.name=="p8_main" }
-            ?.children
-            ?.firstOrNull { it is PtSub && (it.name == "start" || it.name=="main.start" || it.name=="p8_start" || it.name=="p8_main.p8_start") } as PtSub?
+        allBlocks().firstOrNull { it.name == "main" }?.children?.firstOrNull { it is PtSub && (it.name == "start" || it.name=="main.start") } as PtSub?
 }
 
 
@@ -74,7 +71,6 @@ class PtBlock(name: String,
               val address: UInt?,
               val library: Boolean,
               val forceOutput: Boolean,
-              val noSymbolPrefixing: Boolean,
               val alignment: BlockAlignment,
               val source: SourceCode,       // taken from the module the block is defined in.
               position: Position

codeCore/src/prog8/code/ast/AstExpressions.kt

@@ -1,6 +1,9 @@
 package prog8.code.ast
 
-import prog8.code.core.*
+import prog8.code.core.DataType
+import prog8.code.core.Encoding
+import prog8.code.core.NumericDatatypes
+import prog8.code.core.Position
 import java.util.*
 import kotlin.math.abs
 import kotlin.math.round
@@ -25,7 +28,7 @@ sealed class PtExpression(val type: DataType, position: Position) : PtNode(posit
     infix fun isSameAs(other: PtExpression): Boolean {
         return when(this) {
             is PtAddressOf -> other is PtAddressOf && other.type==type && other.identifier isSameAs identifier
-            is PtArrayIndexer -> other is PtArrayIndexer && other.type==type && other.variable isSameAs variable && other.index isSameAs index && other.splitWords==splitWords
+            is PtArrayIndexer -> other is PtArrayIndexer && other.type==type && other.variable isSameAs variable && other.index isSameAs index
             is PtBinaryExpression -> other is PtBinaryExpression && other.left isSameAs left && other.right isSameAs right
             is PtContainmentCheck -> other is PtContainmentCheck && other.type==type && other.element isSameAs element && other.iterable isSameAs iterable
             is PtIdentifier -> other is PtIdentifier && other.type==type && other.name==name
@@ -48,7 +51,7 @@ sealed class PtExpression(val type: DataType, position: Position) : PtNode(posit
                 this.name == target.identifier!!.name
             }
             target.array != null && this is PtArrayIndexer -> {
-                this.variable.name == target.array!!.variable.name && this.index isSameAs target.array!!.index && this.splitWords==target.array!!.splitWords
+                this.variable.name == target.array!!.variable.name && this.index isSameAs target.array!!.index
             }
             else -> false
         }
@@ -115,9 +118,6 @@ class PtArrayIndexer(elementType: DataType, position: Position): PtExpression(el
     val index: PtExpression
         get() = children[1] as PtExpression
 
-    val splitWords: Boolean
-        get() = variable.type in SplitWordArrayTypes
-
     init {
         require(elementType in NumericDatatypes)
     }

codeCore/src/prog8/code/ast/AstPrinter.kt

@@ -17,7 +17,7 @@ fun printAst(root: PtNode, skipLibraries: Boolean, output: (text: String) -> Uni
             is PtConditionalBranch -> "if_${node.condition.name.lowercase()}"
             is PtAddressOf -> "&"
             is PtArray -> "array len=${node.children.size} ${type(node.type)}"
-            is PtArrayIndexer -> "<arrayindexer> ${type(node.type)} ${if(node.splitWords) "[splitwords]" else ""}"
+            is PtArrayIndexer -> "<arrayindexer> ${type(node.type)}"
             is PtBinaryExpression -> "<expr> ${node.operator} ${type(node.type)}"
             is PtBuiltinFunctionCall -> {
                 val str = if(node.void) "void " else ""
@@ -96,14 +96,13 @@ fun printAst(root: PtNode, skipLibraries: Boolean, output: (text: String) -> Uni
                 str
             }
             is PtVariable -> {
-                val split = if(node.type in SplitWordArrayTypes) "@split" else ""
                 val str = if(node.arraySize!=null) {
                     val eltType = ArrayToElementTypes.getValue(node.type)
-                    "${eltType.name.lowercase()}[${node.arraySize}] $split ${node.name}"
+                    "${eltType.name.lowercase()}[${node.arraySize}] ${node.name}"
                 }
                 else if(node.type in ArrayDatatypes) {
                     val eltType = ArrayToElementTypes.getValue(node.type)
-                    "${eltType.name.lowercase()}[] $split ${node.name}"
+                    "${eltType.name.lowercase()}[] ${node.name}"
                 }
                 else
                     "${node.type.name.lowercase()} ${node.name}"

codeCore/src/prog8/code/core/BuiltinFunctions.kt

@@ -68,6 +68,7 @@ class FSignature(val pure: Boolean,      // does it have side effects?
     }
 }
 
+
 val BuiltinFunctions: Map<String, FSignature> = mapOf(
     // this set of function have no return value and operate in-place:
     "rol"       to FSignature(false, listOf(FParam("item", arrayOf(DataType.UBYTE, DataType.UWORD))), null),
@@ -79,41 +80,19 @@ val BuiltinFunctions: Map<String, FSignature> = mapOf(
     // cmp returns a status in the carry flag, but not a proper return value
     "cmp"       to FSignature(false, listOf(FParam("value1", IntegerDatatypesNoBool), FParam("value2", NumericDatatypesNoBool)), null),
     "prog8_lib_stringcompare"       to FSignature(true, listOf(FParam("str1", arrayOf(DataType.STR)), FParam("str2", arrayOf(DataType.STR))), DataType.BYTE),
-    "abs"       to FSignature(true, listOf(FParam("value", NumericDatatypesNoBool)), null),
-    "abs__byte"  to FSignature(true, listOf(FParam("value", arrayOf(DataType.BYTE))), DataType.BYTE),
-    "abs__word"  to FSignature(true, listOf(FParam("value", arrayOf(DataType.WORD))), DataType.WORD),
-    "abs__float" to FSignature(true, listOf(FParam("value", arrayOf(DataType.FLOAT))), DataType.FLOAT),
+    "abs"       to FSignature(true, listOf(FParam("value", IntegerDatatypesNoBool)), DataType.UWORD),
     "len"       to FSignature(true, listOf(FParam("values", IterableDatatypes)), DataType.UWORD),
     // normal functions follow:
-    "sizeof"    to FSignature(true, listOf(FParam("object", DataType.entries.toTypedArray())), DataType.UBYTE),
+    "sizeof"    to FSignature(true, listOf(FParam("object", DataType.values())), DataType.UBYTE),
     "sgn"       to FSignature(true, listOf(FParam("value", NumericDatatypesNoBool)), DataType.BYTE),
-    "sqrt"        to FSignature(true, listOf(FParam("value", NumericDatatypesNoBool)), null),
-    "sqrt__ubyte" to FSignature(true, listOf(FParam("value", arrayOf(DataType.UBYTE))), DataType.UBYTE),
-    "sqrt__uword" to FSignature(true, listOf(FParam("value", arrayOf(DataType.UWORD))), DataType.UBYTE),
-    "sqrt__float" to FSignature(true, listOf(FParam("value", arrayOf(DataType.FLOAT))), DataType.FLOAT),
-    "divmod"           to FSignature(false, listOf(FParam("number", arrayOf(DataType.UBYTE, DataType.UWORD)), FParam("divident", arrayOf(DataType.UBYTE, DataType.UWORD)), FParam("division", arrayOf(DataType.UBYTE, DataType.UWORD)), FParam("remainder", arrayOf(DataType.UBYTE, DataType.UWORD))), null),
-    "divmod__ubyte"    to FSignature(false, listOf(FParam("number", arrayOf(DataType.UBYTE)), FParam("divident", arrayOf(DataType.UBYTE)), FParam("division", arrayOf(DataType.UBYTE)), FParam("remainder", arrayOf(DataType.UBYTE))), null),
-    "divmod__uword"    to FSignature(false, listOf(FParam("number", arrayOf(DataType.UWORD)), FParam("divident", arrayOf(DataType.UWORD)), FParam("division", arrayOf(DataType.UWORD)), FParam("remainder", arrayOf(DataType.UWORD))), null),
+    "sqrt16"    to FSignature(true, listOf(FParam("value", arrayOf(DataType.UWORD))), DataType.UBYTE),
+    "divmod"    to FSignature(false, listOf(FParam("number", arrayOf(DataType.UBYTE)), FParam("divident", arrayOf(DataType.UBYTE)), FParam("division", arrayOf(DataType.UBYTE)), FParam("remainder", arrayOf(DataType.UBYTE))), null),
+    "divmodw"   to FSignature(false, listOf(FParam("number", arrayOf(DataType.UWORD)), FParam("divident", arrayOf(DataType.UWORD)), FParam("division", arrayOf(DataType.UWORD)), FParam("remainder", arrayOf(DataType.UWORD))), null),
     "any"       to FSignature(true, listOf(FParam("values", ArrayDatatypes)), DataType.UBYTE),
     "all"       to FSignature(true, listOf(FParam("values", ArrayDatatypes)), DataType.UBYTE),
     "lsb"       to FSignature(true, listOf(FParam("value", arrayOf(DataType.UWORD, DataType.WORD))), DataType.UBYTE),
     "msb"       to FSignature(true, listOf(FParam("value", arrayOf(DataType.UWORD, DataType.WORD))), DataType.UBYTE),
     "mkword"    to FSignature(true, listOf(FParam("msb", arrayOf(DataType.UBYTE)), FParam("lsb", arrayOf(DataType.UBYTE))), DataType.UWORD),
-    "clamp"     to FSignature(true, listOf(FParam("value", arrayOf(DataType.BYTE)), FParam("minimum", arrayOf(DataType.BYTE)), FParam("maximum", arrayOf(DataType.BYTE))), null),
-    "clamp__byte"  to FSignature(true, listOf(FParam("value", arrayOf(DataType.BYTE)), FParam("minimum", arrayOf(DataType.BYTE)), FParam("maximum", arrayOf(DataType.BYTE))), DataType.BYTE),
-    "clamp__ubyte" to FSignature(true, listOf(FParam("value", arrayOf(DataType.UBYTE)), FParam("minimum", arrayOf(DataType.UBYTE)), FParam("maximum", arrayOf(DataType.UBYTE))), DataType.UBYTE),
-    "clamp__word"  to FSignature(true, listOf(FParam("value", arrayOf(DataType.WORD)), FParam("minimum", arrayOf(DataType.WORD)), FParam("maximum", arrayOf(DataType.WORD))), DataType.WORD),
-    "clamp__uword" to FSignature(true, listOf(FParam("value", arrayOf(DataType.UWORD)), FParam("minimum", arrayOf(DataType.UWORD)), FParam("maximum", arrayOf(DataType.UWORD))), DataType.UWORD),
-    "min"        to FSignature(true, listOf(FParam("val1", arrayOf(DataType.BYTE)), FParam("val2", arrayOf(DataType.BYTE))), null),
-    "min__byte"  to FSignature(true, listOf(FParam("val1", arrayOf(DataType.BYTE)), FParam("val2", arrayOf(DataType.BYTE))), DataType.BYTE),
-    "min__ubyte" to FSignature(true, listOf(FParam("val1", arrayOf(DataType.UBYTE)), FParam("val2", arrayOf(DataType.UBYTE))), DataType.UBYTE),
-    "min__word"  to FSignature(true, listOf(FParam("val1", arrayOf(DataType.WORD)), FParam("val2", arrayOf(DataType.WORD))), DataType.WORD),
-    "min__uword" to FSignature(true, listOf(FParam("val1", arrayOf(DataType.UWORD)), FParam("val2", arrayOf(DataType.UWORD))), DataType.UWORD),
-    "max"        to FSignature(true, listOf(FParam("val1", arrayOf(DataType.BYTE)), FParam("val2", arrayOf(DataType.BYTE))), null),
-    "max__byte"  to FSignature(true, listOf(FParam("val1", arrayOf(DataType.BYTE)), FParam("val2", arrayOf(DataType.BYTE))), DataType.BYTE),
-    "max__ubyte" to FSignature(true, listOf(FParam("val1", arrayOf(DataType.UBYTE)), FParam("val2", arrayOf(DataType.UBYTE))), DataType.UBYTE),
-    "max__word"  to FSignature(true, listOf(FParam("val1", arrayOf(DataType.WORD)), FParam("val2", arrayOf(DataType.WORD))), DataType.WORD),
-    "max__uword" to FSignature(true, listOf(FParam("val1", arrayOf(DataType.UWORD)), FParam("val2", arrayOf(DataType.UWORD))), DataType.UWORD),
     "peek"      to FSignature(true, listOf(FParam("address", arrayOf(DataType.UWORD))), DataType.UBYTE),
     "peekw"     to FSignature(true, listOf(FParam("address", arrayOf(DataType.UWORD))), DataType.UWORD),
     "poke"      to FSignature(false, listOf(FParam("address", arrayOf(DataType.UWORD)), FParam("value", arrayOf(DataType.UBYTE))), null),

codeCore/src/prog8/code/core/CompilationOptions.kt

@@ -19,8 +19,8 @@ class CompilationOptions(val output: OutputType,
                          var asmQuiet: Boolean = false,
                          var asmListfile: Boolean = false,
                          var experimentalCodegen: Boolean = false,
-                         var varsHighBank: Int? = null,
-                         var splitWordArrays: Boolean = false,
+                         var varsHigh: Boolean = false,
+                         var useNewExprCode: Boolean = false,
                          var evalStackBaseAddress: UInt? = null,
                          var outputDir: Path = Path(""),
                          var symbolDefs: Map<String, String> = emptyMap()

codeCore/src/prog8/code/core/Enumerations.kt

@@ -11,9 +11,7 @@ enum class DataType {
     ARRAY_UB,           // pass by reference
     ARRAY_B,            // pass by reference
     ARRAY_UW,           // pass by reference
-    ARRAY_UW_SPLIT,     // pass by reference, lo/hi byte split
     ARRAY_W,            // pass by reference
-    ARRAY_W_SPLIT,      // pass by reference, lo/hi byte split
     ARRAY_F,            // pass by reference
     ARRAY_BOOL,         // pass by reference
     UNDEFINED;
@@ -121,14 +119,12 @@ val IntegerDatatypesNoBool = arrayOf(DataType.UBYTE, DataType.BYTE, DataType.UWO
 val NumericDatatypes = arrayOf(DataType.UBYTE, DataType.BYTE, DataType.UWORD, DataType.WORD, DataType.FLOAT, DataType.BOOL)
 val NumericDatatypesNoBool = arrayOf(DataType.UBYTE, DataType.BYTE, DataType.UWORD, DataType.WORD, DataType.FLOAT)
 val SignedDatatypes =  arrayOf(DataType.BYTE, DataType.WORD, DataType.FLOAT)
-val ArrayDatatypes = arrayOf(DataType.ARRAY_UB, DataType.ARRAY_B, DataType.ARRAY_UW, DataType.ARRAY_UW_SPLIT, DataType.ARRAY_W, DataType.ARRAY_W_SPLIT, DataType.ARRAY_F, DataType.ARRAY_BOOL)
+val ArrayDatatypes = arrayOf(DataType.ARRAY_UB, DataType.ARRAY_B, DataType.ARRAY_UW, DataType.ARRAY_W, DataType.ARRAY_F, DataType.ARRAY_BOOL)
 val StringlyDatatypes = arrayOf(DataType.STR, DataType.ARRAY_UB, DataType.ARRAY_B, DataType.UWORD)
-val SplitWordArrayTypes = arrayOf(DataType.ARRAY_UW_SPLIT, DataType.ARRAY_W_SPLIT)
 val IterableDatatypes = arrayOf(
     DataType.STR,
     DataType.ARRAY_UB, DataType.ARRAY_B,
     DataType.ARRAY_UW, DataType.ARRAY_W,
-    DataType.ARRAY_UW_SPLIT, DataType.ARRAY_W_SPLIT,
     DataType.ARRAY_F, DataType.ARRAY_BOOL
 )
 val PassByValueDatatypes = NumericDatatypes
@@ -139,8 +135,6 @@ val ArrayToElementTypes = mapOf(
     DataType.ARRAY_UB to DataType.UBYTE,
     DataType.ARRAY_W to DataType.WORD,
     DataType.ARRAY_UW to DataType.UWORD,
-    DataType.ARRAY_W_SPLIT to DataType.WORD,
-    DataType.ARRAY_UW_SPLIT to DataType.UWORD,
     DataType.ARRAY_F to DataType.FLOAT,
     DataType.ARRAY_BOOL to DataType.BOOL
 )

codeCore/src/prog8/code/core/IErrorReporter.kt

@@ -3,7 +3,6 @@ package prog8.code.core
 interface IErrorReporter {
     fun err(msg: String, position: Position)
     fun warn(msg: String, position: Position)
-    fun undefined(symbol: List<String>, position: Position)
     fun noErrors(): Boolean
     fun report()
     fun finalizeNumErrors(numErrors: Int, numWarnings: Int) {

codeGenCpu6502/build.gradle

@@ -28,9 +28,9 @@ dependencies {
     implementation project(':codeCore')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
     // implementation "org.jetbrains.kotlin:kotlin-reflect"
-    implementation "com.michael-bull.kotlin-result:kotlin-result-jvm:1.1.18"
+    implementation "com.michael-bull.kotlin-result:kotlin-result-jvm:1.1.16"
 
-    testImplementation 'io.kotest:kotest-runner-junit5-jvm:5.6.2'
+    testImplementation 'io.kotest:kotest-runner-junit5-jvm:5.5.5'
 }
 
 sourceSets {

codeGenCpu6502/src/prog8/codegen/cpu6502/AsmGen.kt

@@ -3,7 +3,6 @@ package prog8.codegen.cpu6502
 import com.github.michaelbull.result.fold
 import prog8.code.StNodeType
 import prog8.code.SymbolTable
-import prog8.code.SymbolTableMaker
 import prog8.code.ast.*
 import prog8.code.core.*
 import prog8.codegen.cpu6502.assignment.*
@@ -15,180 +14,18 @@ import kotlin.io.path.writeLines
 internal const val subroutineFloatEvalResultVar1 = "prog8_float_eval_result1"
 internal const val subroutineFloatEvalResultVar2 = "prog8_float_eval_result2"
 
-class AsmGen6502(val prefixSymbols: Boolean): ICodeGeneratorBackend {
+class AsmGen6502: ICodeGeneratorBackend {
     override fun generate(
         program: PtProgram,
         symbolTable: SymbolTable,
         options: CompilationOptions,
         errors: IErrorReporter
     ): IAssemblyProgram? {
-        val st = if(prefixSymbols) prefixSymbols(program, options, symbolTable) else symbolTable
-        val asmgen = AsmGen6502Internal(program, st, options, errors)
+        val asmgen = AsmGen6502Internal(program, symbolTable, options, errors)
         return asmgen.compileToAssembly()
     }
-
-    private fun prefixSymbols(program: PtProgram, options: CompilationOptions, st: SymbolTable): SymbolTable {
-        val nodesToPrefix = mutableListOf<Pair<PtNode, Int>>()              // parent + index
-        val functionCallsToPrefix = mutableListOf<Pair<PtNode, Int>>()      // parent + index
-
-        fun prefixNamedNode(node: PtNamedNode) {
-            node.name = "p8_${node.name}"
-        }
-
-        fun prefixSymbols(node: PtNode) {
-            when(node) {
-                is PtAsmSub -> {
-                    prefixNamedNode(node)
-                    node.parameters.forEach { (_, param) -> prefixNamedNode(param) }
-                }
-                is PtSub -> {
-                    prefixNamedNode(node)
-                    node.parameters.forEach { prefixNamedNode(it) }
-                }
-                is PtFunctionCall -> {
-                    val stNode = st.lookup(node.name)!!
-                    if(stNode.astNode.definingBlock()?.noSymbolPrefixing!=true) {
-                        val index = node.parent.children.indexOf(node)
-                        functionCallsToPrefix += node.parent to index
-                    }
-                }
-                is PtIdentifier -> {
-                    var lookupName = node.name
-                    if(node.type in SplitWordArrayTypes && (lookupName.endsWith("_lsb") || lookupName.endsWith("_msb"))) {
-                        lookupName = lookupName.dropLast(4)
-                    }
-                    val stNode = st.lookup(lookupName)!!
-                    if(stNode.astNode.definingBlock()?.noSymbolPrefixing!=true) {
-                        val index = node.parent.children.indexOf(node)
-                        nodesToPrefix += node.parent to index
-                    }
-                }
-                is PtJump -> {
-                    if(node.identifier!=null) {
-                        val stNode = st.lookup(node.identifier!!.name)!!
-                        if(stNode.astNode.definingBlock()?.noSymbolPrefixing!=true) {
-                            val index = node.parent.children.indexOf(node)
-                            nodesToPrefix += node.parent to index
-                        }
-                    }
-                    else if(node.generatedLabel!=null) {
-                        val stNode = st.lookup(node.generatedLabel!!)!!
-                        if(stNode.astNode.definingBlock()?.noSymbolPrefixing!=true) {
-                            val index = node.parent.children.indexOf(node)
-                            nodesToPrefix += node.parent to index
-                        }
-                    }
-                }
-                is PtBlock -> prefixNamedNode(node)
-                is PtConstant -> prefixNamedNode(node)
-                is PtLabel -> prefixNamedNode(node)
-                is PtMemMapped -> prefixNamedNode(node)
-                is PtSubroutineParameter -> prefixNamedNode(node)
-                is PtVariable -> {
-                    val index = node.parent.children.indexOf(node)
-                    nodesToPrefix += node.parent to index
-                }
-                else -> { }
-            }
-            node.children.forEach { prefixSymbols(it) }
-        }
-
-        program.allBlocks().forEach { block ->
-            if (!block.noSymbolPrefixing) {
-                prefixSymbols(block)
-            }
-        }
-
-        nodesToPrefix.forEach { (parent, index) ->
-            val node = parent.children[index]
-            when(node) {
-                is PtIdentifier -> parent.children[index] = node.prefix(parent, st)
-                is PtFunctionCall ->  throw AssemblyError("PtFunctionCall should be processed in their own list, last")
-                is PtJump -> parent.children[index] = node.prefix(parent, st)
-                is PtVariable -> parent.children[index] = node.prefix(st)
-                else -> throw AssemblyError("weird node to prefix $node")
-            }
-        }
-
-        // reversed so inner calls (such as arguments to a function call) get processed before the actual function call itself
-        functionCallsToPrefix.reversed().forEach { (parent, index) ->
-            val node = parent.children[index]
-            if(node is PtFunctionCall) {
-                parent.children[index] = node.prefix(parent)
-            } else {
-                throw AssemblyError("expected PtFunctionCall")
-            }
-        }
-
-        return SymbolTableMaker(program, options).make()
-    }
 }
 
-private fun PtVariable.prefix(st: SymbolTable): PtVariable {
-    name = name.split('.').map {"p8_$it" }.joinToString(".")
-    if(value==null)
-        return this
-
-    val arrayValue = value as? PtArray
-    return if(arrayValue!=null && arrayValue.children.any { it !is PtNumber} ) {
-        val newValue = PtArray(arrayValue.type, arrayValue.position)
-        arrayValue.children.forEach { elt ->
-            when(elt) {
-                is PtIdentifier -> newValue.add(elt.prefix(arrayValue, st))
-                is PtNumber -> newValue.add(elt)
-                is PtAddressOf -> {
-                    if(elt.definingBlock()?.noSymbolPrefixing==true)
-                        newValue.add(elt)
-                    else {
-                        val newAddr = PtAddressOf(elt.position)
-                        newAddr.children.add(elt.identifier.prefix(newAddr, st))
-                        newAddr.parent = arrayValue
-                        newValue.add(newAddr)
-                    }
-                }
-                else -> throw AssemblyError("weird array value element $elt")
-            }
-        }
-        PtVariable(name, type, zeropage, newValue, arraySize, position)
-    }
-    else this
-}
-
-private fun PtJump.prefix(parent: PtNode, st: SymbolTable): PtJump {
-    val jump = if(identifier!=null) {
-        val prefixedIdent = identifier!!.prefix(this, st)
-        PtJump(prefixedIdent, address, generatedLabel, position)
-    } else {
-        val prefixedLabel = generatedLabel!!.split('.').map {"p8_$it" }.joinToString(".")
-        PtJump(null, address, prefixedLabel, position)
-    }
-    jump.parent = parent
-    return jump
-}
-
-private fun PtFunctionCall.prefix(parent: PtNode): PtFunctionCall {
-    val newName = name.split('.').map {"p8_$it" }.joinToString(".")
-    val call = PtFunctionCall(newName, void, type, position)
-    call.children.addAll(children)
-    call.children.forEach { it.parent = call }
-    call.parent = parent
-    if(name.endsWith("concat_string"))
-        println("CONCAT ${this.position}")
-    return call
-}
-
-private fun PtIdentifier.prefix(parent: PtNode, st: SymbolTable): PtIdentifier {
-    val target = st.lookup(name)
-    if(target?.astNode?.definingBlock()?.noSymbolPrefixing==true)
-        return this
-
-    val newName = name.split('.').map { "p8_$it" }.joinToString(".")
-    val node = PtIdentifier(newName, type, position)
-    node.parent = parent
-    return node
-}
-
-
 class AsmGen6502Internal (
     val program: PtProgram,
     internal val symbolTable: SymbolTable,
@@ -525,15 +362,13 @@ class AsmGen6502Internal (
     internal fun loadScaledArrayIndexIntoRegister(
         expr: PtArrayIndexer,
         elementDt: DataType,
-        register: CpuRegister
+        register: CpuRegister,
+        addOneExtra: Boolean = false
     ) {
         val reg = register.toString().lowercase()
         val indexnum = expr.index.asConstInteger()
         if (indexnum != null) {
-            val indexValue = if(expr.splitWords)
-                indexnum
-            else
-                indexnum * options.compTarget.memorySize(elementDt)
+            val indexValue = indexnum * options.compTarget.memorySize(elementDt) + if (addOneExtra) 1 else 0
             out("  ld$reg  #$indexValue")
             return
         }
@@ -542,42 +377,77 @@ class AsmGen6502Internal (
             ?: throw AssemblyError("array indexer should have been replaced with a temp var @ ${expr.index.position}")
 
         val indexName = asmVariableName(indexVar)
-
-        if(expr.splitWords) {
-            when (register) {
-                CpuRegister.A -> out("  lda  $indexName")
-                CpuRegister.X -> out("  ldx  $indexName")
-                CpuRegister.Y -> out("  ldy  $indexName")
-            }
-            return
-        }
-
-        when (elementDt) {
-            in ByteDatatypes -> out("  ld$reg  $indexName")
-            in WordDatatypes -> {
-                out("  lda  $indexName |  asl  a")
-                when (register) {
-                    CpuRegister.A -> {}
-                    CpuRegister.X -> out(" tax")
-                    CpuRegister.Y -> out(" tay")
+        if (addOneExtra) {
+            // add 1 to the result
+            when (elementDt) {
+                in ByteDatatypes -> {
+                    out("  ldy  $indexName |  iny")
+                    when (register) {
+                        CpuRegister.A -> out(" tya")
+                        CpuRegister.X -> out(" tyx")
+                        CpuRegister.Y -> {
+                        }
+                    }
                 }
-            }
-            DataType.FLOAT -> {
-                require(options.compTarget.memorySize(DataType.FLOAT) == 5) {"invalid float size ${expr.position}"}
-                out("""
-                    lda  $indexName
-                    asl  a
-                    asl  a
-                    clc
-                    adc  $indexName"""
-                )
-                when (register) {
-                    CpuRegister.A -> {}
-                    CpuRegister.X -> out(" tax")
-                    CpuRegister.Y -> out(" tay")
+                in WordDatatypes -> {
+                    out("  lda  $indexName |  sec |  rol  a")
+                    when (register) {
+                        CpuRegister.A -> {
+                        }
+                        CpuRegister.X -> out(" tax")
+                        CpuRegister.Y -> out(" tay")
+                    }
                 }
+                DataType.FLOAT -> {
+                    require(options.compTarget.memorySize(DataType.FLOAT) == 5) {"invalid float size ${expr.position}"}
+                    out(
+                        """
+                                lda  $indexName
+                                asl  a
+                                asl  a
+                                sec
+                                adc  $indexName"""
+                    )
+                    when (register) {
+                        CpuRegister.A -> {
+                        }
+                        CpuRegister.X -> out(" tax")
+                        CpuRegister.Y -> out(" tay")
+                    }
+                }
+                else -> throw AssemblyError("weird dt")
+            }
+        } else {
+            when (elementDt) {
+                in ByteDatatypes -> out("  ld$reg  $indexName")
+                in WordDatatypes -> {
+                    out("  lda  $indexName |  asl  a")
+                    when (register) {
+                        CpuRegister.A -> {
+                        }
+                        CpuRegister.X -> out(" tax")
+                        CpuRegister.Y -> out(" tay")
+                    }
+                }
+                DataType.FLOAT -> {
+                    require(options.compTarget.memorySize(DataType.FLOAT) == 5) {"invalid float size ${expr.position}"}
+                    out(
+                        """
+                                lda  $indexName
+                                asl  a
+                                asl  a
+                                clc
+                                adc  $indexName"""
+                    )
+                    when (register) {
+                        CpuRegister.A -> {
+                        }
+                        CpuRegister.X -> out(" tax")
+                        CpuRegister.Y -> out(" tay")
+                    }
+                }
+                else -> throw AssemblyError("weird dt")
             }
-            else -> throw AssemblyError("weird dt")
         }
     }
 
@@ -676,6 +546,7 @@ class AsmGen6502Internal (
     private fun translate(stmt: PtIfElse) {
         val condition = stmt.condition as? PtBinaryExpression
         if(condition!=null) {
+            require(!options.useNewExprCode)
             requireComparisonExpression(condition)  // IfStatement: condition must be of form  'x <comparison> <value>'
             if (stmt.elseScope.children.isEmpty()) {
                 val jump = stmt.ifScope.children.singleOrNull()
@@ -803,48 +674,65 @@ class AsmGen6502Internal (
     private fun repeatWordCount(count: Int, stmt: PtRepeatLoop) {
         require(count in 257..65535) { "invalid repeat count ${stmt.position}" }
         val repeatLabel = makeLabel("repeat")
-        val counterVar = createRepeatCounterVar(DataType.UWORD, isTargetCpu(CpuType.CPU65c02), stmt)
-        // the iny + double dec is microoptimization of the 16 bit loop
-        out("""
-            ldy  #>$count
-            lda  #<$count
-            beq  +
-            iny
-+           sta  $counterVar
-            sty  $counterVar+1
+        if(isTargetCpu(CpuType.CPU65c02)) {
+            val counterVar = createRepeatCounterVar(DataType.UWORD, true, stmt)
+            out("""
+                lda  #<$count
+                ldy  #>$count
+                sta  $counterVar
+                sty  $counterVar+1
 $repeatLabel""")
-        translate(stmt.statements)
-        out("""
-            dec  $counterVar
-            bne  $repeatLabel
-            dec  $counterVar+1
-            bne  $repeatLabel""")
+            translate(stmt.statements)
+            out("""
+                lda  $counterVar
+                bne  +
+                dec  $counterVar+1
++               dec  $counterVar
+                lda  $counterVar
+                ora  $counterVar+1
+                bne  $repeatLabel""")
+        } else {
+            val counterVar = createRepeatCounterVar(DataType.UWORD, false, stmt)
+            out("""
+                lda  #<$count
+                ldy  #>$count
+                sta  $counterVar
+                sty  $counterVar+1
+$repeatLabel""")
+            translate(stmt.statements)
+            out("""
+                lda  $counterVar
+                bne  +
+                dec  $counterVar+1
++               dec  $counterVar
+                lda  $counterVar
+                ora  $counterVar+1
+                bne  $repeatLabel""")
+        }
     }
 
     private fun repeatWordCountInAY(endLabel: String, stmt: PtRepeatLoop) {
         // note: A/Y must have been loaded with the number of iterations!
-        // the iny + double dec is microoptimization of the 16 bit loop
+        // no need to explicitly test for 0 iterations as this is done in the countdown logic below
         val repeatLabel = makeLabel("repeat")
         val counterVar = createRepeatCounterVar(DataType.UWORD, false, stmt)
         out("""
-            cmp  #0
-            beq  +
-            iny
-+           sta  $counterVar
-            sty  $counterVar+1
-            ora  $counterVar+1
-            beq  $endLabel
-$repeatLabel""")
+                sta  $counterVar
+                sty  $counterVar+1
+$repeatLabel    lda  $counterVar
+                bne  +
+                lda  $counterVar+1
+                beq  $endLabel
+                lda  $counterVar
+                bne  +
+                dec  $counterVar+1
++               dec  $counterVar
+""")
         translate(stmt.statements)
-        out("""
-            dec  $counterVar
-            bne  $repeatLabel
-            dec  $counterVar+1
-            bne  $repeatLabel""")
+        jmp(repeatLabel)
         out(endLabel)
     }
 
-
     private fun repeatByteCount(count: Int, stmt: PtRepeatLoop) {
         require(count in 2..256) { "invalid repeat count ${stmt.position}" }
         val repeatLabel = makeLabel("repeat")
@@ -1135,10 +1023,18 @@ $repeatLabel""")
     }
 
     internal fun pointerViaIndexRegisterPossible(pointerOffsetExpr: PtExpression): Pair<PtExpression, PtExpression>? {
-        if (pointerOffsetExpr !is PtBinaryExpression) return null
-        val operator = pointerOffsetExpr.operator
-        val left = pointerOffsetExpr.left
-        val right = pointerOffsetExpr.right
+        val left: PtExpression
+        val right: PtExpression
+        val operator: String
+
+        if (pointerOffsetExpr is PtBinaryExpression) {
+            require(!options.useNewExprCode)
+            operator = pointerOffsetExpr.operator
+            left = pointerOffsetExpr.left
+            right = pointerOffsetExpr.right
+        }
+        else return null
+
         if (operator != "+") return null
         val leftDt = left.type
         val rightDt = right.type
@@ -1250,7 +1146,10 @@ $repeatLabel""")
     }
 
     internal fun findSubroutineParameter(name: String, asmgen: AsmGen6502Internal): PtSubroutineParameter? {
-        val stScope = asmgen.symbolTable.lookup(name) ?: return null
+        val stScope = asmgen.symbolTable.lookup(name)
+        require(stScope!=null) {
+            "invalid name lookup $name"
+        }
         val node = stScope.astNode
         if(node is PtSubroutineParameter)
             return node
@@ -2898,6 +2797,7 @@ $repeatLabel""")
                     out("  sta  P8ESTACK_LO,x |  dex")
             }
             is PtBinaryExpression -> {
+                require(!options.useNewExprCode)
                 val addrExpr = expr.address as PtBinaryExpression
                 if(tryOptimizedPointerAccessWithA(addrExpr, addrExpr.operator, false)) {
                     if(pushResultOnEstack)

codeGenCpu6502/src/prog8/codegen/cpu6502/AsmOptimizer.kt

@@ -43,14 +43,7 @@ internal fun optimizeAssembly(lines: MutableList<String>, machine: IMachineDefin
         numberOfOptimizations++
     }
 
-    mods = optimizeJsrRtsAndOtherCombinations(linesByFour)
-    if(mods.isNotEmpty()) {
-        apply(mods, lines)
-        linesByFour = getLinesBy(lines, 4)
-        numberOfOptimizations++
-    }
-
-    mods = optimizeUselessPushPopStack(linesByFour)
+    mods= optimizeJsrRtsAndOtherCombinations(linesByFour)
     if(mods.isNotEmpty()) {
         apply(mods, lines)
         linesByFour = getLinesBy(lines, 4)
@@ -524,40 +517,3 @@ private fun optimizeJsrRtsAndOtherCombinations(linesByFour: List<List<IndexedVal
     }
     return mods
 }
-
-private fun optimizeUselessPushPopStack(linesByFour: List<List<IndexedValue<String>>>): List<Modification> {
-    val mods = mutableListOf<Modification>()
-
-    fun optimize(register: Char, lines: List<IndexedValue<String>>) {
-        if(lines[0].value.trimStart().startsWith("ph$register")) {
-            if(lines[2].value.trimStart().startsWith("pl$register")) {
-                val second = lines[1].value.trimStart().take(6).lowercase()
-                if(register!in second
-                    && !second.startsWith("jsr")
-                    && !second.startsWith("pl")
-                    && !second.startsWith("ph")) {
-                    mods.add(Modification(lines[0].index, true, null))
-                    mods.add(Modification(lines[2].index, true, null))
-                }
-            }
-            else if (lines[3].value.trimStart().startsWith("pl$register")) {
-                val second = lines[1].value.trimStart().take(6).lowercase()
-                val third = lines[2].value.trimStart().take(6).lowercase()
-                if(register !in second && register !in third
-                    && !second.startsWith("jsr") && !third.startsWith("jsr")
-                    && !second.startsWith("pl") && !third.startsWith("pl")
-                    && !second.startsWith("ph") && !third.startsWith("ph")) {
-                    mods.add(Modification(lines[0].index, true, null))
-                    mods.add(Modification(lines[3].index, true, null))
-                }
-            }
-        }
-    }
-
-    for (lines in linesByFour) {
-        optimize('a', lines)
-        optimize('x', lines)
-        optimize('y', lines)
-    }
-    return mods
-}

codeGenCpu6502/src/prog8/codegen/cpu6502/BuiltinFunctionsAsmGen.kt

@@ -31,15 +31,12 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
             "msb" -> funcMsb(fcall, resultToStack, resultRegister)
             "lsb" -> funcLsb(fcall, resultToStack, resultRegister)
             "mkword" -> funcMkword(fcall, resultToStack, resultRegister)
-            "clamp__byte", "clamp__ubyte", "clamp__word", "clamp__uword" -> funcClamp(fcall, resultToStack, resultRegister)
-            "min__byte", "min__ubyte", "min__word", "min__uword" -> funcMin(fcall, resultToStack, resultRegister)
-            "max__byte", "max__ubyte", "max__word", "max__uword" -> funcMax(fcall, resultToStack, resultRegister)
-            "abs__byte", "abs__word", "abs__float" -> funcAbs(fcall, resultToStack, resultRegister, sscope)
+            "abs" -> funcAbs(fcall, resultToStack, resultRegister, sscope)
             "any", "all" -> funcAnyAll(fcall, resultToStack, resultRegister, sscope)
             "sgn" -> funcSgn(fcall, resultToStack, resultRegister, sscope)
-            "sqrt__ubyte", "sqrt__uword", "sqrt__float" -> funcSqrt(fcall, resultToStack, resultRegister, sscope)
-            "divmod__ubyte" -> funcDivmod(fcall)
-            "divmod__uword" -> funcDivmodW(fcall)
+            "sqrt16" -> funcSqrt16(fcall, resultToStack, resultRegister, sscope)
+            "divmod" -> funcDivmod(fcall)
+            "divmodw" -> funcDivmodW(fcall)
             "rol" -> funcRol(fcall)
             "rol2" -> funcRol2(fcall)
             "ror" -> funcRor(fcall)
@@ -272,34 +269,13 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
         asmgen.translateNormalAssignment(assign, fcall.definingISub())
     }
 
-    private fun funcSqrt(fcall: PtBuiltinFunctionCall, resultToStack: Boolean, resultRegister: RegisterOrPair?, scope: IPtSubroutine?) {
+    private fun funcSqrt16(fcall: PtBuiltinFunctionCall, resultToStack: Boolean, resultRegister: RegisterOrPair?, scope: IPtSubroutine?) {
         translateArguments(fcall, scope)
-        when(fcall.args[0].type) {
-            DataType.UBYTE -> {
-                if(resultToStack)
-                    asmgen.out("  ldy  #0 |  jsr  prog8_lib.func_sqrt16_stack")
-                else {
-                    asmgen.out("  ldy  #0 |  jsr  prog8_lib.func_sqrt16_into_A")
-                    assignAsmGen.assignRegisterByte(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, false, fcall.position, scope, asmgen), CpuRegister.A, false)
-                }
-            }
-            DataType.UWORD -> {
-                if(resultToStack)
-                    asmgen.out("  jsr  prog8_lib.func_sqrt16_stack")
-                else {
-                    asmgen.out("  jsr  prog8_lib.func_sqrt16_into_A")
-                    assignAsmGen.assignRegisterByte(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, false, fcall.position, scope, asmgen), CpuRegister.A, false)
-                }
-            }
-            DataType.FLOAT -> {
-                asmgen.out("  jsr  floats.func_sqrt_into_FAC1")
-                if(resultToStack)
-                    assignAsmGen.assignFAC1float(AsmAssignTarget(TargetStorageKind.STACK, asmgen, DataType.FLOAT, scope, fcall.position))
-                else {
-                    assignAsmGen.assignFAC1float(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.FAC1, true, fcall.position, scope, asmgen))
-                }
-            }
-            else -> throw AssemblyError("weird dt")
+        if(resultToStack)
+            asmgen.out("  jsr  prog8_lib.func_sqrt16_stack")
+        else {
+            asmgen.out("  jsr  prog8_lib.func_sqrt16_into_A")
+            assignAsmGen.assignRegisterByte(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, false, fcall.position, scope, asmgen), CpuRegister.A, false)
         }
     }
 
@@ -352,7 +328,6 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
                         lda  #$numElements
                         jsr  floats.func_reverse_f""")
                 }
-                in SplitWordArrayTypes -> TODO("split word reverse")
                 else -> throw AssemblyError("weird type")
             }
         }
@@ -399,7 +374,6 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
                         jsr  prog8_lib.func_sort_ub""")
                 }
                 DataType.ARRAY_F -> throw AssemblyError("sorting of floating point array is not supported")
-                in SplitWordArrayTypes -> TODO("split word sort")
                 else -> throw AssemblyError("weird type")
             }
         } else
@@ -434,8 +408,6 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
             DataType.UWORD -> {
                 when (what) {
                     is PtArrayIndexer -> {
-                        if(what.splitWords)
-                            TODO("ror2 split words ${what.position}")
                         translateRolRorArrayArgs(what.variable, what, "ror2", 'w')
                         asmgen.out("  jsr  prog8_lib.ror2_array_uw")
                     }
@@ -495,8 +467,6 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
             DataType.UWORD -> {
                 when (what) {
                     is PtArrayIndexer -> {
-                        if(what.splitWords)
-                            TODO("ror split words ${what.position}")
                         translateRolRorArrayArgs(what.variable, what, "ror", 'w')
                         asmgen.out("  jsr  prog8_lib.ror_array_uw")
                     }
@@ -539,8 +509,6 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
             DataType.UWORD -> {
                 when (what) {
                     is PtArrayIndexer -> {
-                        if(what.splitWords)
-                            TODO("rol2 split words ${what.position}")
                         translateRolRorArrayArgs(what.variable, what, "rol2", 'w')
                         asmgen.out("  jsr  prog8_lib.rol2_array_uw")
                     }
@@ -600,8 +568,6 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
             DataType.UWORD -> {
                 when (what) {
                     is PtArrayIndexer -> {
-                        if(what.splitWords)
-                            TODO("rol split words ${what.position}")
                         translateRolRorArrayArgs(what.variable, what, "rol", 'w')
                         asmgen.out("  jsr  prog8_lib.rol_array_uw")
                     }
@@ -617,8 +583,6 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
     }
 
     private fun translateRolRorArrayArgs(arrayvar: PtIdentifier, indexer: PtArrayIndexer, operation: String, dt: Char) {
-        if(indexer.splitWords)
-            TODO("rol/ror split words access ${indexer.position}")
         if(arrayvar.type==DataType.UWORD) {
             if(dt!='b')
                 throw AssemblyError("non-array var indexing requires bytes dt")
@@ -666,7 +630,6 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
                 DataType.ARRAY_B, DataType.ARRAY_UB, DataType.STR -> asmgen.out("  jsr  prog8_lib.func_${fcall.name}_b_stack")
                 DataType.ARRAY_UW, DataType.ARRAY_W -> asmgen.out("  jsr  prog8_lib.func_${fcall.name}_w_stack")
                 DataType.ARRAY_F -> asmgen.out("  jsr  floats.func_${fcall.name}_f_stack")
-                in SplitWordArrayTypes -> TODO("split word any/all")
                 else -> throw AssemblyError("weird type $dt")
             }
         } else {
@@ -674,7 +637,6 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
                 DataType.ARRAY_B, DataType.ARRAY_UB, DataType.STR -> asmgen.out("  jsr  prog8_lib.func_${fcall.name}_b_into_A |  ldy  #0")
                 DataType.ARRAY_UW, DataType.ARRAY_W -> asmgen.out("  jsr  prog8_lib.func_${fcall.name}_w_into_A |  ldy  #0")
                 DataType.ARRAY_F -> asmgen.out("  jsr  floats.func_${fcall.name}_f_into_A |  ldy  #0")
-                in SplitWordArrayTypes -> TODO("split word any/all")
                 else -> throw AssemblyError("weird type $dt")
             }
             assignAsmGen.assignRegisterByte(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, false, fcall.position, scope, asmgen), CpuRegister.A, dt in SignedDatatypes)
@@ -686,35 +648,21 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
         val dt = fcall.args.single().type
         if(resultToStack) {
             when (dt) {
+                DataType.UBYTE -> asmgen.out("  ldy  #0")
                 DataType.BYTE -> asmgen.out("  jsr  prog8_lib.abs_b_stack")
+                DataType.UWORD -> {}
                 DataType.WORD -> asmgen.out("  jsr  prog8_lib.abs_w_stack")
-                else -> {
-                    asmgen.out("  jsr  floats.func_abs_f_into_FAC1")
-                    assignAsmGen.assignFAC1float(AsmAssignTarget(TargetStorageKind.STACK, asmgen, DataType.FLOAT, scope, fcall.position))
-                }
+                else -> throw AssemblyError("weird type")
             }
         } else {
             when (dt) {
-                DataType.BYTE -> {
-                    asmgen.out("  jsr  prog8_lib.abs_b_into_A")
-                    assignAsmGen.assignRegisterByte(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, false, fcall.position, scope, asmgen), CpuRegister.A,false)
-                }
-                DataType.WORD -> {
-                    asmgen.out("  jsr  prog8_lib.abs_w_into_AY")
-                    assignAsmGen.assignRegisterpairWord(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.AY, false, fcall.position, scope, asmgen), RegisterOrPair.AY)
-                }
-                DataType.FLOAT -> {
-                    asmgen.out("  jsr  floats.func_abs_f_into_FAC1")
-                    assignAsmGen.assignFAC1float(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.FAC1, true, fcall.position, scope, asmgen))
-                }
-                DataType.UBYTE -> {
-                    asmgen.assignRegister(RegisterOrPair.A, AsmAssignTarget.fromRegisters(resultRegister?:RegisterOrPair.A, false, fcall.position, scope, asmgen))
-                }
-                DataType.UWORD -> {
-                    asmgen.assignRegister(RegisterOrPair.AY, AsmAssignTarget.fromRegisters(resultRegister?:RegisterOrPair.AY, false, fcall.position, scope, asmgen))
-                }
+                DataType.UBYTE -> asmgen.out("  ldy  #0")
+                DataType.BYTE -> asmgen.out("  jsr  prog8_lib.abs_b_into_AY")
+                DataType.UWORD -> {}
+                DataType.WORD -> asmgen.out("  jsr  prog8_lib.abs_w_into_AY")
                 else -> throw AssemblyError("weird type")
             }
+            assignAsmGen.assignRegisterpairWord(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.AY, false, fcall.position, scope, asmgen), RegisterOrPair.AY)
         }
     }
 
@@ -751,6 +699,7 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
                 }
             }
             is PtBinaryExpression -> {
+                require(!asmgen.options.useNewExprCode)
                 val result = asmgen.pointerViaIndexRegisterPossible(addrExpr)
                 val pointer = result?.first as? PtIdentifier
                 if(result!=null && pointer!=null && asmgen.isZpVar(pointer)) {
@@ -812,6 +761,7 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
                 } else fallback()
             }
             is PtBinaryExpression -> {
+                require(!asmgen.options.useNewExprCode)
                 val result = asmgen.pointerViaIndexRegisterPossible(addrExpr)
                 val pointer = result?.first as? PtIdentifier
                 if(result!=null && pointer!=null && asmgen.isZpVar(pointer)) {
@@ -846,161 +796,6 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
         }
     }
 
-    private fun funcClamp(fcall: PtBuiltinFunctionCall, resultToStack: Boolean, resultRegister: RegisterOrPair?) {
-        val signed = fcall.type in SignedDatatypes
-        when(fcall.type) {
-            in ByteDatatypes -> {
-                assignAsmGen.assignExpressionToVariable(fcall.args[1], "P8ZP_SCRATCH_W1", fcall.args[1].type)  // minimum
-                assignAsmGen.assignExpressionToVariable(fcall.args[2], "P8ZP_SCRATCH_W1+1", fcall.args[2].type)  // maximum
-                assignAsmGen.assignExpressionToRegister(fcall.args[0], RegisterOrPair.A, signed)    // value
-                asmgen.out("  jsr  prog8_lib.func_clamp_${fcall.type.toString().lowercase()}")
-                if(resultToStack) {
-                    asmgen.out("  sta  P8ESTACK_LO,x |  dex")
-                } else {
-                    val targetReg = AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, signed, fcall.position, fcall.definingISub(), asmgen)
-                    assignAsmGen.assignRegisterByte(targetReg, CpuRegister.A, signed)
-                }
-            }
-            in WordDatatypes -> {
-                assignAsmGen.assignExpressionToVariable(fcall.args[1], "P8ZP_SCRATCH_W1", fcall.args[1].type)  // minimum
-                assignAsmGen.assignExpressionToVariable(fcall.args[2], "P8ZP_SCRATCH_W2", fcall.args[2].type)  // maximum
-                assignAsmGen.assignExpressionToRegister(fcall.args[0], RegisterOrPair.AY, signed)    // value
-                asmgen.out("  jsr  prog8_lib.func_clamp_${fcall.type.toString().lowercase()}")
-                if(resultToStack) {
-                    asmgen.out("  sta  P8ESTACK_LO,x |  sty  P8ESTACK_HI,x |  dex")
-                } else {
-                    val targetReg = AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.AY, signed, fcall.position, fcall.definingISub(), asmgen)
-                    assignAsmGen.assignRegisterpairWord(targetReg, RegisterOrPair.AY)
-                }
-            }
-            else -> throw AssemblyError("invalid dt")
-        }
-    }
-
-    private fun funcMin(fcall: PtBuiltinFunctionCall, resultToStack: Boolean, resultRegister: RegisterOrPair?) {
-        val signed = fcall.type in SignedDatatypes
-        if(fcall.type in ByteDatatypes) {
-            asmgen.assignExpressionToVariable(fcall.args[1], "P8ZP_SCRATCH_B1", fcall.type)     // right
-            asmgen.assignExpressionToRegister(fcall.args[0], RegisterOrPair.A)          // left
-            asmgen.out("  cmp  P8ZP_SCRATCH_B1")
-            if(signed) asmgen.out("  bmi  +") else asmgen.out("  bcc  +")
-            asmgen.out("""
-                lda  P8ZP_SCRATCH_B1
-+""")
-            if(resultToStack) {
-                asmgen.out("  sta  P8ESTACK_LO,x |  dex")
-            } else {
-                val targetReg = AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, signed, fcall.position, fcall.definingISub(), asmgen)
-                asmgen.assignRegister(RegisterOrPair.A, targetReg)
-            }
-        } else if(fcall.type in WordDatatypes) {
-            asmgen.assignExpressionToVariable(fcall.args[0], "P8ZP_SCRATCH_W1", fcall.type)     // left
-            asmgen.assignExpressionToVariable(fcall.args[1], "P8ZP_SCRATCH_W2", fcall.type)     // right
-            if(signed) {
-                asmgen.out("""
-                    lda  P8ZP_SCRATCH_W1
-                    ldy  P8ZP_SCRATCH_W1+1
-                    cmp  P8ZP_SCRATCH_W2
-                    tya
-                    sbc  P8ZP_SCRATCH_W2+1
-                    bvc  +
-                    eor  #$80
-+                   bpl  +
-                    lda  P8ZP_SCRATCH_W1                   
-                    ldy  P8ZP_SCRATCH_W1+1
-                    jmp  ++
-+                   lda  P8ZP_SCRATCH_W2
-                    ldy  P8ZP_SCRATCH_W2+1
-+""")
-            } else {
-                asmgen.out("""
-                    lda  P8ZP_SCRATCH_W1+1
-                    cmp  P8ZP_SCRATCH_W2+1
-                    bcc  ++
-                    bne  +
-                    lda  P8ZP_SCRATCH_W1
-                    cmp  P8ZP_SCRATCH_W2
-                    bcc  ++
-+                   lda  P8ZP_SCRATCH_W2
-                    ldy  P8ZP_SCRATCH_W2+1
-                    jmp  ++
-+                   lda  P8ZP_SCRATCH_W1
-                    ldy  P8ZP_SCRATCH_W1+1
-+""")
-            }
-            if(resultToStack) {
-                asmgen.out("  sta  P8ESTACK_LO,x |  sty  P8ESTACK_HI,x |  dex")
-            } else {
-                val targetReg = AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.AY, signed, fcall.position, fcall.definingISub(), asmgen)
-                asmgen.assignRegister(RegisterOrPair.AY, targetReg)
-            }
-        } else {
-            throw AssemblyError("min float not supported")
-        }
-    }
-
-    private fun funcMax(fcall: PtBuiltinFunctionCall, resultToStack: Boolean, resultRegister: RegisterOrPair?) {
-        val signed = fcall.type in SignedDatatypes
-        if(fcall.type in ByteDatatypes) {
-            asmgen.assignExpressionToVariable(fcall.args[0], "P8ZP_SCRATCH_B1", fcall.type)     // left
-            asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.A)          // right
-            asmgen.out("  cmp  P8ZP_SCRATCH_B1")
-            if(signed) asmgen.out("  bpl  +") else asmgen.out("  bcs  +")
-            asmgen.out("""
-                lda  P8ZP_SCRATCH_B1
-+""")
-            if(resultToStack) {
-                asmgen.out("  sta  P8ESTACK_LO,x |  dex")
-            } else {
-                val targetReg = AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, signed, fcall.position, fcall.definingISub(), asmgen)
-                asmgen.assignRegister(RegisterOrPair.A, targetReg)
-            }
-        } else if(fcall.type in WordDatatypes) {
-            asmgen.assignExpressionToVariable(fcall.args[0], "P8ZP_SCRATCH_W1", fcall.type)     // left
-            asmgen.assignExpressionToVariable(fcall.args[1], "P8ZP_SCRATCH_W2", fcall.type)     // right
-            if(signed) {
-                asmgen.out("""
-                    lda  P8ZP_SCRATCH_W1
-                    ldy  P8ZP_SCRATCH_W1+1
-                    cmp  P8ZP_SCRATCH_W2
-                    tya
-                    sbc  P8ZP_SCRATCH_W2+1
-                    bvc  +
-                    eor  #$80
-+                   bmi  +
-                    lda  P8ZP_SCRATCH_W1                   
-                    ldy  P8ZP_SCRATCH_W1+1
-                    jmp  ++
-+                   lda  P8ZP_SCRATCH_W2
-                    ldy  P8ZP_SCRATCH_W2+1
-+""")
-            } else {
-                asmgen.out("""
-                    lda  P8ZP_SCRATCH_W1+1
-                    cmp  P8ZP_SCRATCH_W2+1
-                    bcc  ++
-                    bne  +
-                    lda  P8ZP_SCRATCH_W1
-                    cmp  P8ZP_SCRATCH_W2
-                    bcc  ++
-+                   lda  P8ZP_SCRATCH_W1
-                    ldy  P8ZP_SCRATCH_W1+1
-                    jmp  ++
-+                   lda  P8ZP_SCRATCH_W2
-                    ldy  P8ZP_SCRATCH_W2+1
-+""")
-            }
-            if(resultToStack) {
-                asmgen.out("  sta  P8ESTACK_LO,x |  sty  P8ESTACK_HI,x |  dex")
-            } else {
-                val targetReg = AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.AY, signed, fcall.position, fcall.definingISub(), asmgen)
-                asmgen.assignRegister(RegisterOrPair.AY, targetReg)
-            }
-        } else {
-            throw AssemblyError("max float not supported")
-        }
-    }
-
     private fun funcMkword(fcall: PtBuiltinFunctionCall, resultToStack: Boolean, resultRegister: RegisterOrPair?) {
         if(resultToStack) {
             asmgen.assignExpressionToRegister(fcall.args[0], RegisterOrPair.A)      // msb
@@ -1160,27 +955,9 @@ internal class BuiltinFunctionsAsmGen(private val program: PtProgram,
                         //       and will not generate another cmp when lsb() is directly used inside a comparison expression.
                     }
                     RegisterOrPair.Y -> {
+                        asmgen.out("  pha")
                         asmgen.assignExpressionToRegister(fcall.args.single(), RegisterOrPair.AY)
-                        asmgen.out("  tay |  cpy  #0")
-                    }
-                    RegisterOrPair.AY -> {
-                        asmgen.assignExpressionToRegister(fcall.args.single(), RegisterOrPair.AY)
-                        asmgen.out("  ldy  #0 |  cmp  #0")
-                    }
-                    RegisterOrPair.AX -> {
-                        asmgen.assignExpressionToRegister(fcall.args.single(), RegisterOrPair.AX)
-                        asmgen.out("  ldx  #0 |  cmp  #0")
-                    }
-                    RegisterOrPair.XY -> {
-                        asmgen.assignExpressionToRegister(fcall.args.single(), RegisterOrPair.XY)
-                        asmgen.out("  ldy  #0 |  cpx  #0")
-                    }
-                    in Cx16VirtualRegisters -> {
-                        asmgen.assignExpressionToRegister(fcall.args.single(), resultRegister)
-                        val zero = PtNumber(DataType.UBYTE, 0.0, Position.DUMMY)
-                        zero.parent=fcall
-                        assignAsmGen.assignExpressionToVariable(zero, "cx16.${resultRegister.toString().lowercase()}H", DataType.UBYTE)
-                        asmgen.out("  lda  cx16.r0L")
+                        asmgen.out("  tay |  pla |  cpy  #0")
                     }
                     else -> throw AssemblyError("invalid reg")
                 }

codeGenCpu6502/src/prog8/codegen/cpu6502/ExpressionsAsmGen.kt

@@ -237,9 +237,6 @@ internal class ExpressionsAsmGen(private val program: PtProgram,
             DataType.FLOAT -> {
                 asmgen.out(" lda  #<$varname |  ldy  #>$varname|  jsr  floats.push_float")
             }
-            in SplitWordArrayTypes -> {
-                throw AssemblyError("can't push address of split-word array ${expr.position}")
-            }
             in IterableDatatypes -> {
                 asmgen.out("  lda  #<$varname  |  sta  P8ESTACK_LO,x  |  lda  #>$varname |  sta  P8ESTACK_HI,x |  dex")
             }
@@ -248,6 +245,8 @@ internal class ExpressionsAsmGen(private val program: PtProgram,
     }
 
     private fun translateExpression(expr: PtBinaryExpression) {
+        require(!asmgen.options.useNewExprCode)
+
         // Uses evalstack to evaluate the given expression.  THIS IS SLOW AND SHOULD BE AVOIDED!
         if(translateSomewhatOptimized(expr.left, expr.operator, expr.right))
             return
@@ -762,9 +761,6 @@ internal class ExpressionsAsmGen(private val program: PtProgram,
             return
         }
 
-        if(arrayExpr.splitWords)
-            TODO("split words expression ${arrayExpr.position}")
-
         val constIndexNum = arrayExpr.index.asConstInteger()
         if(constIndexNum!=null) {
             val indexValue = constIndexNum * program.memsizer.memorySize(elementDt)

codeGenCpu6502/src/prog8/codegen/cpu6502/ForLoopsAsmGen.kt

@@ -51,35 +51,7 @@ internal class ForLoopsAsmGen(private val program: PtProgram,
                     // loop over byte range via loopvar
                     val varname = asmgen.asmVariableName(stmt.variable)
                     asmgen.assignExpressionToVariable(range.from, varname, ArrayToElementTypes.getValue(iterableDt))
-                    asmgen.assignExpressionToRegister(range.to, RegisterOrPair.A, false)
-                    // pre-check for end already reached
-                    if(iterableDt==DataType.ARRAY_B) {
-                        asmgen.out("  sta  $modifiedLabel+1")
-                        if(stepsize<0)
-                            asmgen.out("""
-                                clc
-                                sbc  $varname
-                                bvc  +
-                                eor  #${'$'}80
-+                               bpl  $endLabel""")
-                        else
-                            asmgen.out("""
-                                sec
-                                sbc  $varname
-                                bvc  +
-                                eor  #${'$'}80
-+                               bmi  $endLabel""")
-                    } else {
-                        if(stepsize<0)
-                            asmgen.out("""
-                                cmp  $varname
-                                beq  +
-                                bcs  $endLabel
-+""")
-                        else
-                            asmgen.out("  cmp  $varname  |  bcc  $endLabel")
-                        asmgen.out("  sta  $modifiedLabel+1")
-                    }
+                    asmgen.assignExpressionToVariable(range.to, "$modifiedLabel+1", ArrayToElementTypes.getValue(iterableDt))
                     asmgen.out(loopLabel)
                     asmgen.translate(stmt.statements)
                     asmgen.out("""
@@ -97,35 +69,7 @@ $modifiedLabel          cmp  #0         ; modified
                     // loop over byte range via loopvar
                     val varname = asmgen.asmVariableName(stmt.variable)
                     asmgen.assignExpressionToVariable(range.from, varname, ArrayToElementTypes.getValue(iterableDt))
-                    asmgen.assignExpressionToRegister(range.to, RegisterOrPair.A, false)
-                    // pre-check for end already reached
-                    if(iterableDt==DataType.ARRAY_B) {
-                        asmgen.out("  sta  $modifiedLabel+1")
-                        if(stepsize<0)
-                            asmgen.out("""
-                                clc
-                                sbc  $varname
-                                bvc  +
-                                eor  #${'$'}80
-+                               bpl  $endLabel""")
-                        else
-                            asmgen.out("""
-                                sec
-                                sbc  $varname
-                                bvc  +
-                                eor  #${'$'}80
-+                               bmi  $endLabel""")
-                    } else {
-                        if(stepsize<0)
-                            asmgen.out("""
-                                cmp  $varname
-                                beq  +
-                                bcs  $endLabel
-+""")
-                        else
-                            asmgen.out("  cmp  $varname  |  bcc  $endLabel")
-                        asmgen.out("  sta  $modifiedLabel+1")
-                    }
+                    asmgen.assignExpressionToVariable(range.to, "$modifiedLabel+1", ArrayToElementTypes.getValue(iterableDt))
                     asmgen.out(loopLabel)
                     asmgen.translate(stmt.statements)
                     if(stepsize>0) {
@@ -156,9 +100,8 @@ $modifiedLabel              cmp  #0     ; modified
 
                     stepsize == 1 || stepsize == -1 -> {
                         val varname = asmgen.asmVariableName(stmt.variable)
-                        assignLoopvarWord(stmt, range)
+                        assignLoopvar(stmt, range)
                         asmgen.assignExpressionToRegister(range.to, RegisterOrPair.AY)
-                        precheckFromToWord(iterableDt, stepsize, varname, endLabel)
                         asmgen.out("""
                             sty  $modifiedLabel+1
                             sta  $modifiedLabel2+1
@@ -191,9 +134,8 @@ $modifiedLabel2 cmp  #0    ; modified
 
                         // (u)words, step >= 2
                         val varname = asmgen.asmVariableName(stmt.variable)
-                        assignLoopvarWord(stmt, range)
+                        assignLoopvar(stmt, range)
                         asmgen.assignExpressionToRegister(range.to, RegisterOrPair.AY)
-                        precheckFromToWord(iterableDt, stepsize, varname, endLabel)
                         asmgen.out("""
                             sty  $modifiedLabel+1
                             sta  $modifiedLabel2+1
@@ -240,15 +182,31 @@ $endLabel""")
 
                         // (u)words, step <= -2
                         val varname = asmgen.asmVariableName(stmt.variable)
-                        assignLoopvarWord(stmt, range)
+                        assignLoopvar(stmt, range)
                         asmgen.assignExpressionToRegister(range.to, RegisterOrPair.AY)
-                        precheckFromToWord(iterableDt, stepsize, varname, endLabel)
                         asmgen.out("""
                             sty  $modifiedLabel+1
                             sta  $modifiedLabel2+1
 $loopLabel""")
                         asmgen.translate(stmt.statements)
 
+                        if(iterableDt==DataType.ARRAY_UW) {
+                            asmgen.out("""
+                lda  $varname
+                sec
+                sbc  #<${stepsize.absoluteValue}
+                sta  $varname
+                lda  $varname+1
+                sbc  #>${stepsize.absoluteValue}
+                sta  $varname+1
+$modifiedLabel  cmp  #0    ; modified                
+                bcc  $endLabel
+                bne  $loopLabel
+                lda  $varname
+$modifiedLabel2 cmp  #0    ; modified 
+                bcs  $loopLabel
+$endLabel""")
+                        } else {
                             asmgen.out("""
                 lda  $varname
                 sec
@@ -266,6 +224,7 @@ $modifiedLabel  sbc  #0    ; modified
                 eor  #$80
 +               bpl  $loopLabel                
 $endLabel""")
+                        }
                     }
                 }
             }
@@ -275,56 +234,6 @@ $endLabel""")
         asmgen.loopEndLabels.pop()
     }
 
-    private fun precheckFromToWord(iterableDt: DataType, stepsize: Int, fromVar: String, endLabel: String) {
-        // pre-check for end already reached.
-        // 'to' is in AY, do NOT clobber this!
-        if(iterableDt==DataType.ARRAY_W) {
-            if(stepsize<0)
-                asmgen.out("""
-                    sta  P8ZP_SCRATCH_W2        ; to
-                    sty  P8ZP_SCRATCH_W2+1      ; to
-                    lda  $fromVar
-	                cmp  P8ZP_SCRATCH_W2
-                    lda  $fromVar+1
-	                sbc  P8ZP_SCRATCH_W2+1
-	                bvc  +
-	                eor  #${'$'}80
-+           		bmi  $endLabel
-                    lda  P8ZP_SCRATCH_W2
-                    ldy  P8ZP_SCRATCH_W2+1""")
-            else
-                asmgen.out("""
-                    sta  P8ZP_SCRATCH_REG
-	                cmp  $fromVar
-	                tya
-	                sbc  $fromVar+1
-	                bvc  +
-	                eor  #${'$'}80
-+           		bmi  $endLabel
-                    lda  P8ZP_SCRATCH_REG""")
-        } else {
-            if(stepsize<0)
-                asmgen.out("""
-                    cpy  $fromVar+1
-                    beq  +
-                    bcc  ++
-                    bcs  $endLabel
-+                   cmp  $fromVar
-                    bcc  +
-                    beq  +
-                    bne  $endLabel
-+""")
-            else
-                asmgen.out("""
-                	cpy  $fromVar+1
-	                bcc  $endLabel
-	                bne  +
-	                cmp  $fromVar
-	                bcc  $endLabel
-+""")
-        }
-    }
-
     private fun translateForOverIterableVar(stmt: PtForLoop, iterableDt: DataType, ident: PtIdentifier) {
         val loopLabel = asmgen.makeLabel("for_loop")
         val endLabel = asmgen.makeLabel("for_end")
@@ -423,46 +332,7 @@ $loopLabel          sty  $indexVar
                     // allocate index var on ZP if possible
                     val result = zeropage.allocate(indexVar, DataType.UBYTE, null, stmt.position, asmgen.errors)
                     result.fold(
-                        success = { (address,_,_)-> asmgen.out("""$indexVar = $address  ; auto zp UBYTE""") },
-                        failure = { asmgen.out("$indexVar    .byte  0") }
-                    )
-                } else {
-                    asmgen.out("$indexVar    .byte  0")
-                }
-                asmgen.out(endLabel)
-            }
-            DataType.ARRAY_UW_SPLIT, DataType.ARRAY_W_SPLIT -> {
-                numElements!!
-                val indexVar = asmgen.makeLabel("for_index")
-                val loopvarName = asmgen.asmVariableName(stmt.variable)
-                asmgen.out("""
-                    ldy  #0
-$loopLabel          sty  $indexVar
-                    lda  ${iterableName}_lsb,y
-                    sta  $loopvarName
-                    lda  ${iterableName}_msb,y
-                    sta  $loopvarName+1""")
-                asmgen.translate(stmt.statements)
-                if(numElements<=255u) {
-                    asmgen.out("""
-                        ldy  $indexVar
-                        iny
-                        cpy  #$numElements
-                        beq  $endLabel
-                        bne  $loopLabel""")
-                } else {
-                    // length is 256
-                    asmgen.out("""
-                        ldy  $indexVar
-                        iny
-                        bne  $loopLabel
-                        beq  $endLabel""")
-                }
-                if(numElements>=16u) {
-                    // allocate index var on ZP if possible
-                    val result = zeropage.allocate(indexVar, DataType.UBYTE, null, stmt.position, asmgen.errors)
-                    result.fold(
-                        success = { (address,_,_)-> asmgen.out("""$indexVar = $address  ; auto zp UBYTE""") },
+                        success = { (address,_)-> asmgen.out("""$indexVar = $address  ; auto zp UBYTE""") },
                         failure = { asmgen.out("$indexVar    .byte  0") }
                     )
                 } else {
@@ -720,7 +590,7 @@ $loopLabel""")
         asmgen.loopEndLabels.pop()
     }
 
-    private fun assignLoopvarWord(stmt: PtForLoop, range: PtRange) =
+    private fun assignLoopvar(stmt: PtForLoop, range: PtRange) =
         asmgen.assignExpressionToVariable(
             range.from,
             asmgen.asmVariableName(stmt.variable),

codeGenCpu6502/src/prog8/codegen/cpu6502/FunctionCallAsmGen.kt

@@ -164,7 +164,7 @@ internal class FunctionCallAsmGen(private val program: PtProgram, private val as
             if(requiredDt!=value.type)
                 throw AssemblyError("for statusflag, byte value is required")
             if (statusflag == Statusflag.Pc) {
-                // this boolean param needs to be set last, right before the jsr
+                // this param needs to be set last, right before the jsr
                 // for now, this is already enforced on the subroutine definition by the Ast Checker
                 when(value) {
                     is PtNumber -> {
@@ -183,7 +183,12 @@ internal class FunctionCallAsmGen(private val program: PtProgram, private val as
                     }
                     else -> {
                         asmgen.assignExpressionToRegister(value, RegisterOrPair.A)
-                        asmgen.out("  ror  a")
+                        asmgen.out("""
+                            beq  +
+                            sec
+                            bcs  ++
++                           clc
++""")
                     }
                 }
             } else throw AssemblyError("can only use Carry as status flag parameter")

codeGenCpu6502/src/prog8/codegen/cpu6502/PostIncrDecrAsmGen.kt

@@ -65,31 +65,6 @@ internal class PostIncrDecrAsmGen(private val program: PtProgram, private val as
                 val asmArrayvarname = asmgen.asmVariableName(targetArrayIdx.variable)
                 val elementDt = targetArrayIdx.type
                 val constIndex = targetArrayIdx.index.asConstInteger()
-                if(targetArrayIdx.splitWords) {
-                    if(constIndex!=null) {
-                        if(incr)
-                            asmgen.out(" inc  ${asmArrayvarname}_lsb+$constIndex |  bne  + |  inc  ${asmArrayvarname}_msb+$constIndex |+")
-                        else
-                            asmgen.out("""
-        lda  ${asmArrayvarname}_lsb+$constIndex
-        bne  +
-        dec  ${asmArrayvarname}_msb+$constIndex
-+       dec  ${asmArrayvarname}_lsb+$constIndex""")
-                    } else {
-                        asmgen.saveRegisterLocal(CpuRegister.X, scope!!)
-                        asmgen.loadScaledArrayIndexIntoRegister(targetArrayIdx, elementDt, CpuRegister.X)
-                        if(incr)
-                            asmgen.out(" inc  ${asmArrayvarname}_lsb,x |  bne  + |  inc  ${asmArrayvarname}_msb,x |+")
-                        else
-                            asmgen.out("""
-        lda  ${asmArrayvarname}_lsb,x
-        bne  +
-        dec  ${asmArrayvarname}_msb,x
-+       dec  ${asmArrayvarname}_lsb,x""")
-                        asmgen.restoreRegisterLocal(CpuRegister.X)
-                    }
-                    return
-                }
                 if(constIndex!=null) {
                     val indexValue = constIndex * program.memsizer.memorySize(elementDt)
                     when(elementDt) {
@@ -99,10 +74,11 @@ internal class PostIncrDecrAsmGen(private val program: PtProgram, private val as
                                 asmgen.out(" inc  $asmArrayvarname+$indexValue |  bne  + |  inc  $asmArrayvarname+$indexValue+1 |+")
                             else
                                 asmgen.out("""
-        lda  $asmArrayvarname+$indexValue
-        bne  +
-        dec  $asmArrayvarname+$indexValue+1
-+       dec  $asmArrayvarname+$indexValue""")
+    lda  $asmArrayvarname+$indexValue
+    bne  +
+    dec  $asmArrayvarname+$indexValue+1
++       dec  $asmArrayvarname+$indexValue 
+""")
                         }
                         DataType.FLOAT -> {
                             asmgen.out("  lda  #<($asmArrayvarname+$indexValue) |  ldy  #>($asmArrayvarname+$indexValue)")
@@ -113,8 +89,9 @@ internal class PostIncrDecrAsmGen(private val program: PtProgram, private val as
                 }
                 else
                 {
+                    asmgen.loadScaledArrayIndexIntoRegister(targetArrayIdx, elementDt, CpuRegister.A)
                     asmgen.saveRegisterLocal(CpuRegister.X, scope!!)
-                    asmgen.loadScaledArrayIndexIntoRegister(targetArrayIdx, elementDt, CpuRegister.X)
+                    asmgen.out("  tax")
                     when(elementDt) {
                         in ByteDatatypes -> {
                             asmgen.out(if(incr) "  inc  $asmArrayvarname,x" else "  dec  $asmArrayvarname,x")
@@ -124,20 +101,20 @@ internal class PostIncrDecrAsmGen(private val program: PtProgram, private val as
                                 asmgen.out(" inc  $asmArrayvarname,x |  bne  + |  inc  $asmArrayvarname+1,x |+")
                             else
                                 asmgen.out("""
-        lda  $asmArrayvarname,x
-        bne  +
-        dec  $asmArrayvarname+1,x
+    lda  $asmArrayvarname,x
+    bne  +
+    dec  $asmArrayvarname+1,x
 +       dec  $asmArrayvarname,x 
 """)
                         }
                         DataType.FLOAT -> {
                             asmgen.out("""
-        ldy  #>$asmArrayvarname
-        clc
-        adc  #<$asmArrayvarname
-        bcc  +
-        iny
-+       jsr  floats.inc_var_f""")
+                    ldy  #>$asmArrayvarname
+                    clc
+                    adc  #<$asmArrayvarname
+                    bcc  +
+                    iny
++                       jsr  floats.inc_var_f""")
                         }
                         else -> throw AssemblyError("weird array elt dt")
                     }

codeGenCpu6502/src/prog8/codegen/cpu6502/ProgramAndVarsGen.kt

@@ -33,9 +33,8 @@ internal class ProgramAndVarsGen(
     internal fun generate() {
         header()
         val allBlocks = program.allBlocks()
-
-        if(allBlocks.first().name != "p8_main" && allBlocks.first().name != "main")
-            throw AssemblyError("first block should be 'main' or 'p8_main'")
+        if(allBlocks.first().name != "main")
+            throw AssemblyError("first block should be 'main'")
 
         if(errors.noErrors())  {
             program.allBlocks().forEach { block2asm(it) }
@@ -105,15 +104,15 @@ internal class ProgramAndVarsGen(
                         asmgen.out("+\t.word  0")
                         asmgen.out("prog8_entrypoint\t; assembly code starts here")
                         if(!options.noSysInit)
-                            asmgen.out("  jsr  sys.init_system")
-                        asmgen.out("  jsr  sys.init_system_phase2")
+                            asmgen.out("  jsr  ${compTarget.name}.init_system")
+                        asmgen.out("  jsr  ${compTarget.name}.init_system_phase2")
                     }
                     CbmPrgLauncherType.NONE -> {
                         asmgen.out("; ---- program without basic sys call ----")
                         asmgen.out("* = ${options.loadAddress.toHex()}")
                         if(!options.noSysInit)
-                            asmgen.out("  jsr  sys.init_system")
-                        asmgen.out("  jsr  sys.init_system_phase2")
+                            asmgen.out("  jsr  ${compTarget.name}.init_system")
+                        asmgen.out("  jsr  ${compTarget.name}.init_system_phase2")
                     }
                 }
             }
@@ -121,8 +120,8 @@ internal class ProgramAndVarsGen(
                 asmgen.out("; ---- atari xex program ----")
                 asmgen.out("* = ${options.loadAddress.toHex()}")
                 if(!options.noSysInit)
-                    asmgen.out("  jsr  sys.init_system")
-                asmgen.out("  jsr  sys.init_system_phase2")
+                    asmgen.out("  jsr  ${compTarget.name}.init_system")
+                asmgen.out("  jsr  ${compTarget.name}.init_system_phase2")
             }
         }
 
@@ -140,24 +139,24 @@ internal class ProgramAndVarsGen(
             "cx16" -> {
                 if(options.floats)
                     asmgen.out("  lda  #4 |  sta  $01")    // to use floats, make sure Basic rom is banked in
-                asmgen.out("  jsr  p8_main.p8_start")
-                asmgen.out("  jmp  sys.cleanup_at_exit")
+                asmgen.out("  jsr  main.start")
+                asmgen.out("  jmp  ${compTarget.name}.cleanup_at_exit")
             }
             "c64" -> {
-                asmgen.out("  jsr  p8_main.p8_start |  lda  #31 |  sta  $01")
+                asmgen.out("  jsr  main.start |  lda  #31 |  sta  $01")
                 if(!options.noSysInit)
-                    asmgen.out("  jmp  sys.cleanup_at_exit")
+                    asmgen.out("  jmp  ${compTarget.name}.cleanup_at_exit")
                 else
                     asmgen.out("  rts")
             }
             "c128" -> {
-                asmgen.out("  jsr  p8_main.p8_start |  lda  #0 |  sta ${"$"}ff00")
+                asmgen.out("  jsr  main.start |  lda  #0 |  sta ${"$"}ff00")
                 if(!options.noSysInit)
-                    asmgen.out("  jmp  sys.cleanup_at_exit")
+                    asmgen.out("  jmp  ${compTarget.name}.cleanup_at_exit")
                 else
                     asmgen.out("  rts")
             }
-            else -> asmgen.jmp("p8_main.p8_start")
+            else -> asmgen.jmp("main.start")
         }
     }
 
@@ -176,8 +175,7 @@ internal class ProgramAndVarsGen(
 
     private fun footer() {
         asmgen.out("; bss sections")
-        asmgen.out("PROG8_VARSHIGH_RAMBANK = ${options.varsHighBank ?: 1}")
-        if(options.varsHighBank!=null) {
+        if(options.varsHigh) {
             if(options.compTarget.machine.BSSHIGHRAM_START == 0u || options.compTarget.machine.BSSHIGHRAM_END==0u) {
                 throw AssemblyError("current compilation target hasn't got the high ram area properly defined")
             }
@@ -313,9 +311,7 @@ internal class ProgramAndVarsGen(
 
         asmgen.out("${sub.name}\t$asmStartScope")
 
-        val scope = symboltable.lookupOrElse(sub.scopedName) {
-            throw AssemblyError("lookup ${sub.scopedName}")
-        }
+        val scope = symboltable.lookupOrElse(sub.scopedName) { throw AssemblyError("lookup") }
         require(scope.type==StNodeType.SUBROUTINE)
         val varsInSubroutine = getVars(scope)
 
@@ -335,7 +331,7 @@ internal class ProgramAndVarsGen(
         asmsubs2asm(sub.children)
 
         // the main.start subroutine is the program's entrypoint and should perform some initialization logic
-        if((sub.name=="start" || sub.name=="p8_start") && (sub.definingBlock()!!.name=="main" || sub.definingBlock()!!.name=="p8_main"))
+        if(sub.name=="start" && sub.definingBlock()!!.name=="main")
             entrypointInitialization()
 
         if(functioncallAsmGen.optimizeIntArgsViaRegisters(sub)) {
@@ -484,8 +480,8 @@ internal class ProgramAndVarsGen(
         val vars = allocator.zeropageVars.filter { it.value.dt==DataType.STR }
         for (variable in vars) {
             val scopedName = variable.key
-            val svar = symboltable.lookup(scopedName) as? StStaticVariable
-            if(svar?.onetimeInitializationStringValue!=null)
+            val svar = symboltable.flat.getValue(scopedName) as StStaticVariable
+            if(svar.onetimeInitializationStringValue!=null)
                 result.add(ZpStringWithInitial(scopedName, variable.value, svar.onetimeInitializationStringValue!!))
         }
         return result
@@ -496,8 +492,8 @@ internal class ProgramAndVarsGen(
         val vars = allocator.zeropageVars.filter { it.value.dt in ArrayDatatypes }
         for (variable in vars) {
             val scopedName = variable.key
-            val svar = symboltable.lookup(scopedName) as? StStaticVariable
-            if(svar?.onetimeInitializationArrayValue!=null)
+            val svar = symboltable.flat.getValue(scopedName) as StStaticVariable
+            if(svar.onetimeInitializationArrayValue!=null)
                 result.add(ZpArrayWithInitial(scopedName, variable.value, svar.onetimeInitializationArrayValue!!))
         }
         return result
@@ -547,11 +543,6 @@ internal class ProgramAndVarsGen(
             DataType.UWORD -> asmgen.out("${variable.name}\t.word  ?")
             DataType.WORD -> asmgen.out("${variable.name}\t.sint  ?")
             DataType.FLOAT -> asmgen.out("${variable.name}\t.fill  ${compTarget.machine.FLOAT_MEM_SIZE}")
-            in SplitWordArrayTypes -> {
-                val numbytesPerHalf = compTarget.memorySize(variable.dt, variable.length!!) / 2
-                asmgen.out("${variable.name}_lsb\t.fill  $numbytesPerHalf")
-                asmgen.out("${variable.name}_msb\t.fill  $numbytesPerHalf")
-            }
             in ArrayDatatypes -> {
                 val numbytes = compTarget.memorySize(variable.dt, variable.length!!)
                 asmgen.out("${variable.name}\t.fill  $numbytes")
@@ -636,18 +627,6 @@ internal class ProgramAndVarsGen(
                         asmgen.out("  .sint  " + chunk.joinToString())
                 }
             }
-            DataType.ARRAY_UW_SPLIT -> {
-                val data = makeArrayFillDataUnsigned(dt, value, orNumberOfZeros)
-                asmgen.out("_array_$varname := ${data.joinToString()}")
-                asmgen.out("${varname}_lsb\t.byte <_array_$varname")
-                asmgen.out("${varname}_msb\t.byte >_array_$varname")
-            }
-            DataType.ARRAY_W_SPLIT -> {
-                val data = makeArrayFillDataSigned(dt, value, orNumberOfZeros)
-                asmgen.out("_array_$varname := ${data.joinToString()}")
-                asmgen.out("${varname}_lsb\t.byte <_array_$varname")
-                asmgen.out("${varname}_msb\t.byte >_array_$varname")
-            }
             DataType.ARRAY_F -> {
                 val array = value ?: zeroFilledArray(orNumberOfZeros!!)
                 val floatFills = array.map {
@@ -707,7 +686,7 @@ internal class ProgramAndVarsGen(
                     val number = it.number!!.toInt()
                     "$"+number.toString(16).padStart(2, '0')
                 }
-            DataType.ARRAY_UW, DataType.ARRAY_UW_SPLIT -> array.map {
+            DataType.ARRAY_UW -> array.map {
                 if(it.number!=null) {
                     "$" + it.number!!.toInt().toString(16).padStart(4, '0')
                 }
@@ -739,11 +718,11 @@ internal class ProgramAndVarsGen(
                     else
                         "-$$hexnum"
                 }
-            DataType.ARRAY_UW, DataType.ARRAY_UW_SPLIT -> array.map {
+            DataType.ARRAY_UW -> array.map {
                 val number = it.number!!.toInt()
                 "$" + number.toString(16).padStart(4, '0')
             }
-            DataType.ARRAY_W, DataType.ARRAY_W_SPLIT -> array.map {
+            DataType.ARRAY_W -> array.map {
                 val number = it.number!!.toInt()
                 val hexnum = number.absoluteValue.toString(16).padStart(4, '0')
                 if(number>=0)

codeGenCpu6502/src/prog8/codegen/cpu6502/assignment/AsmAssignment.kt

@@ -115,7 +115,7 @@ internal class AsmAssignTarget(val kind: TargetStorageKind,
                 left is PtIdentifier && left.name==scopedName
             }
             TargetStorageKind.ARRAY -> {
-                left is PtArrayIndexer && left isSameAs array!! && left.splitWords==array.splitWords
+                left is PtArrayIndexer && left isSameAs array!!
             }
             TargetStorageKind.MEMORY -> {
                 left isSameAs memory!!
@@ -178,8 +178,8 @@ internal class AsmAssignSource(val kind: SourceStorageKind,
                     AsmAssignSource(SourceStorageKind.EXPRESSION, program, asmgen, value.type, expression = value)
                 }
                 is PtFunctionCall -> {
-                    val symbol = asmgen.symbolTable.lookup(value.name) ?: throw AssemblyError("lookup error ${value.name}")
-                    val sub = symbol.astNode as IPtSubroutine
+                    val symbol = asmgen.symbolTable.lookup(value.name)
+                    val sub = symbol!!.astNode as IPtSubroutine
                     val returnType = sub.returnsWhatWhere().firstOrNull { rr -> rr.first.registerOrPair != null || rr.first.statusflag!=null }?.second
                             ?: throw AssemblyError("can't translate zero return values in assignment")
 

codeGenCpu6502/src/prog8/codegen/cpu6502/assignment/AssignmentAsmGen.kt

@@ -45,12 +45,12 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                 val variable = assign.source.asmVarname
                 when (assign.target.datatype) {
                     DataType.UBYTE, DataType.BYTE -> assignVariableByte(assign.target, variable)
-                    DataType.WORD -> assignVariableWord(assign.target, variable, assign.source.datatype)
+                    DataType.WORD -> assignVariableWord(assign.target, variable)
                     DataType.UWORD -> {
                         if(assign.source.datatype in PassByReferenceDatatypes)
                             assignAddressOf(assign.target, variable)
                         else
-                            assignVariableWord(assign.target, variable, assign.source.datatype)
+                            assignVariableWord(assign.target, variable)
                     }
                     DataType.FLOAT -> assignVariableFloat(assign.target, variable)
                     DataType.STR -> assignVariableString(assign.target, variable)
@@ -80,20 +80,6 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                 }
 
                 val constIndex = value.index.asConstInteger()
-
-                if(value.splitWords) {
-                    require(elementDt in WordDatatypes)
-                    if(constIndex!=null) {
-                        asmgen.out("  lda  ${arrayVarName}_lsb+$constIndex |  ldy  ${arrayVarName}_msb+$constIndex")
-                        assignRegisterpairWord(assign.target, RegisterOrPair.AY)
-                    } else {
-                        asmgen.loadScaledArrayIndexIntoRegister(value, elementDt, CpuRegister.Y)
-                        asmgen.out("  lda  ${arrayVarName}_lsb,y |  pha |  lda  ${arrayVarName}_msb,y |  tay |  pla")
-                        assignRegisterpairWord(assign.target, RegisterOrPair.AY)
-                    }
-                    return
-                }
-
                 if (constIndex!=null) {
                     // constant array index value
                     val indexValue = constIndex * program.memsizer.memorySize(elementDt)
@@ -158,6 +144,7 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                         assignMemoryByte(assign.target, null, value.address as PtIdentifier)
                     }
                     is PtBinaryExpression -> {
+                        require(!asmgen.options.useNewExprCode)
                         val addrExpr = value.address as PtBinaryExpression
                         if(asmgen.tryOptimizedPointerAccessWithA(addrExpr, addrExpr.operator, false)) {
                             assignRegisterByte(assign.target, CpuRegister.A, false)
@@ -288,86 +275,20 @@ internal class AssignmentAsmGen(private val program: PtProgram,
             }
             is PtPrefix -> {
                 if(assign.target.array==null) {
-                    if(assign.source.datatype==assign.target.datatype) {
-                        if(assign.source.datatype in IntegerDatatypes) {
-                            val signed = assign.source.datatype in SignedDatatypes
-                            if(assign.source.datatype in ByteDatatypes) {
-                                assignExpressionToRegister(value.value, RegisterOrPair.A, signed)
-                                when(value.operator) {
-                                    "+" -> {}
-                                    "-" -> {
-                                        if(asmgen.isTargetCpu(CpuType.CPU65c02))
-                                            asmgen.out("  eor  #255 |  ina")
-                                        else
-                                            asmgen.out("  eor  #255 |  clc |  adc  #1")
-                                    }
-                                    "~" -> asmgen.out("  eor  #255")
-                                    "not" -> throw AssemblyError("not should have been replaced in the Ast by ==0")
-                                    else -> throw AssemblyError("invalid prefix operator")
-                                }
-                                assignRegisterByte(assign.target, CpuRegister.A, signed)
-                            } else {
-                                assignExpressionToRegister(value.value, RegisterOrPair.AY, signed)
-                                when(value.operator) {
-                                    "+" -> {}
-                                    "-" -> {
-                                        asmgen.out("""
-                                            sec
-                                            eor  #255
-                                            adc  #0
-                                            pha
-                                            tya
-                                            eor  #255
-                                            adc  #0
-                                            tay
-                                            pla""")
-                                    }
-                                    "~" -> asmgen.out("  pha |  tya |  eor  #255 |  tay |  pla |  eor  #255")
-                                    "not" -> throw AssemblyError("not should have been replaced in the Ast by ==0")
-                                    else -> throw AssemblyError("invalid prefix operator")
-                                }
-                                assignRegisterpairWord(assign.target, RegisterOrPair.AY)
-                            }
-                        } else {
-                            // First assign the value to the target then apply the operator in place on the target.
-                            // This saves a temporary variable
-                            translateNormalAssignment(
-                                AsmAssignment(
-                                    AsmAssignSource.fromAstSource(value.value, program, asmgen),
-                                    assign.target, program.memsizer, assign.position
-                                ), scope
-                            )
-                            when (value.operator) {
-                                "+" -> {}
-                                "-" -> inplaceNegate(assign, true, scope)
-                                "~" -> inplaceInvert(assign, scope)
-                                "not" -> throw AssemblyError("not should have been replaced in the Ast by ==0")
-                                else -> throw AssemblyError("invalid prefix operator")
-                            }
-                        }
-                    } else {
-                        // use a temporary variable
-                        val tempvar = if(value.type in ByteDatatypes) "P8ZP_SCRATCH_B1" else "P8ZP_SCRATCH_W1"
-                        assignExpressionToVariable(value.value, tempvar, value.type)
-                        when (value.operator) {
-                            "+" -> {}
-                            "-", "~" -> {
-                                val assignTempvar = AsmAssignment(
-                                    AsmAssignSource(SourceStorageKind.VARIABLE, program, asmgen, value.type, variableAsmName = tempvar),
-                                    AsmAssignTarget(TargetStorageKind.VARIABLE, asmgen, value.type, scope, assign.position, variableAsmName = tempvar),
-                                    program.memsizer, assign.position)
-                                if(value.operator=="-")
-                                    inplaceNegate(assignTempvar, true, scope)
-                                else
-                                    inplaceInvert(assignTempvar, scope)
-                            }
-                            "not" -> throw AssemblyError("not should have been replaced in the Ast by ==0")
-                            else -> throw AssemblyError("invalid prefix operator")
-                        }
-                        if(value.type in ByteDatatypes)
-                            assignVariableByte(assign.target, tempvar)
-                        else
-                            assignVariableWord(assign.target, tempvar, value.type)
+                    // First assign the value to the target then apply the operator in place on the target.
+                    // This saves a temporary variable
+                    translateNormalAssignment(
+                        AsmAssignment(
+                            AsmAssignSource.fromAstSource(value.value, program, asmgen),
+                            assign.target, program.memsizer, assign.position
+                        ), scope
+                    )
+                    when (value.operator) {
+                        "+" -> {}
+                        "-" -> inplaceNegate(assign, true, scope)
+                        "~" -> inplaceInvert(assign, scope)
+                        "not" -> throw AssemblyError("not should have been replaced in the Ast by ==0")
+                        else -> throw AssemblyError("invalid prefix operator")
                     }
                 } else {
                     assignPrefixedExpressionToArrayElt(assign, scope)
@@ -378,6 +299,7 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                 assignRegisterByte(assign.target, CpuRegister.A, false)
             }
             is PtBinaryExpression -> {
+                require(!asmgen.options.useNewExprCode)
                 if(!attemptAssignOptimizedBinexpr(value, assign)) {
                     // All remaining binary expressions just evaluate via the stack for now.
                     // (we can't use the assignment helper functions (assignExpressionTo...) to do it via registers here,
@@ -404,7 +326,7 @@ internal class AssignmentAsmGen(private val program: PtProgram,
             asmgen.translateNormalAssignment(assignToTempvar, scope)
             when(assign.target.datatype) {
                 in ByteDatatypes -> assignVariableByte(assign.target, tempvar)
-                in WordDatatypes -> assignVariableWord(assign.target, tempvar, assign.source.datatype)
+                in WordDatatypes -> assignVariableWord(assign.target, tempvar)
                 DataType.FLOAT -> assignVariableFloat(assign.target, tempvar)
                 else -> throw AssemblyError("weird dt")
             }
@@ -423,6 +345,7 @@ internal class AssignmentAsmGen(private val program: PtProgram,
     }
 
     private fun attemptAssignOptimizedBinexpr(expr: PtBinaryExpression, assign: AsmAssignment): Boolean {
+        require(!asmgen.options.useNewExprCode)
         if(expr.operator in ComparisonOperators) {
             if(expr.right.asConstInteger() == 0) {
                 if(expr.operator == "==" || expr.operator=="!=") {
@@ -811,7 +734,10 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                     }
                     in WordDatatypes -> {
                         asmgen.assignWordOperandsToAYAndVar(expr.right, expr.left, "P8ZP_SCRATCH_W1")
-                        asmgen.out("  jsr  math.multiply_words")
+                        asmgen.out("""
+                            jsr  math.multiply_words
+                            lda  math.multiply_words.result
+                            ldy  math.multiply_words.result+1""")
                         assignRegisterpairWord(assign.target, RegisterOrPair.AY)
                         return true
                     }
@@ -829,14 +755,18 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                         return true
                     }
                     in WordDatatypes -> {
-                        if (value in asmgen.optimizedWordMultiplications) {
-                            assignExpressionToRegister(expr.left, RegisterOrPair.AY, expr.type in SignedDatatypes)
+                        assignExpressionToRegister(expr.left, RegisterOrPair.AY, expr.type in SignedDatatypes)
+                        if (value in asmgen.optimizedWordMultiplications)
                             asmgen.out("  jsr  math.mul_word_${value}")
-                        }
-                        else {
-                            asmgen.assignWordOperandsToAYAndVar(expr.right, expr.left, "P8ZP_SCRATCH_W1")
-                            asmgen.out("  jsr  math.multiply_words")
-                        }
+                        else
+                            asmgen.out("""
+                            sta  P8ZP_SCRATCH_W1
+                            sty  P8ZP_SCRATCH_W1+1
+                            lda  #<$value
+                            ldy  #>$value
+                            jsr  math.multiply_words
+                            lda  math.multiply_words.result
+                            ldy  math.multiply_words.result+1""")
                         assignRegisterpairWord(assign.target, RegisterOrPair.AY)
                         return true
                     }
@@ -893,7 +823,7 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                 DataType.UWORD -> {
                     asmgen.assignWordOperandsToAYAndVar(expr.right, expr.left, "P8ZP_SCRATCH_W1")
                     asmgen.out("  jsr  math.divmod_uw_asm")
-                    assignVariableWord(assign.target, "P8ZP_SCRATCH_W2", DataType.UWORD)
+                    assignVariableWord(assign.target, "P8ZP_SCRATCH_W2")
                     return true
                 }
                 else -> return false
@@ -1211,6 +1141,7 @@ internal class AssignmentAsmGen(private val program: PtProgram,
     }
 
     private fun attemptAssignToByteCompareZero(expr: PtBinaryExpression, assign: AsmAssignment): Boolean {
+        require(!asmgen.options.useNewExprCode)
         when (expr.operator) {
             "==" -> {
                 when(val dt = expr.left.type) {
@@ -1390,6 +1321,7 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                             assignMemoryByteIntoWord(target, null, value.address as PtIdentifier)
                         }
                         is PtBinaryExpression -> {
+                            require(!asmgen.options.useNewExprCode)
                             val addrExpr = value.address as PtBinaryExpression
                             if(asmgen.tryOptimizedPointerAccessWithA(addrExpr, addrExpr.operator, false)) {
                                 asmgen.out("  ldy  #0")
@@ -1919,26 +1851,20 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                             asmgen.out(" inx | lda  P8ESTACK_LO,x  | sta  ${target.asmVarname}+$scaledIdx")
                         }
                         in WordDatatypes -> {
-                            if(target.array!!.splitWords)
-                                asmgen.out("""
-                                    inx
-                                    lda  P8ESTACK_LO,x
-                                    sta  ${target.asmVarname}_lsb+$scaledIdx
-                                    lda  P8ESTACK_HI,x
-                                    sta  ${target.asmVarname}_msb+$scaledIdx""")
-                            else
-                                asmgen.out("""
-                                    inx
-                                    lda  P8ESTACK_LO,x
-                                    sta  ${target.asmVarname}+$scaledIdx
-                                    lda  P8ESTACK_HI,x
-                                    sta  ${target.asmVarname}+$scaledIdx+1""")
+                            asmgen.out("""
+                                inx
+                                lda  P8ESTACK_LO,x
+                                sta  ${target.asmVarname}+$scaledIdx
+                                lda  P8ESTACK_HI,x
+                                sta  ${target.asmVarname}+$scaledIdx+1
+                            """)
                         }
                         DataType.FLOAT -> {
                             asmgen.out("""
                                 lda  #<(${target.asmVarname}+$scaledIdx)
                                 ldy  #>(${target.asmVarname}+$scaledIdx)
-                                jsr  floats.pop_float""")
+                                jsr  floats.pop_float
+                            """)
                         }
                         else -> throw AssemblyError("weird target variable type ${target.datatype}")
                     }
@@ -1952,8 +1878,6 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                             asmgen.out(" inx |  lda  P8ESTACK_LO,x |  sta  ${target.asmVarname},y")
                         }
                         DataType.UWORD, DataType.WORD -> {
-                            if(target.array.splitWords)
-                                TODO("assign into split words ${target.position}")
                             asmgen.loadScaledArrayIndexIntoRegister(target.array, target.datatype, CpuRegister.Y)
                             asmgen.out("""
                                 inx
@@ -2115,29 +2039,20 @@ internal class AssignmentAsmGen(private val program: PtProgram,
         }
     }
 
-    private fun assignVariableWord(target: AsmAssignTarget, sourceName: String, sourceDt: DataType) {
-        require(sourceDt in WordDatatypes || sourceDt==DataType.UBYTE)
+    private fun assignVariableWord(target: AsmAssignTarget, sourceName: String) {
         when(target.kind) {
             TargetStorageKind.VARIABLE -> {
-                if(sourceDt==DataType.UBYTE) {
-                    asmgen.out("  lda  $sourceName |  sta  ${target.asmVarname}")
-                    if(asmgen.isTargetCpu(CpuType.CPU65c02))
-                        asmgen.out("  stz  ${target.asmVarname}")
-                    else
-                        asmgen.out("  lda  #0 |  sta  ${target.asmVarname}")
-                }
-                else
-                    asmgen.out("""
-                        lda  $sourceName
-                        ldy  $sourceName+1
-                        sta  ${target.asmVarname}
-                        sty  ${target.asmVarname}+1""")
+                asmgen.out("""
+                    lda  $sourceName
+                    ldy  $sourceName+1
+                    sta  ${target.asmVarname}
+                    sty  ${target.asmVarname}+1
+                """)
             }
             TargetStorageKind.MEMORY -> {
                 throw AssemblyError("assign word to memory ${target.memory} should have gotten a typecast")
             }
             TargetStorageKind.ARRAY -> {
-                if(sourceDt==DataType.UBYTE) TODO("assign byte to word array")
                 target.array!!
                 if(target.constArrayIndexValue!=null) {
                     val scaledIdx = target.constArrayIndexValue!! * program.memsizer.memorySize(target.datatype).toUInt()
@@ -2146,18 +2061,12 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                             asmgen.out(" lda  $sourceName  | sta  ${target.asmVarname}+$scaledIdx")
                         }
                         in WordDatatypes -> {
-                            if(target.array.splitWords)
-                                asmgen.out("""
-                                    lda  $sourceName
-                                    sta  ${target.asmVarname}_lsb+${target.constArrayIndexValue}
-                                    lda  $sourceName+1
-                                    sta  ${target.asmVarname}_msb+${target.constArrayIndexValue}""")
-                            else
-                                asmgen.out("""
-                                    lda  $sourceName
-                                    sta  ${target.asmVarname}+$scaledIdx
-                                    lda  $sourceName+1
-                                    sta  ${target.asmVarname}+$scaledIdx+1""")
+                            asmgen.out("""
+                                lda  $sourceName
+                                sta  ${target.asmVarname}+$scaledIdx
+                                lda  $sourceName+1
+                                sta  ${target.asmVarname}+$scaledIdx+1
+                            """)
                         }
                         DataType.FLOAT -> {
                             asmgen.out("""
@@ -2167,7 +2076,8 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                                 sty  P8ZP_SCRATCH_W1+1
                                 lda  #<(${target.asmVarname}+$scaledIdx)
                                 ldy  #>(${target.asmVarname}+$scaledIdx)
-                                jsr  floats.copy_float""")
+                                jsr  floats.copy_float
+                            """)
                         }
                         else -> throw AssemblyError("weird target variable type ${target.datatype}")
                     }
@@ -2181,18 +2091,12 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                         }
                         DataType.UWORD, DataType.WORD -> {
                             asmgen.loadScaledArrayIndexIntoRegister(target.array, target.datatype, CpuRegister.Y)
-                            if(target.array.splitWords)
-                                asmgen.out("""
-                                    lda  $sourceName
-                                    sta  ${target.asmVarname}_lsb,y
-                                    lda  $sourceName+1
-                                    sta  ${target.asmVarname}_msb,y""")
-                            else
-                                asmgen.out("""
-                                    lda  $sourceName
-                                    sta  ${target.asmVarname},y
-                                    lda  $sourceName+1
-                                    sta  ${target.asmVarname}+1,y""")
+                            asmgen.out("""
+                                lda  $sourceName
+                                sta  ${target.asmVarname},y
+                                lda  $sourceName+1
+                                sta  ${target.asmVarname}+1,y
+                            """)
                         }
                         DataType.FLOAT -> {
                             asmgen.loadScaledArrayIndexIntoRegister(target.array, target.datatype, CpuRegister.A)
@@ -2213,53 +2117,29 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                 }
             }
             TargetStorageKind.REGISTER -> {
-                if(sourceDt==DataType.UBYTE) {
-                    when(target.register!!) {
-                        RegisterOrPair.AX -> asmgen.out("  ldx  #0 |  lda  $sourceName")
-                        RegisterOrPair.AY -> asmgen.out("  ldy  #0 |  lda  $sourceName")
-                        RegisterOrPair.XY -> asmgen.out("  ldy  #0 |  ldx  $sourceName")
-                        in Cx16VirtualRegisters -> {
-                            asmgen.out("  lda  $sourceName |  sta  cx16.${target.register.toString().lowercase()}")
-                            if(asmgen.isTargetCpu(CpuType.CPU65c02))
-                                asmgen.out("  stz  cx16.${target.register.toString().lowercase()}+1")
-                            else
-                                asmgen.out("  lda  #0 |  sta  cx16.${target.register.toString().lowercase()}+1")
-                        }
-                        else -> throw AssemblyError("can't load word in a single 8-bit register")
-                    }
-                } else {
-                    when(target.register!!) {
-                        RegisterOrPair.AX -> asmgen.out("  ldx  $sourceName+1 |  lda  $sourceName")
-                        RegisterOrPair.AY -> asmgen.out("  ldy  $sourceName+1 |  lda  $sourceName")
-                        RegisterOrPair.XY -> asmgen.out("  ldy  $sourceName+1 |  ldx  $sourceName")
-                        in Cx16VirtualRegisters -> {
-                            asmgen.out(
-                                """
-                                lda  $sourceName
-                                sta  cx16.${target.register.toString().lowercase()}
-                                lda  $sourceName+1
-                                sta  cx16.${target.register.toString().lowercase()}+1
-                            """)
-                        }
-                        else -> throw AssemblyError("can't load word in a single 8-bit register")
+                when(target.register!!) {
+                    RegisterOrPair.AX -> asmgen.out("  ldx  $sourceName+1 |  lda  $sourceName")
+                    RegisterOrPair.AY -> asmgen.out("  ldy  $sourceName+1 |  lda  $sourceName")
+                    RegisterOrPair.XY -> asmgen.out("  ldy  $sourceName+1 |  ldx  $sourceName")
+                    in Cx16VirtualRegisters -> {
+                        asmgen.out(
+                            """
+                            lda  $sourceName
+                            sta  cx16.${target.register.toString().lowercase()}
+                            lda  $sourceName+1
+                            sta  cx16.${target.register.toString().lowercase()}+1
+                        """)
                     }
+                    else -> throw AssemblyError("can't load word in a single 8-bit register")
                 }
             }
             TargetStorageKind.STACK -> {
-                if(sourceDt==DataType.UBYTE) {
-                    asmgen.out("  lda  $sourceName |  sta  P8ESTACK_LO,x")
-                    if(asmgen.isTargetCpu(CpuType.CPU65c02))
-                        asmgen.out("  stz  P8ESTACK_HI,x")
-                    else
-                        asmgen.out("  lda  #0 |  sta  P8ESTACK_HI,x")
-                }
-                else
-                    asmgen.out("""
-                        lda  $sourceName
-                        sta  P8ESTACK_LO,x
-                        lda  $sourceName+1
-                        sta  P8ESTACK_HI,x
-                        dex""")
+                asmgen.out("""
+                    lda  $sourceName
+                    sta  P8ESTACK_LO,x
+                    lda  $sourceName+1
+                    sta  P8ESTACK_HI,x
+                    dex""")
             }
         }
     }
@@ -2415,14 +2295,12 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                     }
                     return
                 }
-                if(target.array!!.splitWords)
-                    TODO("assign into split words ${target.position}")
                 if (target.constArrayIndexValue!=null) {
                     val scaledIdx = target.constArrayIndexValue!! * program.memsizer.memorySize(target.datatype).toUInt()
                     asmgen.out(" lda  $sourceName  | sta  ${target.asmVarname}+$scaledIdx")
                 }
                 else {
-                    asmgen.loadScaledArrayIndexIntoRegister(target.array, target.datatype, CpuRegister.Y)
+                    asmgen.loadScaledArrayIndexIntoRegister(target.array!!, target.datatype, CpuRegister.Y)
                     asmgen.out(" lda  $sourceName |  sta  ${target.asmVarname},y")
                 }
             }
@@ -2470,8 +2348,6 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                     """)
             }
             TargetStorageKind.ARRAY -> {
-                if(wordtarget.array!!.splitWords)
-                    TODO("assign byte into split words ${wordtarget.position}")
                 if (wordtarget.constArrayIndexValue!=null) {
                     val scaledIdx = wordtarget.constArrayIndexValue!! * 2u
                     asmgen.out("  lda  $sourceName")
@@ -2480,7 +2356,7 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                 }
                 else {
                     asmgen.saveRegisterLocal(CpuRegister.X, wordtarget.scope!!)
-                    asmgen.loadScaledArrayIndexIntoRegister(wordtarget.array, wordtarget.datatype, CpuRegister.X)
+                    asmgen.loadScaledArrayIndexIntoRegister(wordtarget.array!!, wordtarget.datatype, CpuRegister.X)
                     asmgen.out("  lda  $sourceName")
                     asmgen.signExtendAYlsb(DataType.BYTE)
                     asmgen.out("  sta  ${wordtarget.asmVarname},x |  inx |  tya |  sta  ${wordtarget.asmVarname},x")
@@ -2550,41 +2426,22 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                     asmgen.out("  lda  #0 |  sta  ${wordtarget.asmVarname}+1")
             }
             TargetStorageKind.ARRAY -> {
-                if(wordtarget.array!!.splitWords) {
-                    if (wordtarget.constArrayIndexValue!=null) {
-                        val scaledIdx = wordtarget.constArrayIndexValue!!
-                        asmgen.out("  lda  $sourceName  | sta  ${wordtarget.asmVarname}_lsb+$scaledIdx")
-                        if(asmgen.isTargetCpu(CpuType.CPU65c02))
-                            asmgen.out("  stz  ${wordtarget.asmVarname}_msb+$scaledIdx")
-                        else
-                            asmgen.out("  lda  #0  | sta  ${wordtarget.asmVarname}_msb+$scaledIdx")
-                    }
-                    else {
-                        asmgen.loadScaledArrayIndexIntoRegister(wordtarget.array, wordtarget.datatype, CpuRegister.Y)
-                        asmgen.out("""
-                            lda  $sourceName
-                            sta  ${wordtarget.asmVarname}_lsb,y
-                            lda  #0
-                            sta  ${wordtarget.asmVarname}_msb,y""")
-                    }
-                } else {
-                    if (wordtarget.constArrayIndexValue!=null) {
-                        val scaledIdx = wordtarget.constArrayIndexValue!! * 2u
-                        asmgen.out("  lda  $sourceName  | sta  ${wordtarget.asmVarname}+$scaledIdx")
-                        if(asmgen.isTargetCpu(CpuType.CPU65c02))
-                            asmgen.out("  stz  ${wordtarget.asmVarname}+$scaledIdx+1")
-                        else
-                            asmgen.out("  lda  #0  | sta  ${wordtarget.asmVarname}+$scaledIdx+1")
-                    }
-                    else {
-                        asmgen.loadScaledArrayIndexIntoRegister(wordtarget.array, wordtarget.datatype, CpuRegister.Y)
-                        asmgen.out("""
-                            lda  $sourceName
-                            sta  ${wordtarget.asmVarname},y
-                            iny
-                            lda  #0
-                            sta  ${wordtarget.asmVarname},y""")
-                    }
+                if (wordtarget.constArrayIndexValue!=null) {
+                    val scaledIdx = wordtarget.constArrayIndexValue!! * 2u
+                    asmgen.out("  lda  $sourceName  | sta  ${wordtarget.asmVarname}+$scaledIdx")
+                    if(asmgen.isTargetCpu(CpuType.CPU65c02))
+                        asmgen.out("  stz  ${wordtarget.asmVarname}+$scaledIdx+1")
+                    else
+                        asmgen.out("  lda  #0  | sta  ${wordtarget.asmVarname}+$scaledIdx+1")
+                }
+                else {
+                    asmgen.loadScaledArrayIndexIntoRegister(wordtarget.array!!, wordtarget.datatype, CpuRegister.Y)
+                    asmgen.out("""
+                        lda  $sourceName
+                        sta  ${wordtarget.asmVarname},y
+                        iny
+                        lda  #0
+                        sta  ${wordtarget.asmVarname},y""")
                 }
             }
             TargetStorageKind.REGISTER -> {
@@ -2841,95 +2698,47 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                 }
             }
             TargetStorageKind.ARRAY -> {
-                if(target.array!!.splitWords) {
-                    // assign to split lsb/msb word array
-                    if (target.constArrayIndexValue!=null) {
-                        val idx = target.constArrayIndexValue!!
-                        when (regs) {
-                            RegisterOrPair.AX -> asmgen.out("  sta  ${target.asmVarname}_lsb+$idx |  stx  ${target.asmVarname}_msb+$idx")
-                            RegisterOrPair.AY -> asmgen.out("  sta  ${target.asmVarname}_lsb+$idx |  sty  ${target.asmVarname}_msb+$idx")
-                            RegisterOrPair.XY -> asmgen.out("  stx  ${target.asmVarname}_lsb+$idx |  sty  ${target.asmVarname}_msb+$idx")
-                            in Cx16VirtualRegisters -> {
-                                val srcReg = asmgen.asmSymbolName(regs)
-                                asmgen.out("""
-                                    lda  $srcReg
-                                    sta  ${target.asmVarname}_lsb+$idx
-                                    lda  $srcReg+1
-                                    sta  ${target.asmVarname}_msb+$idx""")
-                            }
-                            else -> throw AssemblyError("expected reg pair or cx16 virtual 16-bit register")
-                        }
-                    }
-                    else {
-                        if (regs !in Cx16VirtualRegisters) {
-                            when (regs) {
-                                RegisterOrPair.AX -> asmgen.out("  pha |  txa |  pha")
-                                RegisterOrPair.AY -> asmgen.out("  pha |  tya |  pha")
-                                RegisterOrPair.XY -> asmgen.out("  txa |  pha |  tya |  pha")
-                                else -> throw AssemblyError("expected reg pair")
-                            }
-                            asmgen.loadScaledArrayIndexIntoRegister(target.array, DataType.UWORD, CpuRegister.Y)
-                            asmgen.out("""
-                                pla
-                                sta  ${target.asmVarname}_msb,y
-                                pla
-                                sta  ${target.asmVarname}_lsb,y""")
-                        } else {
+                if (target.constArrayIndexValue!=null) {
+                    val idx = target.constArrayIndexValue!! * 2u
+                    when (regs) {
+                        RegisterOrPair.AX -> asmgen.out("  sta  ${target.asmVarname}+$idx |  stx  ${target.asmVarname}+$idx+1")
+                        RegisterOrPair.AY -> asmgen.out("  sta  ${target.asmVarname}+$idx |  sty  ${target.asmVarname}+$idx+1")
+                        RegisterOrPair.XY -> asmgen.out("  stx  ${target.asmVarname}+$idx |  sty  ${target.asmVarname}+$idx+1")
+                        in Cx16VirtualRegisters -> {
                             val srcReg = asmgen.asmSymbolName(regs)
-                            asmgen.loadScaledArrayIndexIntoRegister(target.array, DataType.UWORD, CpuRegister.Y)
                             asmgen.out("""
                                 lda  $srcReg
-                                sta  ${target.asmVarname}_lsb,y
+                                sta  ${target.asmVarname}+$idx
                                 lda  $srcReg+1
-                                sta  ${target.asmVarname}_msb,y""")
+                                sta  ${target.asmVarname}+$idx+1""")
                         }
+                        else -> throw AssemblyError("expected reg pair or cx16 virtual 16-bit register")
                     }
-                } else {
-                    // assign to normal word array
-                    if (target.constArrayIndexValue!=null) {
-                        val idx = target.constArrayIndexValue!! * 2u
+                }
+                else {
+                    if (regs !in Cx16VirtualRegisters) {
                         when (regs) {
-                            RegisterOrPair.AX -> asmgen.out("  sta  ${target.asmVarname}+$idx |  stx  ${target.asmVarname}+$idx+1")
-                            RegisterOrPair.AY -> asmgen.out("  sta  ${target.asmVarname}+$idx |  sty  ${target.asmVarname}+$idx+1")
-                            RegisterOrPair.XY -> asmgen.out("  stx  ${target.asmVarname}+$idx |  sty  ${target.asmVarname}+$idx+1")
-                            in Cx16VirtualRegisters -> {
-                                val srcReg = asmgen.asmSymbolName(regs)
-                                asmgen.out("""
-                                    lda  $srcReg
-                                    sta  ${target.asmVarname}+$idx
-                                    lda  $srcReg+1
-                                    sta  ${target.asmVarname}+$idx+1""")
-                            }
-                            else -> throw AssemblyError("expected reg pair or cx16 virtual 16-bit register")
-                        }
-                    }
-                    else {
-                        if (regs !in Cx16VirtualRegisters) {
-                            when (regs) {
-                                RegisterOrPair.AX -> asmgen.out("  pha |  txa |  pha")
-                                RegisterOrPair.AY -> asmgen.out("  pha |  tya |  pha")
-                                RegisterOrPair.XY -> asmgen.out("  txa |  pha |  tya |  pha")
-                                else -> throw AssemblyError("expected reg pair")
-                            }
-                            asmgen.loadScaledArrayIndexIntoRegister(target.array, DataType.UWORD, CpuRegister.Y)
-                            asmgen.out("""
-                                iny
-                                pla
-                                sta  ${target.asmVarname},y
-                                dey
-                                pla
-                                sta  ${target.asmVarname},y""")
-                        } else {
-                            val srcReg = asmgen.asmSymbolName(regs)
-                            asmgen.loadScaledArrayIndexIntoRegister(target.array, DataType.UWORD, CpuRegister.Y)
-                            asmgen.out("""
-                                iny
-                                lda  $srcReg+1
-                                sta  ${target.asmVarname},y
-                                dey
-                                lda  $srcReg
-                                sta  ${target.asmVarname},y""")
+                            RegisterOrPair.AX -> asmgen.out("  pha |  txa |  pha")
+                            RegisterOrPair.AY -> asmgen.out("  pha |  tya |  pha")
+                            RegisterOrPair.XY -> asmgen.out("  txa |  pha |  tya |  pha")
+                            else -> throw AssemblyError("expected reg pair")
                         }
+                        asmgen.loadScaledArrayIndexIntoRegister(target.array!!, DataType.UWORD, CpuRegister.Y, true)
+                        asmgen.out("""
+                            pla
+                            sta  ${target.asmVarname},y
+                            dey
+                            pla
+                            sta  ${target.asmVarname},y""")
+                    } else {
+                        val srcReg = asmgen.asmSymbolName(regs)
+                        asmgen.loadScaledArrayIndexIntoRegister(target.array!!, DataType.UWORD, CpuRegister.Y, true)
+                        asmgen.out("""
+                            lda  $srcReg+1
+                            sta  ${target.asmVarname},y
+                            dey
+                            lda  $srcReg
+                            sta  ${target.asmVarname},y""")
                     }
                 }
             }
@@ -3024,16 +2833,11 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                 }
                 TargetStorageKind.ARRAY -> {
                     asmgen.loadScaledArrayIndexIntoRegister(target.array!!, DataType.UWORD, CpuRegister.Y)
-                    if(target.array.splitWords)
-                        asmgen.out("""
-                            lda  #0
-                            sta  ${target.asmVarname}_lsb,y
-                            sta  ${target.asmVarname}_msb,y""")
-                    else
-                        asmgen.out("""
-                            lda  #0
-                            sta  ${target.asmVarname},y
-                            sta  ${target.asmVarname}+1,y""")
+                    asmgen.out("""
+                        lda  #0
+                        sta  ${target.asmVarname},y
+                        sta  ${target.asmVarname}+1,y
+                    """)
                 }
                 TargetStorageKind.REGISTER -> {
                     when(target.register!!) {
@@ -3081,18 +2885,12 @@ internal class AssignmentAsmGen(private val program: PtProgram,
             }
             TargetStorageKind.ARRAY -> {
                 asmgen.loadScaledArrayIndexIntoRegister(target.array!!, DataType.UWORD, CpuRegister.Y)
-                if(target.array.splitWords)
-                    asmgen.out("""
-                        lda  #<${word.toHex()}
-                        sta  ${target.asmVarname}_lsb,y
-                        lda  #>${word.toHex()}
-                        sta  ${target.asmVarname}_msb,y""")
-                else
-                    asmgen.out("""
-                        lda  #<${word.toHex()}
-                        sta  ${target.asmVarname},y
-                        lda  #>${word.toHex()}
-                        sta  ${target.asmVarname}+1,y""")
+                asmgen.out("""
+                    lda  #<${word.toHex()}
+                    sta  ${target.asmVarname},y
+                    lda  #>${word.toHex()}
+                    sta  ${target.asmVarname}+1,y
+                """)
             }
             TargetStorageKind.REGISTER -> {
                 when(target.register!!) {
@@ -3150,14 +2948,12 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                         }
                         return
                     }
-                    if(target.array!!.splitWords)
-                        TODO("assign into split words ${target.position}")
                     if (target.constArrayIndexValue!=null) {
                         val indexValue = target.constArrayIndexValue!!
                         asmgen.out("  stz  ${target.asmVarname}+$indexValue")
                     }
                     else {
-                        asmgen.loadScaledArrayIndexIntoRegister(target.array, DataType.UBYTE, CpuRegister.Y)
+                        asmgen.loadScaledArrayIndexIntoRegister(target.array!!, DataType.UBYTE, CpuRegister.Y)
                         asmgen.out("  lda  #0 |  sta  ${target.asmVarname},y")
                     }
                 }
@@ -3208,14 +3004,12 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                     }
                     return
                 }
-                if(target.array!!.splitWords)
-                    TODO("assign into split words ${target.position}")
                 if (target.constArrayIndexValue!=null) {
                     val indexValue = target.constArrayIndexValue!!
                     asmgen.out("  lda  #${byte.toHex()} |  sta  ${target.asmVarname}+$indexValue")
                 }
                 else {
-                    asmgen.loadScaledArrayIndexIntoRegister(target.array, DataType.UBYTE, CpuRegister.Y)
+                    asmgen.loadScaledArrayIndexIntoRegister(target.array!!, DataType.UBYTE, CpuRegister.Y)
                     asmgen.out("  lda  #${byte.toHex()} |  sta  ${target.asmVarname},y")
                 }
             }
@@ -3485,13 +3279,6 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                     RegisterOrPair.AX -> asmgen.out("  ldx  #0 |  lda  ${address.toHex()}")
                     RegisterOrPair.AY -> asmgen.out("  ldy  #0 |  lda  ${address.toHex()}")
                     RegisterOrPair.XY -> asmgen.out("  ldy  #0 |  ldy  ${address.toHex()}")
-                    in Cx16VirtualRegisters -> {
-                        asmgen.out("  lda  ${address.toHex()} |  sta  cx16.${wordtarget.register.toString().lowercase()}")
-                        if(asmgen.isTargetCpu(CpuType.CPU65c02))
-                            asmgen.out("  stz  cx16.${wordtarget.register.toString().lowercase()}+1")
-                        else
-                            asmgen.out("  lda  #0 |  sta  cx16.${wordtarget.register.toString().lowercase()}+1")
-                    }
                     else -> throw AssemblyError("word regs can only be pair")
                 }
                 TargetStorageKind.STACK -> {
@@ -3524,13 +3311,6 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                         RegisterOrPair.AX -> asmgen.out("  ldx  #0")
                         RegisterOrPair.AY -> asmgen.out("  ldy  #0")
                         RegisterOrPair.XY -> asmgen.out("  tax |  ldy  #0")
-                        in Cx16VirtualRegisters -> {
-                            asmgen.out("  sta  cx16.${wordtarget.register.toString().lowercase()}")
-                            if(asmgen.isTargetCpu(CpuType.CPU65c02))
-                                asmgen.out("  stz  cx16.${wordtarget.register.toString().lowercase()}+1")
-                            else
-                                asmgen.out("  lda  #0 |  sta  cx16.${wordtarget.register.toString().lowercase()}+1")
-                        }
                         else -> throw AssemblyError("word regs can only be pair")
                     }
                 }
@@ -3575,6 +3355,7 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                 asmgen.storeAIntoPointerVar(addressExpr)
             }
             addressExpr is PtBinaryExpression -> {
+                require(!asmgen.options.useNewExprCode)
                 if(!asmgen.tryOptimizedPointerAccessWithA(addressExpr, addressExpr.operator, true))
                     storeViaExprEval()
             }
@@ -3698,18 +3479,11 @@ internal class AssignmentAsmGen(private val program: PtProgram,
             DataType.BYTE -> {
                 when (target.kind) {
                     TargetStorageKind.VARIABLE -> {
-                        if(asmgen.isTargetCpu(CpuType.CPU65c02))
-                            asmgen.out("""
-                                lda  ${target.asmVarname}
-                                eor  #255
-                                ina
-                                sta  ${target.asmVarname}""")
-                        else
-                            asmgen.out("""
-                                lda  #0
-                                sec
-                                sbc  ${target.asmVarname}
-                                sta  ${target.asmVarname}""")
+                        asmgen.out("""
+                            lda  #0
+                            sec
+                            sbc  ${target.asmVarname}
+                            sta  ${target.asmVarname}""")
                     }
                     TargetStorageKind.REGISTER -> {
                         when(target.register!!) {
@@ -3718,6 +3492,7 @@ internal class AssignmentAsmGen(private val program: PtProgram,
                                     asmgen.out("  eor  #255 |  ina")
                                 else
                                     asmgen.out("  eor  #255 |  clc |  adc  #1")
+
                             }
                             RegisterOrPair.X -> asmgen.out("  txa |  eor  #255 |  tax |  inx")
                             RegisterOrPair.Y -> asmgen.out("  tya |  eor  #255 |  tay |  iny")

codeGenCpu6502/src/prog8/codegen/cpu6502/assignment/AugmentableAssignmentAsmGen.kt

@@ -93,7 +93,8 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                             SourceStorageKind.ARRAY -> inplaceModification_word_value_to_variable(target.asmVarname, target.datatype, operator, value.array!!)
                             SourceStorageKind.EXPRESSION -> {
                                 if(value.expression is PtTypeCast) {
-                                    if (tryInplaceModifyWithRemovedRedundantCast(value.expression, target, operator)) return
+                                    if (tryInplaceModifyWithRemovedRedundantCast(value.expression, target, operator))
+                                        return
                                     inplaceModification_word_value_to_variable(target.asmVarname, target.datatype, operator, value.expression)
                                 }
                                 else {
@@ -177,6 +178,7 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                             SourceStorageKind.ARRAY -> inplaceModification_byte_value_to_variable("P8ZP_SCRATCH_B1", DataType.UBYTE, operator, value.array!!)
                             SourceStorageKind.EXPRESSION -> {
                                 if(value.expression is PtTypeCast) {
+                                    if (tryInplaceModifyWithRemovedRedundantCast(value.expression, target, operator)) return
                                     inplaceModification_byte_value_to_variable("P8ZP_SCRATCH_B1", DataType.UBYTE, operator, value.expression)
                                 } else {
                                     inplaceModification_byte_value_to_variable("P8ZP_SCRATCH_B1", DataType.UBYTE, operator, value.expression!!)
@@ -193,10 +195,7 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                 val indexVar = target.array.index as? PtIdentifier
                 when {
                     indexNum!=null -> {
-                        val targetVarName = if(target.array.splitWords)
-                            "${target.asmVarname} + ${indexNum.number.toInt()}"
-                        else
-                            "${target.asmVarname} + ${indexNum.number.toInt()*program.memsizer.memorySize(target.datatype)}"
+                        val targetVarName = "${target.asmVarname} + ${indexNum.number.toInt()*program.memsizer.memorySize(target.datatype)}"
                         when (target.datatype) {
                             in ByteDatatypes -> {
                                 when(value.kind) {
@@ -258,10 +257,6 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                     indexVar!=null -> {
                         when (target.datatype) {
                             in ByteDatatypes -> {
-                                if(value.kind==SourceStorageKind.EXPRESSION
-                                    && value.expression is PtTypeCast
-                                    && tryInplaceModifyWithRemovedRedundantCast(value.expression, target, operator))
-                                    return
                                 asmgen.loadScaledArrayIndexIntoRegister(target.array, DataType.UBYTE, CpuRegister.Y)
                                 asmgen.out("  lda  ${target.array.variable.name},y |  sta  P8ZP_SCRATCH_B1")
                                 asmgen.saveRegisterLocal(CpuRegister.Y, target.scope!!)
@@ -273,6 +268,8 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                                     SourceStorageKind.ARRAY -> inplaceModification_byte_value_to_variable("P8ZP_SCRATCH_B1", target.datatype, operator, value.array!!)
                                     SourceStorageKind.EXPRESSION -> {
                                         if(value.expression is PtTypeCast) {
+                                            if (tryInplaceModifyWithRemovedRedundantCast(value.expression, target, operator))
+                                                return
                                             inplaceModification_byte_value_to_variable("P8ZP_SCRATCH_B1", target.datatype, operator, value.expression)
                                         } else {
                                             inplaceModification_byte_value_to_variable("P8ZP_SCRATCH_B1", target.datatype, operator, value.expression!!)
@@ -284,19 +281,10 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                                 asmgen.out("  lda  P8ZP_SCRATCH_B1 |  sta  ${target.array.variable.name},y")
                             }
                             in WordDatatypes -> {
-                                if(value.kind==SourceStorageKind.EXPRESSION
-                                    && value.expression is PtTypeCast
-                                    && tryInplaceModifyWithRemovedRedundantCast(value.expression, target, operator))
-                                    return
                                 asmgen.loadScaledArrayIndexIntoRegister(target.array, DataType.UWORD, CpuRegister.Y)
-                                if(target.array.splitWords) {
-                                    asmgen.out("  lda  ${target.array.variable.name}_lsb,y |  sta  P8ZP_SCRATCH_W1")
-                                    asmgen.out("  lda  ${target.array.variable.name}_msb,y |  sta  P8ZP_SCRATCH_W1+1")
-                                } else {
-                                    asmgen.out("  lda  ${target.array.variable.name},y |  sta  P8ZP_SCRATCH_W1")
-                                    asmgen.out("  lda  ${target.array.variable.name}+1,y |  sta  P8ZP_SCRATCH_W1+1")
-                                }
-                                asmgen.saveRegisterStack(CpuRegister.Y, false)
+                                asmgen.out("  lda  ${target.array.variable.name},y |  sta  P8ZP_SCRATCH_W1")
+                                asmgen.out("  iny |  lda  ${target.array.variable.name},y |  sta  P8ZP_SCRATCH_W1+1")
+                                asmgen.saveRegisterLocal(CpuRegister.Y, target.scope!!)
                                 when(value.kind) {
                                     SourceStorageKind.LITERALNUMBER -> inplaceModification_word_litval_to_variable("P8ZP_SCRATCH_W1", target.datatype, operator, value.number!!.number.toInt())
                                     SourceStorageKind.VARIABLE -> inplaceModification_word_variable_to_variable("P8ZP_SCRATCH_W1", target.datatype, operator, value.asmVarname, value.datatype)
@@ -305,6 +293,8 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                                     SourceStorageKind.ARRAY -> inplaceModification_word_value_to_variable("P8ZP_SCRATCH_W1", target.datatype, operator, value.array!!)
                                     SourceStorageKind.EXPRESSION -> {
                                         if(value.expression is PtTypeCast) {
+                                            if (tryInplaceModifyWithRemovedRedundantCast(value.expression, target, operator))
+                                                return
                                             inplaceModification_word_value_to_variable("P8ZP_SCRATCH_W1", target.datatype, operator, value.expression)
                                         } else {
                                             inplaceModification_word_value_to_variable("P8ZP_SCRATCH_W1", target.datatype, operator, value.expression!!)
@@ -312,14 +302,9 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                                     }
                                     else -> throw AssemblyError("weird source type ${value.kind}")
                                 }
-                                asmgen.restoreRegisterStack(CpuRegister.Y, false)
-                                if(target.array.splitWords) {
-                                    asmgen.out("  lda  P8ZP_SCRATCH_W1 |  sta  ${target.array.variable.name}_lsb,y")
-                                    asmgen.out("  lda  P8ZP_SCRATCH_W1+1 |  sta  ${target.array.variable.name}_msb,y")
-                                } else {
-                                    asmgen.out("  lda  P8ZP_SCRATCH_W1 |  sta  ${target.array.variable.name},y")
-                                    asmgen.out("  lda  P8ZP_SCRATCH_W1+1 |  sta  ${target.array.variable.name}+1,y")
-                                }
+                                asmgen.restoreRegisterLocal(CpuRegister.Y)
+                                asmgen.out("  lda  P8ZP_SCRATCH_W1+1 |  sta  ${target.array.variable.name},y")
+                                asmgen.out("  lda  P8ZP_SCRATCH_W1 |  dey |  sta  ${target.array.variable.name},y")
                             }
                             DataType.FLOAT -> {
                                 asmgen.loadScaledArrayIndexIntoRegister(target.array, DataType.FLOAT, CpuRegister.A)
@@ -600,9 +585,8 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                 asmgen.out("  clc |  adc  $name |  sta  $name")
             }
             "-" -> {
-                val tmpByte = if(name!="P8ZP_SCRATCH_B1") "P8ZP_SCRATCH_B1" else "P8ZP_SCRATCH_REG"
-                asmgen.assignExpressionToVariable(value, tmpByte, dt)
-                asmgen.out(" lda  $name |  sec |  sbc  $tmpByte |  sta  $name")
+                asmgen.assignExpressionToVariable(value, "P8ZP_SCRATCH_B1", dt)
+                asmgen.out(" lda  $name |  sec |  sbc  P8ZP_SCRATCH_B1 |  sta  $name")
             }
             "*" -> {
                 asmgen.assignExpressionToRegister(value, RegisterOrPair.A)
@@ -1079,12 +1063,11 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
             }
             "-" -> {
                 asmgen.translateDirectMemReadExpressionToRegAorStack(memread, false)
-                val tmpByte = if(name!="P8ZP_SCRATCH_B1") "P8ZP_SCRATCH_B1" else "P8ZP_SCRATCH_REG"
                 asmgen.out("""
-                    sta  $tmpByte
+                    sta  P8ZP_SCRATCH_B1
                     lda  $name
                     sec
-                    sbc  $tmpByte
+                    sbc  P8ZP_SCRATCH_B1
                     sta  $name""")
             }
             "|" -> {
@@ -1119,12 +1102,11 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
             }
             "-" -> {
                 asmgen.translateDirectMemReadExpressionToRegAorStack(memread, false)
-                val tmpByte = if(name!="P8ZP_SCRATCH_B1") "P8ZP_SCRATCH_B1" else "P8ZP_SCRATCH_REG"
                 asmgen.out("""
-                    sta  $tmpByte
+                    sta  P8ZP_SCRATCH_B1
                     lda  $name
                     sec
-                    sbc  $tmpByte
+                    sbc  P8ZP_SCRATCH_B1
                     sta  $name
                     bcc  +
                     dec  $name+1
@@ -1221,8 +1203,10 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                         lda  #<$value
                         ldy  #>$value
                         jsr  math.multiply_words
+                        lda  math.multiply_words.result
                         sta  $name
-                        sty  $name+1""")
+                        lda  math.multiply_words.result+1
+                        sta  $name+1""")
                 }
             }
             "/" -> {
@@ -1680,8 +1664,10 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                                 lda  $name
                                 ldy  $name+1
                                 jsr  math.multiply_words
+                                lda  math.multiply_words.result
                                 sta  $name
-                                sty  $name+1""")
+                                lda  math.multiply_words.result+1
+                                sta  $name+1""")
                     }
                     "/" -> {
                         if(dt==DataType.UWORD) {
@@ -1818,8 +1804,11 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                             lda  $name
                             ldy  $name+1
                             jsr  math.multiply_words
+                            lda  math.multiply_words.result
                             sta  $name
-                            sty  $name+1""")
+                            lda  math.multiply_words.result+1
+                            sta  $name+1
+                        """)
                     }
                     "/" -> {
                         if(dt==DataType.WORD) {
@@ -1832,7 +1821,8 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                                 ldy  $otherName+1
                                 jsr  math.divmod_w_asm
                                 sta  $name
-                                sty  $name+1""")
+                                sty  $name+1
+                            """)
                         }
                         else {
                             asmgen.out("""
@@ -1844,7 +1834,8 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                                 ldy  $otherName+1
                                 jsr  math.divmod_uw_asm
                                 sta  $name
-                                sty  $name+1""")
+                                sty  $name+1
+                            """)
                         }
                     }
                     "%" -> {
@@ -2000,6 +1991,8 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
     private fun inplaceModification_word_value_to_variable(name: String, dt: DataType, operator: String, value: PtExpression) {
         // this should be the last resort for code generation for this,
         // because the value is evaluated onto the eval stack (=slow).
+
+
         fun multiplyVarByWordInAY() {
             asmgen.out("""
                 sta  P8ZP_SCRATCH_W1
@@ -2007,8 +2000,10 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                 lda  $name
                 ldy  $name+1
                 jsr  math.multiply_words
+                lda  math.multiply_words.result
                 sta  $name
-                sty  $name+1
+                lda  math.multiply_words.result+1
+                sta  $name+1
             """)
         }
 
@@ -2209,10 +2204,8 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
                         asmgen.out("  clc |  adc  $name |  sta  $name |  tya |  adc  $name+1 |  sta  $name+1")
                     }
                     "-" -> {
-                        val tmpWord = if(name!="P8ZP_SCRATCH_W1") "P8ZP_SCRATCH_W1" else "P8ZP_SCRATCH_W2"
-                        asmgen.assignExpressionToVariable(value, tmpWord, valueDt)
-                        asmgen.out(" lda  $name |  sec |  sbc  $tmpWord |  sta  $name |  lda  $name+1 |  sbc  $tmpWord+1 |  sta  $name+1")
-                        // TODO wrong signed word subtraction code??? ^^^
+                        asmgen.assignExpressionToVariable(value, "P8ZP_SCRATCH_W1", valueDt)
+                        asmgen.out(" lda  $name |  sec |  sbc  P8ZP_SCRATCH_W1 |  sta  $name |  lda  $name+1 |  sbc  P8ZP_SCRATCH_W1+1 |  sta  $name+1")
                     }
                     "*" -> {
                         asmgen.assignExpressionToRegister(value, RegisterOrPair.AY)

codeGenCpu6502/test/Dummies.kt

@@ -45,10 +45,6 @@ internal class ErrorReporterForTests(private val throwExceptionAtReportIfErrors:
             warnings.add(text)
     }
 
-    override fun undefined(symbol: List<String>, position: Position) {
-        err("undefined symbol: ${symbol.joinToString(".")}", position)
-    }
-
     override fun noErrors(): Boolean  = errors.isEmpty()
 
     override fun report() {

codeGenCpu6502/test/TestCodegen.kt

@@ -1,9 +1,7 @@
 package prog8tests.codegencpu6502
 
 import io.kotest.assertions.throwables.shouldNotThrowAny
-import io.kotest.assertions.withClue
 import io.kotest.core.spec.style.FunSpec
-import io.kotest.matchers.ints.shouldBeGreaterThanOrEqual
 import io.kotest.matchers.shouldBe
 import prog8.code.SymbolTableMaker
 import prog8.code.ast.*
@@ -42,9 +40,9 @@ class TestCodegen: FunSpec({
 //        xx += cx16.r0
 //    }
 //}
-        val codegen = AsmGen6502(prefixSymbols = false)
+        val codegen = AsmGen6502()
         val program = PtProgram("test", DummyMemsizer, DummyStringEncoder)
-        val block = PtBlock("main", null, false, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
+        val block = PtBlock("main", null, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
         val sub = PtSub("start", emptyList(), null, Position.DUMMY)
         sub.add(PtVariable("pi", DataType.UBYTE, ZeropageWish.DONTCARE, PtNumber(DataType.UBYTE, 0.0, Position.DUMMY), null, Position.DUMMY))
         sub.add(PtVariable("particleX", DataType.ARRAY_UB, ZeropageWish.DONTCARE, null, 3u, Position.DUMMY))
@@ -94,7 +92,7 @@ class TestCodegen: FunSpec({
         program.add(block)
 
         // define the "cx16.r0" virtual register
-        val cx16block = PtBlock("cx16", null, false, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
+        val cx16block = PtBlock("cx16", null, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
         cx16block.add(PtMemMapped("r0", DataType.UWORD, 100u, null, Position.DUMMY))
         program.add(cx16block)
 
@@ -109,19 +107,9 @@ class TestCodegen: FunSpec({
     test("64tass assembler available? - if this fails you need to install 64tass in the path") {
         val command = mutableListOf("64tass", "--version")
         shouldNotThrowAny {
-            val proc = ProcessBuilder(command).start()
-            val output = String(proc.inputStream.readBytes())
+            val proc = ProcessBuilder(command).inheritIO().start()
             val result = proc.waitFor()
             result.shouldBe(0)
-            val (_, version) = output.split('V')
-            val (major, minor, _) = version.split('.')
-            val majorNum = major.toInt()
-            val minorNum = minor.toInt()
-            withClue("64tass version should be 1.58 or newer") {
-                majorNum shouldBeGreaterThanOrEqual 1
-                if (majorNum == 1)
-                    minorNum shouldBeGreaterThanOrEqual 58
-            }
         }
     }
 })

codeGenExperimental/build.gradle

@@ -29,7 +29,7 @@ dependencies {
     implementation project(':codeGenIntermediate')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
     // implementation "org.jetbrains.kotlin:kotlin-reflect"
-    implementation "com.michael-bull.kotlin-result:kotlin-result-jvm:1.1.18"
+    implementation "com.michael-bull.kotlin-result:kotlin-result-jvm:1.1.16"
 
 }
 

codeGenExperimental/src/prog8/codegen/experimental/ExperiCodeGen.kt

@@ -26,15 +26,6 @@ class ExperiCodeGen: ICodeGeneratorBackend {
         IRFileWriter(irProgram, null).write()
 
         println("** experimental codegen stub: no assembly generated **")
-        return EmptyProgram
+        return null
     }
-}
-
-private object EmptyProgram : IAssemblyProgram {
-    override val name = "<Empty Program>"
-    override fun assemble(options: CompilationOptions, errors: IErrorReporter): Boolean {
-        println("** nothing assembled **")
-        return true
-    }
-
-}
+}

codeGenIntermediate/build.gradle

@@ -28,9 +28,9 @@ dependencies {
     implementation project(':intermediate')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
     // implementation "org.jetbrains.kotlin:kotlin-reflect"
-    implementation "com.michael-bull.kotlin-result:kotlin-result-jvm:1.1.18"
+    implementation "com.michael-bull.kotlin-result:kotlin-result-jvm:1.1.16"
 
-    testImplementation 'io.kotest:kotest-runner-junit5-jvm:5.6.2'
+    testImplementation 'io.kotest:kotest-runner-junit5-jvm:5.5.5'
 }
 
 sourceSets {

codeGenIntermediate/src/prog8/codegen/intermediate/AssignmentGen.kt

@@ -104,10 +104,27 @@ internal class AssignmentGen(private val codeGen: IRCodeGen, private val express
             value.add(origAssign.value)
         } else {
             require(origAssign.operator.endsWith('='))
-            value = PtBinaryExpression(origAssign.operator.dropLast(1), origAssign.value.type, origAssign.value.position)
-            val left: PtExpression = origAssign.target.children.single() as PtExpression
-            value.add(left)
-            value.add(origAssign.value)
+            if(codeGen.options.useNewExprCode) {
+                // X += Y  ->   temp = X,  temp += Y,  X = temp
+                val tempvar = codeGen.getReusableTempvar(origAssign.definingSub()!!, origAssign.target.type)
+                val assign = PtAssignment(origAssign.position)
+                val target = PtAssignTarget(origAssign.position)
+                target.add(tempvar)
+                assign.add(target)
+                assign.add(origAssign.target.children.single())
+                val augAssign = PtAugmentedAssign(origAssign.operator, origAssign.position)
+                augAssign.add(target)
+                augAssign.add(origAssign.value)
+                val assignBack = PtAssignment(origAssign.position)
+                assignBack.add(origAssign.target)
+                assignBack.add(tempvar)
+                return translateRegularAssign(assign) + translate(augAssign) + translateRegularAssign(assignBack)
+            } else {
+                value = PtBinaryExpression(origAssign.operator.dropLast(1), origAssign.value.type, origAssign.value.position)
+                val left: PtExpression = origAssign.target.children.single() as PtExpression
+                value.add(left)
+                value.add(origAssign.value)
+            }
         }
         val normalAssign = PtAssignment(origAssign.position)
         normalAssign.add(origAssign.target)
@@ -167,18 +184,15 @@ internal class AssignmentGen(private val codeGen: IRCodeGen, private val express
                 } else false
                 if (assignment.value is PtMachineRegister) {
                     valueRegister = (assignment.value as PtMachineRegister).register
-                    if(extendByteToWord) {
-                        valueRegister = codeGen.registers.nextFree()
-                        addInstr(result, IRInstruction(Opcode.EXT, IRDataType.BYTE, reg1=valueRegister, reg2=(assignment.value as PtMachineRegister).register), null)
-                    }
+                    if(extendByteToWord)
+                        addInstr(result, IRInstruction(Opcode.EXT, IRDataType.BYTE, reg1=valueRegister), null)
                 } else {
                     val tr = expressionEval.translateExpression(assignment.value)
                     valueRegister = tr.resultReg
                     addToResult(result, tr, valueRegister, -1)
                     if(extendByteToWord) {
-                        valueRegister = codeGen.registers.nextFree()
                         val opcode = if(assignment.value.type in SignedDatatypes) Opcode.EXTS else Opcode.EXT
-                        addInstr(result, IRInstruction(opcode, IRDataType.BYTE, reg1=valueRegister, reg2=tr.resultReg), null)
+                        addInstr(result, IRInstruction(opcode, IRDataType.BYTE, reg1 = valueRegister), null)
                     }
                 }
             }
@@ -221,71 +235,36 @@ internal class AssignmentGen(private val codeGen: IRCodeGen, private val express
             }
 
             val fixedIndex = constIntValue(targetArray.index)
-            val arrayLength = codeGen.symbolTable.getLength(targetArray.variable.name)
             if(zero) {
                 if(fixedIndex!=null) {
-                    val chunk = IRCodeChunk(null, null).also {
-                        if(targetArray.splitWords) {
-                            it += IRInstruction(Opcode.STOREZM, IRDataType.BYTE, immediate = arrayLength, labelSymbol = "${variable}_lsb+$fixedIndex")
-                            it += IRInstruction(Opcode.STOREZM, IRDataType.BYTE, immediate = arrayLength, labelSymbol = "${variable}_msb+$fixedIndex")
-                        }
-                        else
-                            it += IRInstruction(Opcode.STOREZM, targetDt, labelSymbol = "$variable+${fixedIndex*itemsize}")
-                    }
+                    val offset = fixedIndex*itemsize
+                    val chunk = IRCodeChunk(null, null).also { it += IRInstruction(Opcode.STOREZM, targetDt, labelSymbol = "$variable+$offset") }
                     result += chunk
                 } else {
                     val (code, indexReg) = loadIndexReg(targetArray, itemsize)
                     result += code
-                    result += IRCodeChunk(null, null).also {
-                        if(targetArray.splitWords) {
-                            it += IRInstruction(Opcode.STOREZX, IRDataType.BYTE, reg1 = indexReg, immediate = arrayLength, labelSymbol = variable+"_lsb")
-                            it += IRInstruction(Opcode.STOREZX, IRDataType.BYTE, reg1 = indexReg, immediate = arrayLength, labelSymbol = variable+"_msb")
-                        }
-                        else
-                            it += IRInstruction(Opcode.STOREZX, targetDt, reg1=indexReg, labelSymbol = variable)
-                    }
+                    result += IRCodeChunk(null, null).also { it += IRInstruction(Opcode.STOREZX, targetDt, reg1=indexReg, labelSymbol = variable) }
                 }
             } else {
                 if(targetDt== IRDataType.FLOAT) {
                     if(fixedIndex!=null) {
                         val offset = fixedIndex*itemsize
-                        val chunk = IRCodeChunk(null, null).also {
-                            it += IRInstruction(Opcode.STOREM, targetDt, fpReg1 = valueFpRegister, labelSymbol = "$variable+$offset")
-                        }
+                        val chunk = IRCodeChunk(null, null).also { it += IRInstruction(Opcode.STOREM, targetDt, fpReg1 = valueFpRegister, labelSymbol = "$variable+$offset") }
                         result += chunk
                     } else {
                         val (code, indexReg) = loadIndexReg(targetArray, itemsize)
                         result += code
-                        result += IRCodeChunk(null, null).also {
-                            it += IRInstruction(Opcode.STOREX, targetDt, reg1 = indexReg, fpReg1 = valueFpRegister, labelSymbol = variable)
-                        }
+                        result += IRCodeChunk(null, null).also { it += IRInstruction(Opcode.STOREX, targetDt, reg1 = indexReg, fpReg1 = valueFpRegister, labelSymbol = variable) }
                     }
                 } else {
                     if(fixedIndex!=null) {
-                        val chunk = IRCodeChunk(null, null).also {
-                            if(targetArray.splitWords) {
-                                val msbReg = codeGen.registers.nextFree()
-                                it += IRInstruction(Opcode.STOREM, IRDataType.BYTE, reg1 = valueRegister, immediate = arrayLength, labelSymbol = "${variable}_lsb+$fixedIndex")
-                                it += IRInstruction(Opcode.MSIG, IRDataType.BYTE, reg1 = msbReg, reg2 = valueRegister)
-                                it += IRInstruction(Opcode.STOREM, IRDataType.BYTE, reg1 = msbReg, immediate = arrayLength, labelSymbol = "${variable}_msb+$fixedIndex")
-                            }
-                            else
-                                it += IRInstruction(Opcode.STOREM, targetDt, reg1 = valueRegister, labelSymbol = "$variable+${fixedIndex*itemsize}")
-                        }
+                        val offset = fixedIndex*itemsize
+                        val chunk = IRCodeChunk(null, null).also { it += IRInstruction(Opcode.STOREM, targetDt, reg1 = valueRegister, labelSymbol = "$variable+$offset") }
                         result += chunk
                     } else {
                         val (code, indexReg) = loadIndexReg(targetArray, itemsize)
                         result += code
-                        result += IRCodeChunk(null, null).also {
-                            if(targetArray.splitWords) {
-                                val msbReg = codeGen.registers.nextFree()
-                                it += IRInstruction(Opcode.STOREX, IRDataType.BYTE, reg1 = valueRegister, reg2=indexReg, immediate = arrayLength, labelSymbol = "${variable}_lsb")
-                                it += IRInstruction(Opcode.MSIG, IRDataType.BYTE, reg1 = msbReg, reg2 = valueRegister)
-                                it += IRInstruction(Opcode.STOREX, IRDataType.BYTE, reg1 = msbReg, reg2=indexReg, immediate = arrayLength, labelSymbol = "${variable}_msb")
-                            }
-                            else
-                                it += IRInstruction(Opcode.STOREX, targetDt, reg1 = valueRegister, reg2=indexReg, labelSymbol = variable)
-                        }
+                        result += IRCodeChunk(null, null).also { it += IRInstruction(Opcode.STOREX, targetDt, reg1 = valueRegister, reg2=indexReg, labelSymbol = variable) }
                     }
                 }
             }
@@ -322,21 +301,28 @@ internal class AssignmentGen(private val codeGen: IRCodeGen, private val express
     }
 
     private fun loadIndexReg(array: PtArrayIndexer, itemsize: Int): Pair<IRCodeChunks, Int> {
-        // returns the code to load the Index into the register, which is also returned.
+        // returns the code to load the Index into the register, which is also return\ed.
 
         val result = mutableListOf<IRCodeChunkBase>()
-        if(itemsize==1 || array.splitWords) {
+        if(itemsize==1) {
             val tr = expressionEval.translateExpression(array.index)
             addToResult(result, tr, tr.resultReg, -1)
             return Pair(result, tr.resultReg)
         }
 
-        val mult: PtExpression
-        mult = PtBinaryExpression("*", DataType.UBYTE, array.position)
-        mult.children += array.index
-        mult.children += PtNumber(DataType.UBYTE, itemsize.toDouble(), array.position)
-        val tr = expressionEval.translateExpression(mult)
-        addToResult(result, tr, tr.resultReg, -1)
-        return Pair(result, tr.resultReg)
+        if(codeGen.options.useNewExprCode) {
+            val tr = expressionEval.translateExpression(array.index)
+            result += tr.chunks
+            addInstr(result, IRInstruction(Opcode.MUL, tr.dt, reg1=tr.resultReg, immediate = itemsize), null)
+            return Pair(result, tr.resultReg)
+        } else {
+            val mult: PtExpression
+            mult = PtBinaryExpression("*", DataType.UBYTE, array.position)
+            mult.children += array.index
+            mult.children += PtNumber(DataType.UBYTE, itemsize.toDouble(), array.position)
+            val tr = expressionEval.translateExpression(mult)
+            addToResult(result, tr, tr.resultReg, -1)
+            return Pair(result, tr.resultReg)
+        }
     }
 }

codeGenIntermediate/src/prog8/codegen/intermediate/BuiltinFuncGen.kt

@@ -1,10 +1,9 @@
 package prog8.codegen.intermediate
 
+import prog8.code.StStaticVariable
 import prog8.code.ast.*
 import prog8.code.core.AssemblyError
 import prog8.code.core.DataType
-import prog8.code.core.SignedDatatypes
-import prog8.code.core.SplitWordArrayTypes
 import prog8.intermediate.*
 
 
@@ -14,12 +13,12 @@ internal class BuiltinFuncGen(private val codeGen: IRCodeGen, private val exprGe
         return when(call.name) {
             "any" -> funcAny(call)
             "all" -> funcAll(call)
-            "abs__byte", "abs__word", "abs__float" -> funcAbs(call)
+            "abs" -> funcAbs(call)
             "cmp" -> funcCmp(call)
             "sgn" -> funcSgn(call)
-            "sqrt__ubyte", "sqrt__uword", "sqrt__float" -> funcSqrt(call)
-            "divmod__ubyte" -> funcDivmod(call, IRDataType.BYTE)
-            "divmod__uword" -> funcDivmod(call, IRDataType.WORD)
+            "sqrt16" -> funcSqrt16(call)
+            "divmod" -> funcDivmod(call, IRDataType.BYTE)
+            "divmodw" -> funcDivmod(call, IRDataType.WORD)
             "pop" -> funcPop(call)
             "popw" -> funcPopw(call)
             "push" -> funcPush(call)
@@ -28,7 +27,7 @@ internal class BuiltinFuncGen(private val codeGen: IRCodeGen, private val exprGe
             "rsavex",
             "rrestore",
             "rrestorex" -> ExpressionCodeResult.EMPTY  // vm doesn't have registers to save/restore
-            "callfar" -> funcCallfar(call)
+            "callfar" -> throw AssemblyError("callfar() is for cx16 target only")
             "msb" -> funcMsb(call)
             "lsb" -> funcLsb(call)
             "memory" -> funcMemory(call)
@@ -38,9 +37,6 @@ internal class BuiltinFuncGen(private val codeGen: IRCodeGen, private val exprGe
             "pokew" -> funcPokeW(call)
             "pokemon" -> ExpressionCodeResult.EMPTY     // easter egg function
             "mkword" -> funcMkword(call)
-            "clamp__byte", "clamp__ubyte", "clamp__word", "clamp__uword" -> funcClamp(call)
-            "min__byte", "min__ubyte", "min__word", "min__uword" -> funcMin(call)
-            "max__byte", "max__ubyte", "max__word", "max__uword" -> funcMax(call)
             "sort" -> funcSort(call)
             "reverse" -> funcReverse(call)
             "rol" -> funcRolRor(Opcode.ROXL, call)
@@ -52,18 +48,6 @@ internal class BuiltinFuncGen(private val codeGen: IRCodeGen, private val exprGe
         }
     }
 
-    private fun funcCallfar(call: PtBuiltinFunctionCall): ExpressionCodeResult {
-        val result = mutableListOf<IRCodeChunkBase>()
-        val bankTr = exprGen.translateExpression(call.args[0])
-        val addressTr = exprGen.translateExpression(call.args[1])
-        val argumentwordTr = exprGen.translateExpression(call.args[2])
-        addToResult(result, bankTr, bankTr.resultReg, -1)
-        addToResult(result, addressTr, addressTr.resultReg, -1)
-        addToResult(result, argumentwordTr, argumentwordTr.resultReg, -1)
-        result += codeGen.makeSyscall(IMSyscall.CALLFAR, listOf(IRDataType.BYTE to bankTr.resultReg, IRDataType.WORD to addressTr.resultReg, IRDataType.WORD to argumentwordTr.resultReg), IRDataType.WORD to argumentwordTr.resultReg)
-        return ExpressionCodeResult(result, IRDataType.WORD, argumentwordTr.resultReg, -1)
-    }
-
     private fun funcDivmod(call: PtBuiltinFunctionCall, type: IRDataType): ExpressionCodeResult {
         val result = mutableListOf<IRCodeChunkBase>()
         val number = call.args[0]
@@ -118,9 +102,9 @@ internal class BuiltinFuncGen(private val codeGen: IRCodeGen, private val exprGe
 
     private fun funcAny(call: PtBuiltinFunctionCall): ExpressionCodeResult {
         val arrayName = call.args[0] as PtIdentifier
-        val arrayLength = codeGen.symbolTable.getLength(arrayName.name)
+        val array = codeGen.symbolTable.flat.getValue(arrayName.name) as StStaticVariable
         val syscall =
-            when (arrayName.type) {
+            when (array.dt) {
                 DataType.ARRAY_UB,
                 DataType.ARRAY_B -> IMSyscall.ANY_BYTE
                 DataType.ARRAY_UW,
@@ -132,16 +116,16 @@ internal class BuiltinFuncGen(private val codeGen: IRCodeGen, private val exprGe
         val tr = exprGen.translateExpression(call.args[0])
         addToResult(result, tr, tr.resultReg, -1)
         val lengthReg = codeGen.registers.nextFree()
-        addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1 = lengthReg, immediate = arrayLength), null)
+        addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1 = lengthReg, immediate = array.length), null)
         result += codeGen.makeSyscall(syscall, listOf(IRDataType.WORD to tr.resultReg, IRDataType.BYTE to lengthReg), IRDataType.BYTE to tr.resultReg)
         return ExpressionCodeResult(result, IRDataType.BYTE, tr.resultReg, -1)
     }
 
     private fun funcAll(call: PtBuiltinFunctionCall): ExpressionCodeResult {
         val arrayName = call.args[0] as PtIdentifier
-        val arrayLength = codeGen.symbolTable.getLength(arrayName.name)
+        val array = codeGen.symbolTable.flat.getValue(arrayName.name) as StStaticVariable
         val syscall =
-            when(arrayName.type) {
+            when(array.dt) {
                 DataType.ARRAY_UB,
                 DataType.ARRAY_B -> IMSyscall.ALL_BYTE
                 DataType.ARRAY_UW,
@@ -153,7 +137,7 @@ internal class BuiltinFuncGen(private val codeGen: IRCodeGen, private val exprGe
         val tr = exprGen.translateExpression(call.args[0])
         addToResult(result, tr, tr.resultReg, -1)
         val lengthReg = codeGen.registers.nextFree()
-        addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1 = lengthReg, immediate = arrayLength), null)
+        addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1 = lengthReg, immediate = array.length), null)
         result += codeGen.makeSyscall(syscall, listOf(IRDataType.WORD to tr.resultReg, IRDataType.BYTE to lengthReg), IRDataType.BYTE to tr.resultReg)
         return ExpressionCodeResult(result, IRDataType.BYTE, tr.resultReg, -1)
     }
@@ -167,13 +151,21 @@ internal class BuiltinFuncGen(private val codeGen: IRCodeGen, private val exprGe
         val tr = exprGen.translateExpression(call.args[0])
         addToResult(result, tr, tr.resultReg, -1)
         when (sourceDt) {
+            DataType.UBYTE -> {
+                result += IRCodeChunk(null, null).also {
+                    it += IRInstruction(Opcode.EXT, IRDataType.BYTE, reg1 = tr.resultReg)
+                }
+                return ExpressionCodeResult(result, IRDataType.BYTE, tr.resultReg, -1)
+            }
             DataType.BYTE -> {
                 val notNegativeLabel = codeGen.createLabelName()
                 val compareReg = codeGen.registers.nextFree()
                 result += IRCodeChunk(null, null).also {
                     it += IRInstruction(Opcode.LOADR, IRDataType.BYTE, reg1=compareReg, reg2=tr.resultReg)
-                    it += IRInstruction(Opcode.BSTPOS, labelSymbol = notNegativeLabel)
+                    it += IRInstruction(Opcode.AND, IRDataType.BYTE, reg1=compareReg, immediate = 0x80)
+                    it += IRInstruction(Opcode.BEQ, IRDataType.BYTE, reg1=compareReg, immediate = 0, labelSymbol = notNegativeLabel)
                     it += IRInstruction(Opcode.NEG, IRDataType.BYTE, reg1=tr.resultReg)
+                    it += IRInstruction(Opcode.EXT, IRDataType.BYTE, reg1=tr.resultReg)
                 }
                 result += IRCodeChunk(notNegativeLabel, null)
                 return ExpressionCodeResult(result, IRDataType.BYTE, tr.resultReg, -1)
@@ -183,18 +175,14 @@ internal class BuiltinFuncGen(private val codeGen: IRCodeGen, private val exprGe
                 val compareReg = codeGen.registers.nextFree()
                 result += IRCodeChunk(null, null).also {
                     it += IRInstruction(Opcode.LOADR, IRDataType.WORD, reg1=compareReg, reg2=tr.resultReg)
-                    it += IRInstruction(Opcode.BSTPOS, labelSymbol = notNegativeLabel)
+                    it += IRInstruction(Opcode.AND, IRDataType.WORD, reg1=compareReg, immediate = 0x8000)
+                    it += IRInstruction(Opcode.BEQ, IRDataType.WORD, reg1=compareReg, immediate = 0, labelSymbol = notNegativeLabel)
                     it += IRInstruction(Opcode.NEG, IRDataType.WORD, reg1=tr.resultReg)
                 }
                 result += IRCodeChunk(notNegativeLabel, null)
                 return ExpressionCodeResult(result, IRDataType.WORD, tr.resultReg, -1)
             }
-            DataType.FLOAT -> {
-                val resultFpReg = codeGen.registers.nextFreeFloat()
-                addInstr(result, IRInstruction(Opcode.FABS, IRDataType.FLOAT, fpReg1 = resultFpReg, fpReg2 = tr.resultFpReg), null)
-                return ExpressionCodeResult(result, IRDataType.FLOAT, -1, resultFpReg)
-            }
-            else -> throw AssemblyError("weird dt")
+            else -> throw AssemblyError("weird type")
         }
     }
 
@@ -210,37 +198,15 @@ internal class BuiltinFuncGen(private val codeGen: IRCodeGen, private val exprGe
         return ExpressionCodeResult(result, vmDt, resultReg, -1)
     }
 
-    private fun funcSqrt(call: PtBuiltinFunctionCall): ExpressionCodeResult {
+    private fun funcSqrt16(call: PtBuiltinFunctionCall): ExpressionCodeResult {
         val result = mutableListOf<IRCodeChunkBase>()
         val tr = exprGen.translateExpression(call.args.single())
-        val dt = call.args[0].type
-        when(dt) {
-            DataType.UBYTE -> {
-                addToResult(result, tr, tr.resultReg, -1)
-                val resultReg = codeGen.registers.nextFree()
-                result += IRCodeChunk(null, null).also {
-                    it += IRInstruction(Opcode.SQRT, IRDataType.BYTE, reg1=resultReg, reg2=tr.resultReg)
-                }
-                return ExpressionCodeResult(result, IRDataType.BYTE, resultReg, -1)
-            }
-            DataType.UWORD -> {
-                addToResult(result, tr, tr.resultReg, -1)
-                val resultReg = codeGen.registers.nextFree()
-                result += IRCodeChunk(null, null).also {
-                    it += IRInstruction(Opcode.SQRT, IRDataType.WORD, reg1=resultReg, reg2=tr.resultReg)
-                }
-                return ExpressionCodeResult(result, IRDataType.WORD, resultReg, -1)
-            }
-            DataType.FLOAT -> {
-                addToResult(result, tr, -1, tr.resultFpReg)
-                val resultFpReg = codeGen.registers.nextFreeFloat()
-                result += IRCodeChunk(null, null).also {
-                    it += IRInstruction(Opcode.SQRT, IRDataType.FLOAT, fpReg1 = resultFpReg, fpReg2 = tr.resultFpReg)
-                }
-                return ExpressionCodeResult(result, IRDataType.FLOAT, -1, resultFpReg)
-            }
-            else -> throw AssemblyError("invalid dt for sqrt")
+        addToResult(result, tr, tr.resultReg, -1)
+        val resultReg = codeGen.registers.nextFree()
+        result += IRCodeChunk(null, null).also {
+            it += IRInstruction(Opcode.SQRT, IRDataType.WORD, reg1=resultReg, reg2=tr.resultReg)
         }
+        return ExpressionCodeResult(result, IRDataType.WORD, resultReg, -1)
     }
 
     private fun funcPop(call: PtBuiltinFunctionCall): ExpressionCodeResult {
@@ -283,43 +249,41 @@ internal class BuiltinFuncGen(private val codeGen: IRCodeGen, private val exprGe
 
     private fun funcReverse(call: PtBuiltinFunctionCall): ExpressionCodeResult {
         val arrayName = call.args[0] as PtIdentifier
-        val arrayLength = codeGen.symbolTable.getLength(arrayName.name)
+        val array = codeGen.symbolTable.flat.getValue(arrayName.name) as StStaticVariable
         val syscall =
-            when(arrayName.type) {
+            when(array.dt) {
                 DataType.ARRAY_UB, DataType.ARRAY_B, DataType.STR -> IMSyscall.REVERSE_BYTES
                 DataType.ARRAY_UW, DataType.ARRAY_W -> IMSyscall.REVERSE_WORDS
                 DataType.ARRAY_F -> IMSyscall.REVERSE_FLOATS
-                in SplitWordArrayTypes -> TODO("split word reverse")
                 else -> throw IllegalArgumentException("weird type to reverse")
             }
         val result = mutableListOf<IRCodeChunkBase>()
         val tr = exprGen.translateExpression(call.args[0])
         addToResult(result, tr, tr.resultReg, -1)
         val lengthReg = codeGen.registers.nextFree()
-        addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1 = lengthReg, immediate = if(arrayName.type==DataType.STR) arrayLength!!-1 else arrayLength), null)
+        addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1 = lengthReg, immediate = if(array.dt==DataType.STR) array.length!!-1 else array.length), null)
         result += codeGen.makeSyscall(syscall, listOf(IRDataType.WORD to tr.resultReg, IRDataType.BYTE to lengthReg), null)
         return ExpressionCodeResult(result, IRDataType.BYTE, -1, -1)
     }
 
     private fun funcSort(call: PtBuiltinFunctionCall): ExpressionCodeResult {
         val arrayName = call.args[0] as PtIdentifier
-        val arrayLength = codeGen.symbolTable.getLength(arrayName.name)
+        val array = codeGen.symbolTable.flat.getValue(arrayName.name) as StStaticVariable
         val syscall =
-            when(arrayName.type) {
+            when(array.dt) {
                 DataType.ARRAY_UB -> IMSyscall.SORT_UBYTE
                 DataType.ARRAY_B -> IMSyscall.SORT_BYTE
                 DataType.ARRAY_UW -> IMSyscall.SORT_UWORD
                 DataType.ARRAY_W -> IMSyscall.SORT_WORD
                 DataType.STR -> IMSyscall.SORT_UBYTE
                 DataType.ARRAY_F -> throw IllegalArgumentException("sorting a floating point array is not supported")
-                in SplitWordArrayTypes -> TODO("split word sort")
                 else -> throw IllegalArgumentException("weird type to sort")
             }
         val result = mutableListOf<IRCodeChunkBase>()
         val tr = exprGen.translateExpression(call.args[0])
         addToResult(result, tr, tr.resultReg, -1)
         val lengthReg = codeGen.registers.nextFree()
-        addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1 = lengthReg, immediate = if(arrayName.type==DataType.STR) arrayLength!!-1 else arrayLength), null)
+        addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1 = lengthReg, immediate = if(array.dt==DataType.STR) array.length!!-1 else array.length), null)
         result += codeGen.makeSyscall(syscall, listOf(IRDataType.WORD to tr.resultReg, IRDataType.BYTE to lengthReg), null)
         return ExpressionCodeResult(result, IRDataType.BYTE, -1, -1)
     }
@@ -330,85 +294,10 @@ internal class BuiltinFuncGen(private val codeGen: IRCodeGen, private val exprGe
         addToResult(result, msbTr, msbTr.resultReg, -1)
         val lsbTr = exprGen.translateExpression(call.args[1])
         addToResult(result, lsbTr, lsbTr.resultReg, -1)
-        val resultReg = codeGen.registers.nextFree()
         result += IRCodeChunk(null, null).also {
-            it += IRInstruction(Opcode.CONCAT, IRDataType.BYTE, reg1=resultReg, reg2 = lsbTr.resultReg, reg3 = msbTr.resultReg)
+            it += IRInstruction(Opcode.CONCAT, IRDataType.BYTE, reg1 = lsbTr.resultReg, reg2 = msbTr.resultReg)
         }
-        return ExpressionCodeResult(result, IRDataType.WORD, resultReg, -1)
-    }
-
-    private fun funcClamp(call: PtBuiltinFunctionCall): ExpressionCodeResult {
-        val result = mutableListOf<IRCodeChunkBase>()
-        val type = irType(call.type)
-        val valueTr = exprGen.translateExpression(call.args[0])
-        val minimumTr = exprGen.translateExpression(call.args[1])
-        val maximumTr = exprGen.translateExpression(call.args[2])
-        result += valueTr.chunks
-        result += minimumTr.chunks
-        result += maximumTr.chunks
-        if(type==IRDataType.FLOAT) {
-            result += codeGen.makeSyscall(
-                IMSyscall.CLAMP_FLOAT, listOf(
-                    valueTr.dt to valueTr.resultFpReg,
-                    minimumTr.dt to minimumTr.resultFpReg,
-                    maximumTr.dt to maximumTr.resultFpReg,
-                ), type to valueTr.resultFpReg
-            )
-            return ExpressionCodeResult(result, type, -1, valueTr.resultFpReg)
-        } else {
-            val syscall = when(call.type) {
-                DataType.UBYTE -> IMSyscall.CLAMP_UBYTE
-                DataType.BYTE -> IMSyscall.CLAMP_BYTE
-                DataType.UWORD -> IMSyscall.CLAMP_UWORD
-                DataType.WORD -> IMSyscall.CLAMP_WORD
-                else -> throw AssemblyError("invalid dt")
-            }
-            result += codeGen.makeSyscall(syscall, listOf(
-                    valueTr.dt to valueTr.resultReg,
-                    minimumTr.dt to minimumTr.resultReg,
-                    maximumTr.dt to maximumTr.resultReg,
-                ), type to valueTr.resultReg
-            )
-            return ExpressionCodeResult(result, type, valueTr.resultReg, -1)
-        }
-    }
-
-    private fun funcMin(call: PtBuiltinFunctionCall): ExpressionCodeResult {
-        val type = irType(call.type)
-        val result = mutableListOf<IRCodeChunkBase>()
-        val leftTr = exprGen.translateExpression(call.args[0])
-        addToResult(result, leftTr, leftTr.resultReg, -1)
-        val rightTr = exprGen.translateExpression(call.args[1])
-        addToResult(result, rightTr, rightTr.resultReg, -1)
-        val comparisonOpcode = if(call.type in SignedDatatypes) Opcode.BGTSR else Opcode.BGTR
-        val after = codeGen.createLabelName()
-        result += IRCodeChunk(null, null).also {
-            it += IRInstruction(comparisonOpcode, type, reg1 = rightTr.resultReg, reg2 = leftTr.resultReg, labelSymbol = after)
-            // right <= left, take right
-            it += IRInstruction(Opcode.LOADR, type, reg1=leftTr.resultReg, reg2=rightTr.resultReg)
-            it += IRInstruction(Opcode.JUMP, labelSymbol = after)
-        }
-        result += IRCodeChunk(after, null)
-        return ExpressionCodeResult(result, type, leftTr.resultReg, -1)
-    }
-
-    private fun funcMax(call: PtBuiltinFunctionCall): ExpressionCodeResult {
-        val type = irType(call.type)
-        val result = mutableListOf<IRCodeChunkBase>()
-        val leftTr = exprGen.translateExpression(call.args[0])
-        addToResult(result, leftTr, leftTr.resultReg, -1)
-        val rightTr = exprGen.translateExpression(call.args[1])
-        addToResult(result, rightTr, rightTr.resultReg, -1)
-        val comparisonOpcode = if(call.type in SignedDatatypes) Opcode.BGTSR else Opcode.BGTR
-        val after = codeGen.createLabelName()
-        result += IRCodeChunk(null, null).also {
-            it += IRInstruction(comparisonOpcode, type, reg1 = leftTr.resultReg, reg2 = rightTr.resultReg, labelSymbol = after)
-            // right >= left, take right
-            it += IRInstruction(Opcode.LOADR, type, reg1=leftTr.resultReg, reg2=rightTr.resultReg)
-            it += IRInstruction(Opcode.JUMP, labelSymbol = after)
-        }
-        result += IRCodeChunk(after, null)
-        return ExpressionCodeResult(result, type, leftTr.resultReg, -1)
+        return ExpressionCodeResult(result, IRDataType.WORD, lsbTr.resultReg, -1)
     }
 
     private fun funcPokeW(call: PtBuiltinFunctionCall): ExpressionCodeResult {

codeGenIntermediate/src/prog8/codegen/intermediate/ExpressionGen.kt

@@ -1,6 +1,7 @@
 package prog8.codegen.intermediate
 
 import prog8.code.StRomSub
+import prog8.code.StStaticVariable
 import prog8.code.StSub
 import prog8.code.ast.*
 import prog8.code.core.AssemblyError
@@ -44,9 +45,9 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                 }
             }
             is PtIdentifier -> {
+                val vmDt = irType(expr.type)
                 val code = IRCodeChunk(null, null)
                 if (expr.type in PassByValueDatatypes) {
-                    val vmDt = irType(expr.type)
                     if(vmDt==IRDataType.FLOAT) {
                         val resultFpRegister = codeGen.registers.nextFreeFloat()
                         code += IRInstruction(Opcode.LOADM, vmDt, fpReg1 = resultFpRegister, labelSymbol = expr.name)
@@ -59,7 +60,6 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                     }
                 } else {
                     // for strings and arrays etc., load the *address* of the value instead
-                    val vmDt = if(expr.type==DataType.UNDEFINED) IRDataType.WORD else irType(expr.type)
                     val resultRegister = codeGen.registers.nextFree()
                     code += IRInstruction(Opcode.LOAD, vmDt, reg1 = resultRegister, labelSymbol = expr.name)
                     ExpressionCodeResult(code, vmDt, resultRegister, -1)
@@ -105,7 +105,8 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
 
     private fun translate(check: PtContainmentCheck): ExpressionCodeResult {
         val result = mutableListOf<IRCodeChunkBase>()
-        when(check.iterable.type) {
+        val iterable = codeGen.symbolTable.flat.getValue(check.iterable.name) as StStaticVariable
+        when(iterable.dt) {
             DataType.STR -> {
                 val elementTr = translateExpression(check.element)
                 addToResult(result, elementTr, elementTr.resultReg, -1)
@@ -120,8 +121,7 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                 val iterableTr = translateExpression(check.iterable)
                 addToResult(result, iterableTr, iterableTr.resultReg, -1)
                 val lengthReg = codeGen.registers.nextFree()
-                val iterableLength = codeGen.symbolTable.getLength(check.iterable.name)
-                addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1=lengthReg, immediate = iterableLength!!), null)
+                addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1=lengthReg, immediate = iterable.length!!), null)
                 result += codeGen.makeSyscall(IMSyscall.BYTEARRAY_CONTAINS, listOf(IRDataType.BYTE to elementTr.resultReg, IRDataType.WORD to iterableTr.resultReg, IRDataType.BYTE to lengthReg), IRDataType.BYTE to elementTr.resultReg)
                 return ExpressionCodeResult(result, IRDataType.BYTE, elementTr.resultReg, -1)
             }
@@ -131,13 +131,12 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                 val iterableTr = translateExpression(check.iterable)
                 addToResult(result, iterableTr, iterableTr.resultReg, -1)
                 val lengthReg = codeGen.registers.nextFree()
-                val iterableLength = codeGen.symbolTable.getLength(check.iterable.name)
-                addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1=lengthReg, immediate = iterableLength!!), null)
+                addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1=lengthReg, immediate = iterable.length!!), null)
                 result += codeGen.makeSyscall(IMSyscall.WORDARRAY_CONTAINS, listOf(IRDataType.WORD to elementTr.resultReg, IRDataType.WORD to iterableTr.resultReg, IRDataType.BYTE to lengthReg), IRDataType.BYTE to elementTr.resultReg)
                 return ExpressionCodeResult(result, IRDataType.BYTE, elementTr.resultReg, -1)
             }
             DataType.ARRAY_F -> throw AssemblyError("containment check in float-array not supported")
-            else -> throw AssemblyError("weird iterable dt ${check.iterable.type} for ${check.iterable.name}")
+            else -> throw AssemblyError("weird iterable dt ${iterable.dt} for ${check.iterable.name}")
         }
     }
 
@@ -161,33 +160,6 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
         }
 
         var resultRegister = -1
-
-        if(arrayIx.splitWords) {
-            require(vmDt==IRDataType.WORD)
-            val arrayLength = codeGen.symbolTable.getLength(arrayIx.variable.name)
-            resultRegister = codeGen.registers.nextFree()
-            val finalResultReg = codeGen.registers.nextFree()
-            if(arrayIx.index is PtNumber) {
-                val memOffset = (arrayIx.index as PtNumber).number.toInt()
-                result += IRCodeChunk(null, null).also {
-                    val tmpRegMsb = codeGen.registers.nextFree()
-                    it += IRInstruction(Opcode.LOADM, IRDataType.BYTE, reg1=resultRegister, immediate = arrayLength, labelSymbol= "${arrayVarSymbol}_lsb+$memOffset")
-                    it += IRInstruction(Opcode.LOADM, IRDataType.BYTE, reg1=tmpRegMsb, immediate = arrayLength, labelSymbol= "${arrayVarSymbol}_msb+$memOffset")
-                    it += IRInstruction(Opcode.CONCAT, IRDataType.BYTE, reg1=finalResultReg, reg2=resultRegister, reg3=tmpRegMsb)
-                }
-            } else {
-                val tr = translateExpression(arrayIx.index)
-                addToResult(result, tr, tr.resultReg, -1)
-                result += IRCodeChunk(null, null).also {
-                    val tmpRegMsb = codeGen.registers.nextFree()
-                    it += IRInstruction(Opcode.LOADX, IRDataType.BYTE, reg1=resultRegister, reg2 = tr.resultReg, immediate = arrayLength, labelSymbol= "${arrayVarSymbol}_lsb")
-                    it += IRInstruction(Opcode.LOADX, IRDataType.BYTE, reg1=tmpRegMsb, reg2 = tr.resultReg, immediate = arrayLength, labelSymbol= "${arrayVarSymbol}_msb")
-                    it += IRInstruction(Opcode.CONCAT, IRDataType.BYTE, reg1=finalResultReg, reg2=resultRegister, reg3=tmpRegMsb)
-                }
-            }
-            return ExpressionCodeResult(result, vmDt, finalResultReg, -1)
-        }
-
         var resultFpRegister = -1
         if(arrayIx.index is PtNumber) {
             val memOffset = ((arrayIx.index as PtNumber).number.toInt() * eltSize).toString()
@@ -275,13 +247,13 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                 when(cast.value.type) {
                     DataType.BYTE -> {
                         // byte -> uword:   sign extend
-                        actualResultReg2 = codeGen.registers.nextFree()
-                        addInstr(result, IRInstruction(Opcode.EXTS, type = IRDataType.BYTE, reg1 = actualResultReg2, reg2 = tr.resultReg), null)
+                        actualResultReg2 = tr.resultReg
+                        addInstr(result, IRInstruction(Opcode.EXTS, type = IRDataType.BYTE, reg1 = actualResultReg2), null)
                     }
                     DataType.UBYTE -> {
                         // ubyte -> uword:   sign extend
-                        actualResultReg2 = codeGen.registers.nextFree()
-                        addInstr(result, IRInstruction(Opcode.EXT, type = IRDataType.BYTE, reg1 = actualResultReg2, reg2 = tr.resultReg), null)
+                        actualResultReg2 = tr.resultReg
+                        addInstr(result, IRInstruction(Opcode.EXT, type = IRDataType.BYTE, reg1 = actualResultReg2), null)
                     }
                     DataType.WORD -> {
                         actualResultReg2 = tr.resultReg
@@ -297,13 +269,13 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                 when(cast.value.type) {
                     DataType.BYTE -> {
                         // byte -> word:   sign extend
-                        actualResultReg2 = codeGen.registers.nextFree()
-                        addInstr(result, IRInstruction(Opcode.EXTS, type = IRDataType.BYTE, reg1 = actualResultReg2, reg2=tr.resultReg), null)
+                        actualResultReg2 = tr.resultReg
+                        addInstr(result, IRInstruction(Opcode.EXTS, type = IRDataType.BYTE, reg1 = actualResultReg2), null)
                     }
                     DataType.UBYTE -> {
                         // byte -> word:   sign extend
-                        actualResultReg2 = codeGen.registers.nextFree()
-                        addInstr(result, IRInstruction(Opcode.EXT, type = IRDataType.BYTE, reg1 = actualResultReg2, reg2=tr.resultReg), null)
+                        actualResultReg2 = tr.resultReg
+                        addInstr(result, IRInstruction(Opcode.EXT, type = IRDataType.BYTE, reg1 = actualResultReg2), null)
                     }
                     DataType.UWORD -> {
                         actualResultReg2 = tr.resultReg
@@ -340,6 +312,7 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
     }
 
     private fun translate(binExpr: PtBinaryExpression): ExpressionCodeResult {
+        require(!codeGen.options.useNewExprCode)
         val vmDt = irType(binExpr.left.type)
         val signed = binExpr.left.type in SignedDatatypes
         return when(binExpr.operator) {
@@ -455,7 +428,6 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
         greaterEquals: Boolean
     ): ExpressionCodeResult {
         val result = mutableListOf<IRCodeChunkBase>()
-        val cmpResultReg = codeGen.registers.nextFree()
         if(vmDt==IRDataType.FLOAT) {
             val leftTr = translateExpression(binExpr.left)
             addToResult(result, leftTr, -1, leftTr.resultFpReg)
@@ -470,10 +442,10 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
             } else {
                 if (greaterEquals) Opcode.SGE else Opcode.SGT
             }
-            addInstr(result, IRInstruction(ins, IRDataType.BYTE, reg1=cmpResultReg, reg2 = resultRegister, reg3 = zeroRegister), null)
-            return ExpressionCodeResult(result, IRDataType.BYTE, cmpResultReg, -1)
+            addInstr(result, IRInstruction(ins, IRDataType.BYTE, reg1 = resultRegister, reg2 = zeroRegister), null)
+            return ExpressionCodeResult(result, IRDataType.BYTE, resultRegister, -1)
         } else {
-            if(binExpr.left.type==DataType.STR || binExpr.right.type==DataType.STR) {
+            if(binExpr.left.type==DataType.STR && binExpr.right.type==DataType.STR) {
                 throw AssemblyError("str compares should have been replaced with builtin function call to do the compare")
             } else {
                 val leftTr = translateExpression(binExpr.left)
@@ -485,8 +457,8 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                 } else {
                     if (greaterEquals) Opcode.SGE else Opcode.SGT
                 }
-                addInstr(result, IRInstruction(ins, vmDt, reg1=cmpResultReg, reg2 = leftTr.resultReg, reg3 = rightTr.resultReg), null)
-                return ExpressionCodeResult(result, IRDataType.BYTE, cmpResultReg, -1)
+                addInstr(result, IRInstruction(ins, vmDt, reg1 = leftTr.resultReg, reg2 = rightTr.resultReg), null)
+                return ExpressionCodeResult(result, IRDataType.BYTE, leftTr.resultReg, -1)
             }
         }
     }
@@ -498,7 +470,6 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
         lessEquals: Boolean
     ): ExpressionCodeResult {
         val result = mutableListOf<IRCodeChunkBase>()
-        val cmpResultRegister = codeGen.registers.nextFree()
         if(vmDt==IRDataType.FLOAT) {
             val leftTr = translateExpression(binExpr.left)
             addToResult(result, leftTr, -1, leftTr.resultFpReg)
@@ -513,10 +484,10 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
             } else {
                 if (lessEquals) Opcode.SLE else Opcode.SLT
             }
-            addInstr(result, IRInstruction(ins, IRDataType.BYTE, reg1=cmpResultRegister, reg2 = resultRegister, reg3 = zeroRegister), null)
-            return ExpressionCodeResult(result, IRDataType.BYTE, cmpResultRegister, -1)
+            addInstr(result, IRInstruction(ins, IRDataType.BYTE, reg1 = resultRegister, reg2 = zeroRegister), null)
+            return ExpressionCodeResult(result, IRDataType.BYTE, resultRegister, -1)
         } else {
-            if(binExpr.left.type==DataType.STR || binExpr.right.type==DataType.STR) {
+            if(binExpr.left.type==DataType.STR && binExpr.right.type==DataType.STR) {
                 throw AssemblyError("str compares should have been replaced with builtin function call to do the compare")
             } else {
                 val leftTr = translateExpression(binExpr.left)
@@ -528,8 +499,8 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                 } else {
                     if (lessEquals) Opcode.SLE else Opcode.SLT
                 }
-                addInstr(result, IRInstruction(ins, vmDt, reg1=cmpResultRegister, reg2 = leftTr.resultReg, reg3 = rightTr.resultReg), null)
-                return ExpressionCodeResult(result, IRDataType.BYTE, cmpResultRegister, -1)
+                addInstr(result, IRInstruction(ins, vmDt, reg1 = leftTr.resultReg, reg2 = rightTr.resultReg), null)
+                return ExpressionCodeResult(result, IRDataType.BYTE, leftTr.resultReg, -1)
             }
         }
     }
@@ -555,7 +526,7 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
             result += IRCodeChunk(label, null)
             return ExpressionCodeResult(result, IRDataType.BYTE, resultRegister, -1)
         } else {
-            if(binExpr.left.type==DataType.STR || binExpr.right.type==DataType.STR) {
+            if(binExpr.left.type==DataType.STR && binExpr.right.type==DataType.STR) {
                 throw AssemblyError("str compares should have been replaced with builtin function call to do the compare")
             } else {
                 return if(constValue(binExpr.right)==0.0) {
@@ -571,9 +542,8 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                     val rightTr = translateExpression(binExpr.right)
                     addToResult(result, rightTr, rightTr.resultReg, -1)
                     val opcode = if (notEquals) Opcode.SNE else Opcode.SEQ
-                    val resultReg = codeGen.registers.nextFree()
-                    addInstr(result, IRInstruction(opcode, vmDt, reg1 = resultReg, reg2 = leftTr.resultReg, reg3 = rightTr.resultReg), null)
-                    ExpressionCodeResult(result, IRDataType.BYTE, resultReg, -1)
+                    addInstr(result, IRInstruction(opcode, vmDt, reg1 = leftTr.resultReg, reg2 = rightTr.resultReg), null)
+                    ExpressionCodeResult(result, IRDataType.BYTE, leftTr.resultReg, -1)
                 }
             }
         }
@@ -1243,7 +1213,6 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
     ): MutableList<IRCodeChunkBase> {
         val result = mutableListOf<IRCodeChunkBase>()
         val valueReg = codeGen.registers.nextFree()
-        val cmpResultReg = codeGen.registers.nextFree()
         if(operand is PtNumber) {
             val numberReg = codeGen.registers.nextFree()
             if (knownAddress != null) {
@@ -1251,16 +1220,16 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                 result += IRCodeChunk(null, null).also {
                     it += IRInstruction(Opcode.LOADM, vmDt, reg1 = valueReg, address = knownAddress)
                     it += IRInstruction(Opcode.LOAD, vmDt, reg1=numberReg, immediate = operand.number.toInt())
-                    it += IRInstruction(compareAndSetOpcode, vmDt, reg1 = cmpResultReg, reg2 = valueReg, reg3 = numberReg)
-                    it += IRInstruction(Opcode.STOREM, vmDt, reg1 = cmpResultReg, address = knownAddress)
+                    it += IRInstruction(compareAndSetOpcode, vmDt, reg1 = valueReg, reg2 = numberReg)
+                    it += IRInstruction(Opcode.STOREM, vmDt, reg1 = valueReg, address = knownAddress)
                 }
             } else {
                 // in-place modify a symbol (variable)
                 result += IRCodeChunk(null, null).also {
                     it += IRInstruction(Opcode.LOADM, vmDt, reg1 = valueReg, labelSymbol = symbol)
                     it += IRInstruction(Opcode.LOAD, vmDt, reg1=numberReg, immediate = operand.number.toInt())
-                    it += IRInstruction(compareAndSetOpcode, vmDt, reg1=cmpResultReg, reg2 = valueReg, reg3 = numberReg)
-                    it += IRInstruction(Opcode.STOREM, vmDt, reg1 = cmpResultReg, labelSymbol = symbol)
+                    it += IRInstruction(compareAndSetOpcode, vmDt, reg1 = valueReg, reg2 = numberReg)
+                    it += IRInstruction(Opcode.STOREM, vmDt, reg1 = valueReg, labelSymbol = symbol)
                 }
             }
         } else {
@@ -1270,15 +1239,15 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                 // in-place modify a memory location
                 result += IRCodeChunk(null, null).also {
                     it += IRInstruction(Opcode.LOADM, vmDt, reg1 = valueReg, address = knownAddress)
-                    it += IRInstruction(compareAndSetOpcode, vmDt, reg1=cmpResultReg, reg2 = valueReg, reg3 = tr.resultReg)
-                    it += IRInstruction(Opcode.STOREM, vmDt, reg1 = cmpResultReg, address = knownAddress)
+                    it += IRInstruction(compareAndSetOpcode, vmDt, reg1 = valueReg, reg2 = tr.resultReg)
+                    it += IRInstruction(Opcode.STOREM, vmDt, reg1 = valueReg, address = knownAddress)
                 }
             } else {
                 // in-place modify a symbol (variable)
                 result += IRCodeChunk(null, null).also {
                     it += IRInstruction(Opcode.LOADM, vmDt, reg1 = valueReg, labelSymbol = symbol)
-                    it += IRInstruction(compareAndSetOpcode, vmDt, reg1=cmpResultReg, reg2 = valueReg, reg3 = tr.resultReg)
-                    it += IRInstruction(Opcode.STOREM, vmDt, reg1 = cmpResultReg, labelSymbol = symbol)
+                    it += IRInstruction(compareAndSetOpcode, vmDt, reg1 = valueReg, reg2 = tr.resultReg)
+                    it += IRInstruction(Opcode.STOREM, vmDt, reg1 = valueReg, labelSymbol = symbol)
                 }
             }
         }
@@ -1297,7 +1266,6 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
         val zeroReg = codeGen.registers.nextFree()
         if(operand is PtNumber) {
             val numberReg = codeGen.registers.nextFreeFloat()
-            val cmpResultReg = codeGen.registers.nextFree()
             if (knownAddress != null) {
                 // in-place modify a memory location
                 result += IRCodeChunk(null, null).also {
@@ -1305,8 +1273,8 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                     it += IRInstruction(Opcode.LOAD, IRDataType.FLOAT, fpReg1 = numberReg, immediateFp = operand.number.toFloat())
                     it += IRInstruction(Opcode.FCOMP, IRDataType.FLOAT, reg1=cmpReg, fpReg1 = valueReg, fpReg2 = numberReg)
                     it += IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1=zeroReg, immediate = 0)
-                    it += IRInstruction(compareAndSetOpcode, IRDataType.BYTE, reg1=cmpResultReg, reg2=cmpReg, reg3=zeroReg)
-                    it += IRInstruction(Opcode.FFROMUB, IRDataType.FLOAT, reg1=cmpResultReg, fpReg1 = valueReg)
+                    it += IRInstruction(compareAndSetOpcode, IRDataType.BYTE, reg1=cmpReg, reg2=zeroReg)
+                    it += IRInstruction(Opcode.FFROMUB, IRDataType.FLOAT, reg1=cmpReg, fpReg1 = valueReg)
                     it += IRInstruction(Opcode.STOREM, IRDataType.FLOAT, fpReg1 = valueReg, address = knownAddress)
                 }
             } else {
@@ -1316,14 +1284,13 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                     it += IRInstruction(Opcode.LOAD, IRDataType.FLOAT, fpReg1 = numberReg, immediateFp = operand.number.toFloat())
                     it += IRInstruction(Opcode.FCOMP, IRDataType.FLOAT, reg1=cmpReg, fpReg1 = valueReg, fpReg2 = numberReg)
                     it += IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1=zeroReg, immediate = 0)
-                    it += IRInstruction(compareAndSetOpcode, IRDataType.BYTE, reg1=cmpResultReg, reg2=cmpReg, reg3=zeroReg)
-                    it += IRInstruction(Opcode.FFROMUB, IRDataType.FLOAT, reg1=cmpResultReg, fpReg1 = valueReg)
+                    it += IRInstruction(compareAndSetOpcode, IRDataType.BYTE, reg1=cmpReg, reg2=zeroReg)
+                    it += IRInstruction(Opcode.FFROMUB, IRDataType.FLOAT, reg1=cmpReg, fpReg1 = valueReg)
                     it += IRInstruction(Opcode.STOREM, IRDataType.FLOAT, fpReg1 = valueReg, labelSymbol = symbol)
                 }
             }
         } else {
             val tr = translateExpression(operand)
-            val cmpResultReg = codeGen.registers.nextFree()
             addToResult(result, tr, -1, tr.resultFpReg)
             if (knownAddress != null) {
                 // in-place modify a memory location
@@ -1331,8 +1298,8 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                     it += IRInstruction(Opcode.LOADM, IRDataType.FLOAT, fpReg1 = valueReg, address = knownAddress)
                     it += IRInstruction(Opcode.FCOMP, IRDataType.FLOAT, reg1=cmpReg, fpReg1 = valueReg, fpReg2 = tr.resultFpReg)
                     it += IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1=zeroReg, immediate = 0)
-                    it += IRInstruction(compareAndSetOpcode, IRDataType.BYTE, reg1=cmpResultReg, reg2=cmpReg, reg3=zeroReg)
-                    it += IRInstruction(Opcode.FFROMUB, IRDataType.FLOAT, reg1=cmpResultReg, fpReg1 = valueReg)
+                    it += IRInstruction(compareAndSetOpcode, IRDataType.BYTE, reg1=cmpReg, reg2=zeroReg)
+                    it += IRInstruction(Opcode.FFROMUB, IRDataType.FLOAT, reg1=cmpReg, fpReg1 = valueReg)
                     it += IRInstruction(Opcode.STOREM, IRDataType.FLOAT, fpReg1 = valueReg, address = knownAddress)
                 }
             } else {
@@ -1341,8 +1308,8 @@ internal class ExpressionGen(private val codeGen: IRCodeGen) {
                     it += IRInstruction(Opcode.LOADM, IRDataType.FLOAT, fpReg1 = valueReg, labelSymbol = symbol)
                     it += IRInstruction(Opcode.FCOMP, IRDataType.FLOAT, reg1=cmpReg, fpReg1 = valueReg, fpReg2 = tr.resultFpReg)
                     it += IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1=zeroReg, immediate = 0)
-                    it += IRInstruction(compareAndSetOpcode, IRDataType.BYTE, reg1=cmpResultReg, reg2=cmpReg, reg3=zeroReg)
-                    it += IRInstruction(Opcode.FFROMUB, IRDataType.FLOAT, reg1=cmpResultReg, fpReg1 = valueReg)
+                    it += IRInstruction(compareAndSetOpcode, IRDataType.BYTE, reg1=cmpReg, reg2=zeroReg)
+                    it += IRInstruction(Opcode.FFROMUB, IRDataType.FLOAT, reg1=cmpReg, fpReg1 = valueReg)
                     it += IRInstruction(Opcode.STOREM, IRDataType.FLOAT, fpReg1 = valueReg, labelSymbol = symbol)
                 }
             }

codeGenIntermediate/src/prog8/codegen/intermediate/IRCodeGen.kt

@@ -1,6 +1,9 @@
 package prog8.codegen.intermediate
 
-import prog8.code.*
+import prog8.code.StMemVar
+import prog8.code.StNode
+import prog8.code.StStaticVariable
+import prog8.code.SymbolTable
 import prog8.code.ast.*
 import prog8.code.core.*
 import prog8.intermediate.*
@@ -55,10 +58,6 @@ class IRCodeGen(
         val optimizer = IRPeepholeOptimizer(irProg)
         optimizer.optimize(options.optimize, errors)
         irProg.validate()
-
-        val regOptimizer = IRRegisterOptimizer(irProg)
-        regOptimizer.optimize()
-
         return irProg
     }
 
@@ -99,16 +98,14 @@ class IRCodeGen(
         // make sure that first chunks in Blocks and Subroutines share the name of the block/sub as label.
 
         irProg.blocks.forEach { block ->
-            if(block.isNotEmpty()) {
-                val firstAsm = block.children[0] as? IRInlineAsmChunk
-                if(firstAsm!=null) {
-                    if(firstAsm.label==null) {
-                        val replacement = IRInlineAsmChunk(block.label, firstAsm.assembly, firstAsm.isIR, firstAsm.next)
-                        block.children.removeAt(0)
-                        block.children.add(0, replacement)
-                    } else if(firstAsm.label != block.label) {
-                        throw AssemblyError("first chunk in block has label that differs from block name")
-                    }
+            block.children.firstOrNull { it is IRInlineAsmChunk }?.let { first->
+                first as IRInlineAsmChunk
+                if(first.label==null) {
+                    val replacement = IRInlineAsmChunk(block.label, first.assembly, first.isIR, first.next)
+                    block.children.removeAt(0)
+                    block.children.add(0, replacement)
+                } else if(first.label != block.label) {
+                    throw AssemblyError("first chunk in block has label that differs from block name")
                 }
             }
 
@@ -142,7 +139,7 @@ class IRCodeGen(
         // note: we do still export the memory mapped symbols so a code generator can use those
         //       for instance when a piece of inlined assembly references them.
         val replacements = mutableListOf<Triple<IRCodeChunkBase, Int, UInt>>()
-        irProg.foreachCodeChunk { chunk ->
+        irProg.blocks.asSequence().flatMap { it.children.filterIsInstance<IRSubroutine>() }.flatMap { it.chunks }.forEach { chunk ->
             chunk.instructions.withIndex().forEach {
                 (idx, instr) ->
                     val symbolExpr = instr.labelSymbol
@@ -167,22 +164,16 @@ class IRCodeGen(
 
         replacements.forEach {
             val old = it.first.instructions[it.second]
-            val formats = instructionFormats.getValue(old.opcode)
-            val format = formats.getOrElse(old.type) { throw IllegalArgumentException("type ${old.type} invalid for ${old.opcode}") }
-            val immediateValue = if(format.immediate) it.third.toInt() else null
-            val addressValue = if(format.immediate) null else it.third.toInt()
-
             it.first.instructions[it.second] = IRInstruction(
                 old.opcode,
                 old.type,
                 old.reg1,
                 old.reg2,
-                old.reg3,
                 old.fpReg1,
                 old.fpReg2,
-                immediate = immediateValue,
                 null,
-                address = addressValue,
+                null,
+                address = it.third.toInt(),
                 null,
                 null
             )
@@ -400,35 +391,42 @@ class IRCodeGen(
     }
 
     private fun translate(whenStmt: PtWhen): IRCodeChunks {
+        if(whenStmt.choices.children.isEmpty())
+            return emptyList()
         val result = mutableListOf<IRCodeChunkBase>()
         val valueDt = irType(whenStmt.value.type)
         val valueTr = expressionEval.translateExpression(whenStmt.value)
         addToResult(result, valueTr, valueTr.resultReg, -1)
-
-        val choices = mutableListOf<Pair<String, PtWhenChoice>>()
+        val choices = whenStmt.choices.children.map {it as PtWhenChoice }
         val endLabel = createLabelName()
-        whenStmt.choices.children.forEach {
-            val choice = it as PtWhenChoice
+        for (choice in choices) {
             if(choice.isElse) {
                 result += translateNode(choice.statements)
-                addInstr(result, IRInstruction(Opcode.JUMP, labelSymbol = endLabel), null)
             } else {
-                val choiceLabel = createLabelName()
-                choices.add(choiceLabel to choice)
-                choice.values.children.map { it as PtNumber }.sortedBy { it.number }.forEach { value ->
-                    addInstr(result, IRInstruction(Opcode.BEQ, valueDt, reg1=valueTr.resultReg, immediate = value.number.toInt(), labelSymbol = choiceLabel), null)
+                val skipLabel = createLabelName()
+                val values = choice.values.children.map {it as PtNumber}
+                if(values.size==1) {
+                    val chunk = IRCodeChunk(null, null)
+                    chunk += IRInstruction(Opcode.BNE, valueDt, reg1=valueTr.resultReg, immediate = values[0].number.toInt(), labelSymbol = skipLabel)
+                    result += chunk
+                    result += translateNode(choice.statements)
+                    if(choice.statements.children.last() !is PtReturn)
+                        addInstr(result, IRInstruction(Opcode.JUMP, labelSymbol = endLabel), null)
+                } else {
+                    val matchLabel = createLabelName()
+                    val chunk = IRCodeChunk(null, null)
+                    for (value in values) {
+                        chunk += IRInstruction(Opcode.BEQ, valueDt, reg1=valueTr.resultReg, immediate = value.number.toInt(), labelSymbol = matchLabel)
+                    }
+                    chunk += IRInstruction(Opcode.JUMP, labelSymbol = skipLabel)
+                    result += chunk
+                    result += labelFirstChunk(translateNode(choice.statements), matchLabel)
+                    if(choice.statements.children.last() !is PtReturn)
+                        addInstr(result, IRInstruction(Opcode.JUMP, labelSymbol = endLabel), null)
                 }
+                result += IRCodeChunk(skipLabel, null)
             }
         }
-        addInstr(result, IRInstruction(Opcode.JUMP, labelSymbol = endLabel), null)
-
-        choices.forEach { (label, choice) ->
-            result += labelFirstChunk(translateNode(choice.statements), label)
-            val lastStatement = choice.statements.children.last()
-            if(lastStatement !is PtReturn && lastStatement !is PtJump)
-                addInstr(result, IRInstruction(Opcode.JUMP, labelSymbol = endLabel), null)
-        }
-
         result += IRCodeChunk(endLabel, null)
         return result
     }
@@ -445,63 +443,54 @@ class IRCodeGen(
                     result += translateForInNonConstantRange(forLoop, loopvar)
             }
             is PtIdentifier -> {
+                val iterableVar = symbolTable.lookup(iterable.name) as StStaticVariable
                 require(forLoop.variable.name == loopvar.scopedName)
-                val iterableLength = symbolTable.getLength(iterable.name)
                 val loopvarSymbol = forLoop.variable.name
                 val indexReg = registers.nextFree()
                 val tmpReg = registers.nextFree()
                 val loopLabel = createLabelName()
                 val endLabel = createLabelName()
-                when (iterable.type) {
-                    DataType.STR -> {
-                        // iterate over a zero-terminated string
-                        addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1 = indexReg, immediate = 0), null)
-                        result += IRCodeChunk(loopLabel, null).also {
-                            it += IRInstruction(Opcode.LOADX, IRDataType.BYTE, reg1 = tmpReg, reg2 = indexReg, labelSymbol = iterable.name)
-                            it += IRInstruction(Opcode.BEQ, IRDataType.BYTE, reg1 = tmpReg, immediate = 0, labelSymbol = endLabel)
-                            it += IRInstruction(Opcode.STOREM, IRDataType.BYTE, reg1 = tmpReg, labelSymbol = loopvarSymbol)
-                        }
-                        result += translateNode(forLoop.statements)
-                        val jumpChunk = IRCodeChunk(null, null)
-                        jumpChunk += IRInstruction(Opcode.INC, IRDataType.BYTE, reg1 = indexReg)
-                        jumpChunk += IRInstruction(Opcode.JUMP, labelSymbol = loopLabel)
-                        result += jumpChunk
-                        result += IRCodeChunk(endLabel, null)
-                    }
-                    in SplitWordArrayTypes -> {
-                        // iterate over lsb/msb split word array
-                        val elementDt = ArrayToElementTypes.getValue(iterable.type)
-                        if(elementDt !in WordDatatypes)
-                            throw AssemblyError("weird dt")
-                        addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1=indexReg, immediate = 0), null)
-                        result += IRCodeChunk(loopLabel, null).also {
-                            val tmpRegLsb = registers.nextFree()
-                            val tmpRegMsb = registers.nextFree()
-                            val concatReg = registers.nextFree()
-                            it += IRInstruction(Opcode.LOADX, IRDataType.BYTE, reg1=tmpRegLsb, reg2=indexReg, immediate = iterableLength, labelSymbol=iterable.name+"_lsb")
-                            it += IRInstruction(Opcode.LOADX, IRDataType.BYTE, reg1=tmpRegMsb, reg2=indexReg, immediate = iterableLength, labelSymbol=iterable.name+"_msb")
-                            it += IRInstruction(Opcode.CONCAT, IRDataType.BYTE, reg1=concatReg, reg2=tmpRegLsb, reg3=tmpRegMsb)
-                            it += IRInstruction(Opcode.STOREM, irType(elementDt), reg1=concatReg, labelSymbol = loopvarSymbol)
-                        }
-                        result += translateNode(forLoop.statements)
-                        result += IRCodeChunk(null, null).also {
-                            it += IRInstruction(Opcode.INC, IRDataType.BYTE, reg1=indexReg)
-                            it += IRInstruction(Opcode.BNE, IRDataType.BYTE, reg1=indexReg, immediate = if(iterableLength==256) 0 else iterableLength, labelSymbol = loopLabel)
-                        }
-                    }
-                    else -> {
-                        // iterate over regular array
-                        val elementDt = ArrayToElementTypes.getValue(iterable.type)
-                        val elementSize = program.memsizer.memorySize(elementDt)
-                        val lengthBytes = iterableLength!! * elementSize
-                        addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1=indexReg, immediate = 0), null)
-                        result += IRCodeChunk(loopLabel, null).also {
-                            it += IRInstruction(Opcode.LOADX, irType(elementDt), reg1=tmpReg, reg2=indexReg, labelSymbol=iterable.name)
-                            it += IRInstruction(Opcode.STOREM, irType(elementDt), reg1=tmpReg, labelSymbol = loopvarSymbol)
-                        }
+                if(iterableVar.dt==DataType.STR) {
+                    // iterate over a zero-terminated string
+                    addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1=indexReg, immediate = 0), null)
+                    val chunk = IRCodeChunk(loopLabel, null)
+                    chunk += IRInstruction(Opcode.LOADX, IRDataType.BYTE, reg1=tmpReg, reg2=indexReg, labelSymbol = iterable.name)
+                    chunk += IRInstruction(Opcode.BEQ, IRDataType.BYTE, reg1=tmpReg, immediate = 0, labelSymbol = endLabel)
+                    chunk += IRInstruction(Opcode.STOREM, IRDataType.BYTE, reg1=tmpReg, labelSymbol = loopvarSymbol)
+                    result += chunk
+                    result += translateNode(forLoop.statements)
+                    val jumpChunk = IRCodeChunk(null, null)
+                    jumpChunk += IRInstruction(Opcode.INC, IRDataType.BYTE, reg1=indexReg)
+                    jumpChunk += IRInstruction(Opcode.JUMP, labelSymbol = loopLabel)
+                    result += jumpChunk
+                    result += IRCodeChunk(endLabel, null)
+                } else {
+                    // iterate over array
+                    val elementDt = ArrayToElementTypes.getValue(iterable.type)
+                    val elementSize = program.memsizer.memorySize(elementDt)
+                    val lengthBytes = iterableVar.length!! * elementSize
+                    if(lengthBytes<256) {
+                        val chunk = IRCodeChunk(null, null)
+                        chunk += IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1=indexReg, immediate = 0)
+                        result += chunk
+                        val chunk2 = IRCodeChunk(loopLabel, null)
+                        chunk2 += IRInstruction(Opcode.LOADX, irType(elementDt), reg1=tmpReg, reg2=indexReg, labelSymbol=iterable.name)
+                        chunk2 += IRInstruction(Opcode.STOREM, irType(elementDt), reg1=tmpReg, labelSymbol = loopvarSymbol)
+                        result += chunk2
                         result += translateNode(forLoop.statements)
                         result += addConstReg(IRDataType.BYTE, indexReg, elementSize)
-                        addInstr(result, IRInstruction(Opcode.BNE, IRDataType.BYTE, reg1=indexReg, immediate = if(lengthBytes==256) 0 else lengthBytes, labelSymbol = loopLabel), null)
+                        addInstr(result, IRInstruction(Opcode.BNE, IRDataType.BYTE, reg1=indexReg, immediate = lengthBytes, labelSymbol = loopLabel), null)
+                    } else if(lengthBytes==256) {
+                        addInstr(result, IRInstruction(Opcode.LOAD, IRDataType.BYTE, reg1=indexReg, immediate = 0), null)
+                        val chunk = IRCodeChunk(loopLabel, null)
+                        chunk += IRInstruction(Opcode.LOADX, irType(elementDt), reg1=tmpReg, reg2=indexReg, labelSymbol=iterable.name)
+                        chunk += IRInstruction(Opcode.STOREM, irType(elementDt), reg1=tmpReg, labelSymbol = loopvarSymbol)
+                        result += chunk
+                        result += translateNode(forLoop.statements)
+                        result += addConstReg(IRDataType.BYTE, indexReg, elementSize)
+                        addInstr(result, IRInstruction(Opcode.BNE, IRDataType.BYTE, reg1=indexReg, immediate = 0, labelSymbol = loopLabel), null)
+                    } else {
+                        throw AssemblyError("iterator length should never exceed 256")
                     }
                 }
             }
@@ -547,24 +536,22 @@ class IRCodeGen(
 
         addInstr(result, IRInstruction(Opcode.STOREM, loopvarDtIr, reg1=fromTr.resultReg, labelSymbol=loopvarSymbol), null)
         result += labelFirstChunk(translateNode(forLoop.statements), loopLabel)
-        if(step==1 || step==-1) {
-            // if endvalue == loopvar, stop loop, else iterate
-            addInstr(result, IRInstruction(Opcode.LOADM, loopvarDtIr, reg1 = fromTr.resultReg, labelSymbol = loopvarSymbol), null)
-            addInstr(result, IRInstruction(Opcode.BEQR, loopvarDtIr, reg1=toTr.resultReg, reg2=fromTr.resultReg, labelSymbol = labelAfterFor), null)
-            result += addConstMem(loopvarDtIr, null, loopvarSymbol, step)
-            addInstr(result, IRInstruction(Opcode.JUMP, labelSymbol = loopLabel), null)
-        } else {
-            // ind/dec index, then:
-            // ascending: if endvalue >= loopvar, iterate
-            // descending: if loopvar >= endvalue, iterate
-            result += addConstMem(loopvarDtIr, null, loopvarSymbol, step)
-            addInstr(result, IRInstruction(Opcode.LOADM, loopvarDtIr, reg1=fromTr.resultReg, labelSymbol = loopvarSymbol), null)
-            if(step > 0)
-                addInstr(result, IRInstruction(Opcode.CMP, loopvarDtIr, reg1 = toTr.resultReg, fromTr.resultReg), null)
+        result += addConstMem(loopvarDtIr, null, loopvarSymbol, step)
+        addInstr(result, IRInstruction(Opcode.LOADM, loopvarDtIr, reg1 = fromTr.resultReg, labelSymbol = loopvarSymbol), null)
+        // if endvalue >= index, iterate loop
+        val branchInstr = if(loopvarDt in SignedDatatypes) {
+            if(step>0)
+                IRInstruction(Opcode.BGESR, loopvarDtIr, reg1=toTr.resultReg, reg2=fromTr.resultReg, labelSymbol=loopLabel)
             else
-                addInstr(result, IRInstruction(Opcode.CMP, loopvarDtIr, reg1 = fromTr.resultReg, toTr.resultReg), null)
-            addInstr(result, IRInstruction(Opcode.BSTPOS, labelSymbol = loopLabel), null)
+                IRInstruction(Opcode.BGESR, loopvarDtIr, reg1=fromTr.resultReg, reg2=toTr.resultReg, labelSymbol=loopLabel)
+        } else {
+            if(step>0)
+                IRInstruction(Opcode.BGER, loopvarDtIr, reg1=toTr.resultReg, reg2=fromTr.resultReg, labelSymbol=loopLabel)
+            else
+                IRInstruction(Opcode.BGER, loopvarDtIr, reg1=fromTr.resultReg, reg2=toTr.resultReg, labelSymbol=loopLabel)
         }
+        addInstr(result, branchInstr, null)
+
         result += IRCodeChunk(labelAfterFor, null)
         return result
     }
@@ -909,6 +896,7 @@ class IRCodeGen(
         val goto = ifElse.ifScope.children.firstOrNull() as? PtJump
         when (condition) {
             is PtBinaryExpression -> {
+                require(!options.useNewExprCode)
                 if(condition.operator !in ComparisonOperators)
                     throw AssemblyError("if condition should only be a binary comparison expression")
 
@@ -922,6 +910,7 @@ class IRCodeGen(
             }
             else -> {
                 // if X   --> meaning:  if X!=0
+                require(options.useNewExprCode)
                 val irDt = irType(condition.type)
                 val signed = condition.type in SignedDatatypes
                 return if(goto!=null && ifElse.elseScope.children.isEmpty()) {
@@ -999,10 +988,10 @@ class IRCodeGen(
         val opcode = when (condition.operator) {
             "==" -> Opcode.BEQ
             "!=" -> Opcode.BNE
-            "<" -> if (signed) Opcode.BLTS else Opcode.BLT
-            ">" -> if (signed) Opcode.BGTS else Opcode.BGT
-            "<=" -> if (signed) Opcode.BLES else Opcode.BLE
-            ">=" -> if (signed) Opcode.BGES else Opcode.BGE
+            "<" -> if (signed) Opcode.BLTS else throw AssemblyError("unsigned < 0 shouldn't occur in codegen")
+            ">" -> if (signed) Opcode.BGTS else throw AssemblyError("unsigned > 0 shouldn't occur in codegen")
+            "<=" -> if (signed) Opcode.BLES else throw AssemblyError("unsigned <= 0 shouldn't occur in codegen")
+            ">=" -> if (signed) Opcode.BGES else throw AssemblyError("unsigned >= 0 shouldn't occur in codegen")
             else -> throw AssemblyError("invalid comparison operator")
         }
         if (goto.address != null)
@@ -1136,10 +1125,10 @@ class IRCodeGen(
             elseBranch = when (condition.operator) {
                 "==" -> Opcode.BNE
                 "!=" -> Opcode.BEQ
-                "<" -> if (signed) Opcode.BGES else Opcode.BGE
-                ">" -> if (signed) Opcode.BLES else Opcode.BLE
-                "<=" -> if (signed) Opcode.BGTS else Opcode.BGT
-                ">=" -> if (signed) Opcode.BLTS else Opcode.BLT
+                "<" -> if (signed) Opcode.BGES else throw AssemblyError("unsigned < 0 shouldn't occur in codegen")
+                ">" -> if (signed) Opcode.BLES else throw AssemblyError("unsigned > 0 shouldn't occur in codegen")
+                "<=" -> if (signed) Opcode.BGTS else throw AssemblyError("unsigned <= 0 shouldn't occur in codegen")
+                ">=" -> if (signed) Opcode.BLTS else throw AssemblyError("unsigned >= 0 shouldn't occur in codegen")
                 else -> throw AssemblyError("weird operator")
             }
         }
@@ -1223,7 +1212,7 @@ class IRCodeGen(
                     val afterIfLabel = createLabelName()
                     addInstr(
                         result,
-                        IRInstruction(elseBranch, IRDataType.BYTE, reg1 = compResultReg, immediate = 0, labelSymbol = elseLabel),
+                        IRInstruction(elseBranch, IRDataType.BYTE, reg1 = compResultReg, labelSymbol = elseLabel),
                         null
                     )
                     result += translateNode(ifElse.ifScope)
@@ -1235,7 +1224,7 @@ class IRCodeGen(
                     val afterIfLabel = createLabelName()
                     addInstr(
                         result,
-                        IRInstruction(elseBranch, IRDataType.BYTE, reg1 = compResultReg, immediate = 0, labelSymbol = afterIfLabel),
+                        IRInstruction(elseBranch, IRDataType.BYTE, reg1 = compResultReg, labelSymbol = afterIfLabel),
                         null
                     )
                     result += translateNode(ifElse.ifScope)
@@ -1361,126 +1350,59 @@ class IRCodeGen(
     }
 
     private fun translate(postIncrDecr: PtPostIncrDecr): IRCodeChunks {
-        val result = mutableListOf<IRCodeChunkBase>()
+        val operationMem: Opcode
+        val operationRegister: Opcode
+        when(postIncrDecr.operator) {
+            "++" -> {
+                operationMem = Opcode.INCM
+                operationRegister = Opcode.INC
+            }
+            "--" -> {
+                operationMem = Opcode.DECM
+                operationRegister = Opcode.DEC
+            }
+            else -> throw AssemblyError("weird operator")
+        }
+        val ident = postIncrDecr.target.identifier
+        val memory = postIncrDecr.target.memory
         val array = postIncrDecr.target.array
-        if(array?.splitWords==true) {
+        val irDt = irType(postIncrDecr.target.type)
+        val result = mutableListOf<IRCodeChunkBase>()
+        if(ident!=null) {
+            addInstr(result, IRInstruction(operationMem, irDt, labelSymbol = ident.name), null)
+        } else if(memory!=null) {
+            if(memory.address is PtNumber) {
+                val address = (memory.address as PtNumber).number.toInt()
+                addInstr(result, IRInstruction(operationMem, irDt, address = address), null)
+            } else {
+                val tr = expressionEval.translateExpression(memory.address)
+                addToResult(result, tr, tr.resultReg, -1)
+                val chunk = IRCodeChunk(null, null)
+                val incReg = registers.nextFree()
+                chunk += IRInstruction(Opcode.LOADI, irDt, reg1 = incReg, reg2 = tr.resultReg)
+                chunk += IRInstruction(operationRegister, irDt, reg1 = incReg)
+                chunk += IRInstruction(Opcode.STOREI, irDt, reg1 = incReg, reg2 = tr.resultReg)
+                result += chunk
+            }
+        } else if (array!=null) {
             val variable = array.variable.name
+            val itemsize = program.memsizer.memorySize(array.type)
             val fixedIndex = constIntValue(array.index)
             if(fixedIndex!=null) {
-                val skipLabel = createLabelName()
-                when(postIncrDecr.operator) {
-                    "++" -> {
-                        result += IRCodeChunk(null, null).also {
-                            it += IRInstruction(Opcode.INCM, IRDataType.BYTE, labelSymbol = "${variable}_lsb+$fixedIndex")
-                            it += IRInstruction(Opcode.BSTNE, labelSymbol = skipLabel)
-                            it += IRInstruction(Opcode.INCM, IRDataType.BYTE, labelSymbol = "${variable}_msb+$fixedIndex")
-                        }
-                        result += IRCodeChunk(skipLabel, null)
-                    }
-                    "--" -> {
-                        val valueReg=registers.nextFree()
-                        result += IRCodeChunk(null, null).also {
-                            it += IRInstruction(Opcode.LOADM, IRDataType.BYTE, reg1=valueReg, labelSymbol = "${variable}_lsb+$fixedIndex")
-                            it += IRInstruction(Opcode.BSTNE, labelSymbol = skipLabel)
-                            it += IRInstruction(Opcode.DECM, IRDataType.BYTE, labelSymbol = "${variable}_msb+$fixedIndex")
-                        }
-                        result += IRCodeChunk(skipLabel, null).also {
-                            it += IRInstruction(Opcode.DECM, IRDataType.BYTE, labelSymbol = "${variable}_lsb+$fixedIndex")
-                        }
-                    }
-                    else -> throw AssemblyError("weird operator")
-                }
+                val offset = fixedIndex*itemsize
+                addInstr(result, IRInstruction(operationMem, irDt, labelSymbol="$variable+$offset"), null)
             } else {
-                val arrayLength = symbolTable.getLength(array.variable.name)
                 val indexTr = expressionEval.translateExpression(array.index)
                 addToResult(result, indexTr, indexTr.resultReg, -1)
+                val chunk = IRCodeChunk(null, null)
                 val incReg = registers.nextFree()
-                val skipLabel = createLabelName()
-                when(postIncrDecr.operator) {
-                    "++" -> {
-                        result += IRCodeChunk(null, null).also {
-                            it += IRInstruction(Opcode.LOADX, IRDataType.BYTE, reg1=incReg, reg2=indexTr.resultReg, immediate = arrayLength, labelSymbol = "${variable}_lsb")
-                            it += IRInstruction(Opcode.INC, IRDataType.BYTE, reg1=incReg)
-                            it += IRInstruction(Opcode.STOREX, IRDataType.BYTE, reg1=incReg, reg2=indexTr.resultReg, immediate = arrayLength, labelSymbol = "${variable}_lsb")
-                            it += IRInstruction(Opcode.BSTNE, labelSymbol = skipLabel)
-                            it += IRInstruction(Opcode.LOADX, IRDataType.BYTE, reg1=incReg, reg2=indexTr.resultReg, immediate = arrayLength, labelSymbol = "${variable}_msb")
-                            it += IRInstruction(Opcode.INC, IRDataType.BYTE, reg1=incReg)
-                            it += IRInstruction(Opcode.STOREX, IRDataType.BYTE, reg1=incReg, reg2=indexTr.resultReg, immediate = arrayLength, labelSymbol = "${variable}_msb")
-                        }
-                        result += IRCodeChunk(skipLabel, null)
-                    }
-                    "--" -> {
-                        result += IRCodeChunk(null, null).also {
-                            it += IRInstruction(Opcode.LOADX, IRDataType.BYTE, reg1=incReg, reg2=indexTr.resultReg, immediate = arrayLength, labelSymbol = "${variable}_lsb")
-                            it += IRInstruction(Opcode.BSTNE, labelSymbol = skipLabel)
-                            it += IRInstruction(Opcode.LOADX, IRDataType.BYTE, reg1=incReg, reg2=indexTr.resultReg, immediate = arrayLength, labelSymbol = "${variable}_msb")
-                            it += IRInstruction(Opcode.DEC, IRDataType.BYTE, reg1=incReg)
-                            it += IRInstruction(Opcode.STOREX, IRDataType.BYTE, reg1=incReg, reg2=indexTr.resultReg, immediate = arrayLength, labelSymbol = "${variable}_msb")
-                        }
-                        result += IRCodeChunk(skipLabel, null).also {
-                            it += IRInstruction(Opcode.LOADX, IRDataType.BYTE, reg1=incReg, reg2=indexTr.resultReg, immediate = arrayLength, labelSymbol = "${variable}_lsb")
-                            it += IRInstruction(Opcode.DEC, IRDataType.BYTE, reg1=incReg)
-                            it += IRInstruction(Opcode.STOREX, IRDataType.BYTE, reg1=incReg, reg2=indexTr.resultReg, immediate = arrayLength, labelSymbol = "${variable}_lsb")
-                        }
-                    }
-                    else -> throw AssemblyError("weird operator")
-                }
+                chunk += IRInstruction(Opcode.LOADX, irDt, reg1=incReg, reg2=indexTr.resultReg, labelSymbol=variable)
+                chunk += IRInstruction(operationRegister, irDt, reg1=incReg)
+                chunk += IRInstruction(Opcode.STOREX, irDt, reg1=incReg, reg2=indexTr.resultReg, labelSymbol=variable)
+                result += chunk
             }
-        } else {
-            val ident = postIncrDecr.target.identifier
-            val memory = postIncrDecr.target.memory
-            val irDt = irType(postIncrDecr.target.type)
-            val operationMem: Opcode
-            val operationRegister: Opcode
-            when(postIncrDecr.operator) {
-                "++" -> {
-                    operationMem = Opcode.INCM
-                    operationRegister = Opcode.INC
-                }
-                "--" -> {
-                    operationMem = Opcode.DECM
-                    operationRegister = Opcode.DEC
-                }
-                else -> throw AssemblyError("weird operator")
-            }
-            if(ident!=null) {
-                addInstr(result, IRInstruction(operationMem, irDt, labelSymbol = ident.name), null)
-            } else if(memory!=null) {
-                if(memory.address is PtNumber) {
-                    val address = (memory.address as PtNumber).number.toInt()
-                    addInstr(result, IRInstruction(operationMem, irDt, address = address), null)
-                } else {
-                    val tr = expressionEval.translateExpression(memory.address)
-                    addToResult(result, tr, tr.resultReg, -1)
-                    result += IRCodeChunk(null, null).also {
-                        val incReg = registers.nextFree()
-                        it += IRInstruction(Opcode.LOADI, irDt, reg1 = incReg, reg2 = tr.resultReg)
-                        it += IRInstruction(operationRegister, irDt, reg1 = incReg)
-                        it += IRInstruction(Opcode.STOREI, irDt, reg1 = incReg, reg2 = tr.resultReg)
-                    }
-                }
-            } else if (array!=null) {
-                val variable = array.variable.name
-                val itemsize = program.memsizer.memorySize(array.type)
-                val fixedIndex = constIntValue(array.index)
-                if(fixedIndex!=null) {
-                    val offset = fixedIndex*itemsize
-                    addInstr(result, IRInstruction(operationMem, irDt, labelSymbol="$variable+$offset"), null)
-                } else {
-                    val indexTr = expressionEval.translateExpression(array.index)
-                    addToResult(result, indexTr, indexTr.resultReg, -1)
-                    if(itemsize>1)
-                        result += multiplyByConst(IRDataType.BYTE, indexTr.resultReg, itemsize)
-                    result += IRCodeChunk(null, null).also {
-                        val incReg = registers.nextFree()
-                        it += IRInstruction(Opcode.LOADX, irDt, reg1=incReg, reg2=indexTr.resultReg, labelSymbol=variable)
-                        it += IRInstruction(operationRegister, irDt, reg1=incReg)
-                        it += IRInstruction(Opcode.STOREX, irDt, reg1=incReg, reg2=indexTr.resultReg, labelSymbol=variable)
-                    }
-                }
-            } else
-                throw AssemblyError("weird assigntarget")
-        }
+        } else
+            throw AssemblyError("weird assigntarget")
 
         return result
     }
@@ -1501,41 +1423,29 @@ class IRCodeGen(
         val result = mutableListOf<IRCodeChunkBase>()
         val countTr = expressionEval.translateExpression(repeat.count)
         addToResult(result, countTr, countTr.resultReg, -1)
-        if(constIntValue(repeat.count)==null) {
-            // check if the counter is already zero
-            addInstr(result, IRInstruction(Opcode.BEQ, irDt, reg1=countTr.resultReg, immediate = 0, labelSymbol = skipRepeatLabel), null)
-        }
+        addInstr(result, IRInstruction(Opcode.BEQ, irDt, reg1=countTr.resultReg, immediate = 0, labelSymbol = skipRepeatLabel), null)
         result += labelFirstChunk(translateNode(repeat.statements), repeatLabel)
-        result += IRCodeChunk(null, null).also {
-            it += IRInstruction(Opcode.DEC, irDt, reg1 = countTr.resultReg)
-            it += IRInstruction(Opcode.BNE, irDt, reg1 = countTr.resultReg, immediate = 0, labelSymbol = repeatLabel)
-        }
+        val chunk = IRCodeChunk(null, null)
+        chunk += IRInstruction(Opcode.DEC, irDt, reg1=countTr.resultReg)
+        chunk += IRInstruction(Opcode.BNE, irDt, reg1=countTr.resultReg, immediate = 0, labelSymbol = repeatLabel)
+        result += chunk
         result += IRCodeChunk(skipRepeatLabel, null)
         return result
     }
 
     private fun translate(jump: PtJump): IRCodeChunks {
         val result = mutableListOf<IRCodeChunkBase>()
-        val chunk = IRCodeChunk(null, null)
-        if(jump.address!=null) {
-            chunk += IRInstruction(Opcode.JUMP, address = jump.address!!.toInt())
+        val instr = if(jump.address!=null) {
+            IRInstruction(Opcode.JUMPA, address = jump.address!!.toInt())
         } else {
             if (jump.generatedLabel != null)
-                chunk += IRInstruction(Opcode.JUMP, labelSymbol = jump.generatedLabel!!)
-            else if (jump.identifier != null) {
-                val symbol = symbolTable.lookup(jump.identifier!!.name)
-                if(symbol?.type==StNodeType.MEMVAR || symbol?.type==StNodeType.STATICVAR) {
-                    val jumpReg = registers.nextFree()
-                    chunk += IRInstruction(Opcode.LOAD, IRDataType.WORD, reg1 = jumpReg, labelSymbol = jump.identifier!!.name)
-                    chunk += IRInstruction(Opcode.JUMPI, reg1 = jumpReg)
-                } else {
-                    chunk += IRInstruction(Opcode.JUMP, labelSymbol = jump.identifier!!.name)
-                }
-            }
+                IRInstruction(Opcode.JUMP, labelSymbol = jump.generatedLabel!!)
+            else if (jump.identifier != null)
+                IRInstruction(Opcode.JUMP, labelSymbol = jump.identifier!!.name)
             else
                 throw AssemblyError("weird jump")
         }
-        result += chunk
+        addInstr(result, instr, null)
         return result
     }
 
@@ -1623,7 +1533,7 @@ class IRCodeGen(
     private fun translate(parameters: List<PtSubroutineParameter>) =
         parameters.map {
             val flattenedName = it.definingSub()!!.name + "." + it.name
-            val orig = symbolTable.lookup(flattenedName) as StStaticVariable
+            val orig = symbolTable.flat.getValue(flattenedName) as StStaticVariable
             IRSubroutine.IRParam(flattenedName, orig.dt)
         }
 

codeGenIntermediate/src/prog8/codegen/intermediate/IRPeepholeOptimizer.kt

@@ -23,7 +23,7 @@ class IRPeepholeOptimizer(private val irprog: IRProgram) {
     }
 
     private fun optimizeOnlyJoinChunks() {
-        irprog.foreachSub { sub ->
+        irprog.blocks.asSequence().flatMap { it.children.filterIsInstance<IRSubroutine>() }.forEach { sub ->
             joinChunks(sub)
             removeEmptyChunks(sub)
             joinChunks(sub)
@@ -32,11 +32,10 @@ class IRPeepholeOptimizer(private val irprog: IRProgram) {
     }
 
     private fun peepholeOptimize() {
-        irprog.foreachSub { sub ->
+        irprog.blocks.asSequence().flatMap { it.children.filterIsInstance<IRSubroutine>() }.forEach { sub ->
             joinChunks(sub)
             removeEmptyChunks(sub)
             joinChunks(sub)
-
             sub.chunks.withIndex().forEach { (index, chunk1) ->
                 // we don't optimize Inline Asm chunks here.
                 val chunk2 = if(index<sub.chunks.size-1) sub.chunks[index+1] else null
@@ -47,19 +46,17 @@ class IRPeepholeOptimizer(private val irprog: IRProgram) {
                         val changed = removeNops(chunk1, indexedInstructions)
                                 || removeDoubleLoadsAndStores(chunk1, indexedInstructions)       // TODO not yet implemented
                                 || removeUselessArithmetic(chunk1, indexedInstructions)
-                                || removeNeedlessCompares(chunk1, indexedInstructions)
                                 || removeWeirdBranches(chunk1, chunk2, indexedInstructions)
                                 || removeDoubleSecClc(chunk1, indexedInstructions)
                                 || cleanupPushPop(chunk1, indexedInstructions)
-                        // TODO other optimizations
+                        // TODO other optimizations:
+                        //  more complex optimizations such as unused registers
                     } while (changed)
                 }
             }
             removeEmptyChunks(sub)
         }
 
-        // TODO also do register optimization step here at the end?
-
         irprog.linkChunks()  // re-link
     }
 
@@ -267,28 +264,6 @@ class IRPeepholeOptimizer(private val irprog: IRProgram) {
         return changed
     }
 
-    private fun removeNeedlessCompares(chunk: IRCodeChunk, indexedInstructions: List<IndexedValue<IRInstruction>>): Boolean {
-        // a CMPI with 0, after an instruction like LOAD that already sets the status bits, can be removed.
-        // but only if the instruction after it is not using the Carry bit because that won't be set by a LOAD instruction etc.
-        var changed = false
-        indexedInstructions.reversed().forEach { (idx, ins) ->
-            if(idx>0 && idx<(indexedInstructions.size-1) && ins.opcode==Opcode.CMPI && ins.immediate==0) {
-                val previous = indexedInstructions[idx-1].value
-                if(previous.opcode in OpcodesThatSetStatusbitsIncludingCarry) {
-                    chunk.instructions.removeAt(idx)
-                    changed = true
-                } else if(previous.opcode in OpcodesThatSetStatusbitsButNotCarry) {
-                    val next = indexedInstructions[idx+1].value
-                    if(next.opcode !in arrayOf(Opcode.BSTCC, Opcode.BSTCS, Opcode.BSTPOS, Opcode.BSTNEG)) {
-                        chunk.instructions.removeAt(idx)
-                        changed = true
-                    }
-                }
-            }
-        }
-        return changed
-    }
-
     private fun removeUselessArithmetic(chunk: IRCodeChunk, indexedInstructions: List<IndexedValue<IRInstruction>>): Boolean {
         // note: this is hard to solve for the non-immediate instructions atm because the values are loaded into registers first
         var changed = false

codeGenIntermediate/src/prog8/codegen/intermediate/IRRegisterOptimizer.kt

@@ -1,103 +0,0 @@
-package prog8.codegen.intermediate
-
-import prog8.intermediate.IRProgram
-
-
-class IRRegisterOptimizer(private val irProg: IRProgram) {
-    fun optimize() {
-        // reuseRegisters()
-    }
-
-/*
-    TODO: this register re-use renumbering isn't going to work like this,
-    because subroutines will be clobbering the registers that the subroutine
-    which is calling them might be using...
-
-
-    private fun reuseRegisters() {
-
-        fun addToUsage(usage: MutableMap<Pair<Int, IRDataType>, MutableSet<IRCodeChunkBase>>,
-                       regnum: Int,
-                       dt: IRDataType,
-                       chunk: IRCodeChunkBase) {
-            val key = regnum to dt
-            val chunks = usage[key] ?: mutableSetOf()
-            chunks.add(chunk)
-            usage[key] = chunks
-        }
-
-        val usage: MutableMap<Pair<Int, IRDataType>, MutableSet<IRCodeChunkBase>> = mutableMapOf()
-
-        irProg.foreachCodeChunk { chunk ->
-            chunk.usedRegisters().regsTypes.forEach { (regNum, types) ->
-                types.forEach { dt ->
-                    addToUsage(usage, regNum, dt, chunk)
-                }
-            }
-        }
-
-        val registerReplacements = usage.asSequence()
-            .filter { it.value.size==1 }
-            .map { it.key to it.value.iterator().next() }
-            .groupBy({ it.second }, {it.first})
-            .asSequence()
-            .associate { (chunk, registers) ->
-                chunk to registers.withIndex().associate { (index, reg) -> reg to 50000+index }
-            }
-
-        registerReplacements.forEach { replaceRegisters(it.key, it.value) }
-    }
-
-    private fun replaceRegisters(chunk: IRCodeChunkBase, replacements: Map<Pair<Int, IRDataType>, Int>) {
-        val (rF, rI) = replacements.asSequence().partition { it.key.second==IRDataType.FLOAT }
-        val replacementsInt = rI.associate { it.key.first to it.value }
-        val replacementsFloat = rF.associate { it.key.first to it.value }
-
-        fun replaceRegs(fcallArgs: FunctionCallArgs?): FunctionCallArgs? {
-            if(fcallArgs==null)
-                return null
-            val args = if(fcallArgs.arguments.isEmpty()) fcallArgs.arguments else {
-                fcallArgs.arguments.map {
-                    FunctionCallArgs.ArgumentSpec(
-                        it.name,
-                        it.address,
-                        FunctionCallArgs.RegSpec(
-                            it.reg.dt,
-                            if(it.reg.dt==IRDataType.FLOAT)
-                                replacementsFloat.getOrDefault(it.reg.registerNum, it.reg.registerNum)
-                            else
-                                replacementsInt.getOrDefault(it.reg.registerNum, it.reg.registerNum),
-                            it.reg.cpuRegister
-                        )
-                    )
-                }
-            }
-            val rt = fcallArgs.returns
-            val returns = if(rt==null) null else {
-                FunctionCallArgs.RegSpec(
-                    rt.dt,
-                    if(rt.dt==IRDataType.FLOAT)
-                        replacementsFloat.getOrDefault(rt.registerNum, rt.registerNum)
-                    else
-                        replacementsInt.getOrDefault(rt.registerNum, rt.registerNum),
-                    rt.cpuRegister
-                )
-            }
-            return FunctionCallArgs(args, returns)
-        }
-
-        fun replaceRegs(instruction: IRInstruction): IRInstruction {
-            val reg1 = replacementsInt.getOrDefault(instruction.reg1, instruction.reg1)
-            val reg2 = replacementsInt.getOrDefault(instruction.reg2, instruction.reg2)
-            val fpReg1 = replacementsFloat.getOrDefault(instruction.fpReg1, instruction.fpReg1)
-            val fpReg2 = replacementsFloat.getOrDefault(instruction.fpReg2, instruction.fpReg2)
-            return instruction.copy(reg1 = reg1, reg2 = reg2, fpReg1 = fpReg1, fpReg2 = fpReg2, fcallArgs = replaceRegs(instruction.fcallArgs))
-        }
-        val newInstructions = chunk.instructions.map {
-            replaceRegs(it)
-        }
-        chunk.instructions.clear()
-        chunk.instructions.addAll(newInstructions)
-    }
-*/
-}

codeGenIntermediate/src/prog8/codegen/intermediate/IRUnusedCodeRemover.kt

@@ -16,7 +16,7 @@ class IRUnusedCodeRemover(
         irprog.blocks.reversed().forEach { block ->
             if(block.isEmpty()) {
                 irprog.blocks.remove(block)
-                pruneSymboltable(block.label)
+                irprog.st.removeTree(block.label)
                 numRemoved++
             }
         }
@@ -24,26 +24,12 @@ class IRUnusedCodeRemover(
         return numRemoved
     }
 
-    private fun pruneSymboltable(blockLabel: String) {
-        // we could clean up the SymbolTable as well, but ONLY if these symbols aren't referenced somewhere still in an instruction
-        val prefix = "$blockLabel."
-        val blockVars = irprog.st.allVariables().filter { it.name.startsWith(prefix) }
-        blockVars.forEach { stVar ->
-            irprog. allSubs().flatMap { it.chunks }.forEach { chunk ->
-                chunk.instructions.forEach { ins ->
-                    if(ins.labelSymbol == stVar.name) {
-                        return
-                    }
-                }
-            }
-        }
-        irprog.st.removeTree(blockLabel)
-    }
-
     private fun removeUnusedSubroutines(): Int {
         val allLabeledChunks = mutableMapOf<String, IRCodeChunkBase>()
-        irprog.foreachCodeChunk { chunk ->
-            chunk.label?.let { allLabeledChunks[it] = chunk }
+        irprog.blocks.asSequence().flatMap { it.children.filterIsInstance<IRSubroutine>() }.forEach { sub ->
+            sub.chunks.forEach { chunk ->
+                chunk.label?.let { allLabeledChunks[it] = chunk }
+            }
         }
 
         var numRemoved = removeSimpleUnlinked(allLabeledChunks) + removeUnreachable(allLabeledChunks)
@@ -111,10 +97,12 @@ class IRUnusedCodeRemover(
         }
 
         // check if asmsub is linked or called from another regular subroutine
-        irprog.foreachCodeChunk { chunk ->
-            chunk.instructions.forEach {
-                it.labelSymbol?.let { label -> allSubs[label]?.let { cc -> linkedAsmSubs += cc } }
-                // note: branchTarget can't yet point to another IRAsmSubroutine, so do nothing when it's set
+        irprog.blocks.asSequence().flatMap { it.children.filterIsInstance<IRSubroutine>() }.forEach { sub ->
+            sub.chunks.forEach { chunk ->
+                chunk.instructions.forEach {
+                    it.labelSymbol?.let { label -> allSubs[label]?.let { cc -> linkedAsmSubs += cc } }
+                    // note: branchTarget can't yet point to another IRAsmSubroutine, so do nothing when it's set
+                }
             }
         }
 
@@ -135,22 +123,9 @@ class IRUnusedCodeRemover(
     }
 
     private fun removeUnreachable(allLabeledChunks: MutableMap<String, IRCodeChunkBase>): Int {
-        val entrypointSub = irprog.blocks.single { it.label=="main" }
-            .children.single { it is IRSubroutine && it.label=="main.start" }
+        val entrypointSub = irprog.blocks.single { it.label=="main" }.children.single { it is IRSubroutine && it.label=="main.start" }
         val reachable = mutableSetOf((entrypointSub as IRSubroutine).chunks.first())
 
-        // all chunks referenced in array initializer values are also 'reachable':
-        irprog.st.allVariables()
-            .filter { !it.uninitialized }
-            .forEach {
-                it.onetimeInitializationArrayValue?.let { array ->
-                    array.forEach {elt ->
-                        if(elt.addressOfSymbol!=null && irprog.st.lookup(elt.addressOfSymbol!!)==null)
-                            reachable.add(irprog.getChunkWithLabel(elt.addressOfSymbol!!))
-                    }
-                }
-            }
-
         fun grow() {
             val new = mutableSetOf<IRCodeChunkBase>()
             reachable.forEach {
@@ -179,29 +154,19 @@ class IRUnusedCodeRemover(
     private fun removeSimpleUnlinked(allLabeledChunks: Map<String, IRCodeChunkBase>): Int {
         val linkedChunks = mutableSetOf<IRCodeChunkBase>()
 
-        // all chunks referenced in array initializer values are linked as well!:
-        irprog.st.allVariables()
-            .filter { !it.uninitialized }
-            .forEach {
-                it.onetimeInitializationArrayValue?.let { array ->
-                    array.forEach {elt ->
-                        if(elt.addressOfSymbol!=null && irprog.st.lookup(elt.addressOfSymbol!!)==null)
-                            linkedChunks += irprog.getChunkWithLabel(elt.addressOfSymbol!!)
+        irprog.blocks.asSequence().flatMap { it.children.filterIsInstance<IRSubroutine>() }.forEach { sub ->
+            sub.chunks.forEach { chunk ->
+                chunk.next?.let { next -> linkedChunks += next }
+                chunk.instructions.forEach {
+                    if(it.branchTarget==null) {
+                        it.labelSymbol?.let { label -> allLabeledChunks[label]?.let { cc -> linkedChunks += cc } }
+                    } else {
+                        linkedChunks += it.branchTarget!!
                     }
                 }
+                if (chunk.label == "main.start")
+                    linkedChunks += chunk
             }
-
-        irprog.foreachCodeChunk { chunk ->
-            chunk.next?.let { next -> linkedChunks += next }
-            chunk.instructions.forEach {
-                if(it.branchTarget==null) {
-                    it.labelSymbol?.let { label -> allLabeledChunks[label]?.let { cc -> linkedChunks += cc } }
-                } else {
-                    linkedChunks += it.branchTarget!!
-                }
-            }
-            if (chunk.label == "main.start")
-                linkedChunks += chunk
         }
 
         return removeUnlinkedChunks(linkedChunks)
@@ -211,7 +176,7 @@ class IRUnusedCodeRemover(
         linkedChunks: Set<IRCodeChunkBase>
     ): Int {
         var numRemoved = 0
-        irprog.foreachSub { sub ->
+        irprog.blocks.asSequence().flatMap { it.children.filterIsInstance<IRSubroutine>() }.forEach { sub ->
             sub.chunks.withIndex().reversed().forEach { (index, chunk) ->
                 if (chunk !in linkedChunks) {
                     if (chunk === sub.chunks[0]) {

codeGenIntermediate/test/Dummies.kt

@@ -43,10 +43,6 @@ internal class ErrorReporterForTests(private val throwExceptionAtReportIfErrors:
             warnings.add(text)
     }
 
-    override fun undefined(symbol: List<String>, position: Position) {
-        err("undefined symbol: ${symbol.joinToString(".")}", position)
-    }
-
     override fun noErrors(): Boolean  = errors.isEmpty()
 
     override fun report() {

codeGenIntermediate/test/TestIRPeepholeOpt.kt

@@ -36,7 +36,7 @@ class TestIRPeepholeOpt: FunSpec({
         return makeIRProgram(listOf(chunk))
     }
 
-    fun IRProgram.chunks(): List<IRCodeChunkBase> = this.allSubs().flatMap { it.chunks }.toList()
+    fun IRProgram.chunks(): List<IRCodeChunkBase> = this.blocks.flatMap { it.children.filterIsInstance<IRSubroutine>() }.flatMap { it.chunks }
 
     test("remove nops") {
         val irProg = makeIRProgram(listOf(

codeGenIntermediate/test/TestVmCodeGen.kt

@@ -41,7 +41,7 @@ class TestVmCodeGen: FunSpec({
 //}
         val codegen = VmCodeGen()
         val program = PtProgram("test", DummyMemsizer, DummyStringEncoder)
-        val block = PtBlock("main", null, false, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
+        val block = PtBlock("main", null, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
         val sub = PtSub("start", emptyList(), null, Position.DUMMY)
         sub.add(PtVariable("pi", DataType.UBYTE, ZeropageWish.DONTCARE, PtNumber(DataType.UBYTE, 0.0, Position.DUMMY), null, Position.DUMMY))
         sub.add(PtVariable("particleX", DataType.ARRAY_UB, ZeropageWish.DONTCARE, null, 3u, Position.DUMMY))
@@ -91,7 +91,7 @@ class TestVmCodeGen: FunSpec({
         program.add(block)
 
         // define the "cx16.r0" virtual register
-        val cx16block = PtBlock("cx16", null, false, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
+        val cx16block = PtBlock("cx16", null, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
         cx16block.add(PtMemMapped("r0", DataType.UWORD, 100u, null, Position.DUMMY))
         program.add(cx16block)
 
@@ -120,7 +120,7 @@ class TestVmCodeGen: FunSpec({
 //}
         val codegen = VmCodeGen()
         val program = PtProgram("test", DummyMemsizer, DummyStringEncoder)
-        val block = PtBlock("main", null, false, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
+        val block = PtBlock("main", null, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
         val sub = PtSub("start", emptyList(), null, Position.DUMMY)
         sub.add(PtVariable("f1", DataType.FLOAT, ZeropageWish.DONTCARE, null, null, Position.DUMMY))
         val if1 = PtIfElse(Position.DUMMY)
@@ -183,7 +183,7 @@ class TestVmCodeGen: FunSpec({
 //}
         val codegen = VmCodeGen()
         val program = PtProgram("test", DummyMemsizer, DummyStringEncoder)
-        val block = PtBlock("main", null, false, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
+        val block = PtBlock("main", null, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
         val sub = PtSub("start", emptyList(), null, Position.DUMMY)
         sub.add(PtVariable("f1", DataType.FLOAT, ZeropageWish.DONTCARE, null, null, Position.DUMMY))
         val if1 = PtIfElse(Position.DUMMY)
@@ -242,7 +242,7 @@ class TestVmCodeGen: FunSpec({
 //}
         val codegen = VmCodeGen()
         val program = PtProgram("test", DummyMemsizer, DummyStringEncoder)
-        val block = PtBlock("main", null, false, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
+        val block = PtBlock("main", null, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
         val sub = PtSub("start", emptyList(), null, Position.DUMMY)
         sub.add(PtVariable("f1", DataType.FLOAT, ZeropageWish.DONTCARE, null, null, Position.DUMMY))
         val if1 = PtIfElse(Position.DUMMY)
@@ -289,7 +289,7 @@ class TestVmCodeGen: FunSpec({
 //}
         val codegen = VmCodeGen()
         val program = PtProgram("test", DummyMemsizer, DummyStringEncoder)
-        val block = PtBlock("main", null, false, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
+        val block = PtBlock("main", null, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
         val sub = PtSub("start", emptyList(), null, Position.DUMMY)
         sub.add(PtVariable("sb1", DataType.BYTE, ZeropageWish.DONTCARE, null, null, Position.DUMMY))
         val if1 = PtIfElse(Position.DUMMY)
@@ -352,7 +352,7 @@ class TestVmCodeGen: FunSpec({
 //}
         val codegen = VmCodeGen()
         val program = PtProgram("test", DummyMemsizer, DummyStringEncoder)
-        val block = PtBlock("main", null, false, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
+        val block = PtBlock("main", null, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
         val sub = PtSub("start", emptyList(), null, Position.DUMMY)
         sub.add(PtVariable("sb1", DataType.BYTE, ZeropageWish.DONTCARE, null, null, Position.DUMMY))
         val if1 = PtIfElse(Position.DUMMY)
@@ -411,7 +411,7 @@ class TestVmCodeGen: FunSpec({
 //}
         val codegen = VmCodeGen()
         val program = PtProgram("test", DummyMemsizer, DummyStringEncoder)
-        val block = PtBlock("main", null, false, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
+        val block = PtBlock("main", null, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
         val sub = PtSub("start", emptyList(), null, Position.DUMMY)
         sub.add(PtVariable("ub1", DataType.UBYTE, ZeropageWish.DONTCARE, null, null, Position.DUMMY))
         val if1 = PtIfElse(Position.DUMMY)
@@ -451,7 +451,7 @@ class TestVmCodeGen: FunSpec({
 //}
         val codegen = VmCodeGen()
         val program = PtProgram("test", DummyMemsizer, DummyStringEncoder)
-        val block = PtBlock("main", null, false, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
+        val block = PtBlock("main", null, false, false, PtBlock.BlockAlignment.NONE, SourceCode.Generated("test"), Position.DUMMY)
         val romsub = PtAsmSub("routine", 0x5000u, setOf(CpuRegister.Y), emptyList(), emptyList(), false, Position.DUMMY)
         block.add(romsub)
         val sub = PtSub("start", emptyList(), null, Position.DUMMY)

codeOptimizers/src/prog8/optimizer/ConstantFoldingOptimizer.kt

@@ -3,17 +3,16 @@ package prog8.optimizer
 import prog8.ast.Node
 import prog8.ast.Program
 import prog8.ast.base.FatalAstException
+import prog8.ast.base.UndefinedSymbolError
 import prog8.ast.expressions.*
 import prog8.ast.maySwapOperandOrder
 import prog8.ast.statements.ForLoop
-import prog8.ast.statements.RepeatLoop
 import prog8.ast.statements.VarDecl
 import prog8.ast.statements.VarDeclType
 import prog8.ast.walk.AstWalker
 import prog8.ast.walk.IAstModification
 import prog8.code.core.AssociativeOperators
 import prog8.code.core.DataType
-import kotlin.math.floor
 
 
 class ConstantFoldingOptimizer(private val program: Program) : AstWalker() {
@@ -308,7 +307,7 @@ class ConstantFoldingOptimizer(private val program: Program) : AstWalker() {
         val rangeTo = iterableRange.to as? NumericLiteral
         if(rangeFrom==null || rangeTo==null) return noModifications
 
-        val loopvar = forLoop.loopVar.targetVarDecl(program) ?: return noModifications
+        val loopvar = forLoop.loopVar.targetVarDecl(program) ?: throw UndefinedSymbolError(forLoop.loopVar)
 
         val stepLiteral = iterableRange.step as? NumericLiteral
         when(loopvar.datatype) {
@@ -365,16 +364,6 @@ class ConstantFoldingOptimizer(private val program: Program) : AstWalker() {
         return noModifications
     }
 
-    override fun after(repeatLoop: RepeatLoop, parent: Node): Iterable<IAstModification> {
-        val count = (repeatLoop.iterations as? NumericLiteral)?.number
-        if(count!=null && floor(count)!=count) {
-            val integer = NumericLiteral.optimalInteger(count.toInt(), repeatLoop.position)
-            repeatLoop.iterations = integer
-            integer.linkParents(repeatLoop)
-        }
-        return noModifications
-    }
-
     private class ShuffleOperands(val expr: BinaryExpression,
                                   val exprOperator: String?,
                                   val subExpr: BinaryExpression,

codeOptimizers/src/prog8/optimizer/ConstantIdentifierReplacer.kt

@@ -53,8 +53,7 @@ class VarConstantValueTypeAdjuster(private val program: Program, private val err
         }
 
         if(to==null) {
-            val toType = range.to.inferType(program)
-            if(toType.isKnown && !range.to.inferType(program).isInteger)
+            if(!range.to.inferType(program).isInteger)
                 errors.err("range expression to value must be integer", range.to.position)
         } else if(to-to.toInt()>0) {
             errors.err("range expression to value must be integer", range.to.position)
@@ -69,124 +68,6 @@ class VarConstantValueTypeAdjuster(private val program: Program, private val err
 
         return noModifications
     }
-
-    override fun after(functionCallExpr: FunctionCallExpression, parent: Node): Iterable<IAstModification> {
-        // choose specific builtin function for the given types
-        val func = functionCallExpr.target.nameInSource
-        if(func==listOf("clamp")) {
-            val t1 = functionCallExpr.args[0].inferType(program)
-            if(t1.isKnown) {
-                val replaceFunc: String
-                if(t1.isBytes) {
-                    replaceFunc = if(t1.istype(DataType.BYTE)) "clamp__byte" else "clamp__ubyte"
-                } else if(t1.isInteger) {
-                    replaceFunc = if(t1.istype(DataType.WORD)) "clamp__word" else "clamp__uword"
-                } else {
-                    errors.err("clamp builtin not supported for floats, use floats.clamp", functionCallExpr.position)
-                    return noModifications
-                }
-                return listOf(IAstModification.SetExpression({functionCallExpr.target = it as IdentifierReference},
-                    IdentifierReference(listOf(replaceFunc), functionCallExpr.target.position),
-                    functionCallExpr))
-            }
-        }
-        else if(func==listOf("min") || func==listOf("max")) {
-            val t1 = functionCallExpr.args[0].inferType(program)
-            val t2 = functionCallExpr.args[1].inferType(program)
-            if(t1.isKnown && t2.isKnown) {
-                val funcName = func[0]
-                val replaceFunc: String
-                if(t1.isBytes && t2.isBytes) {
-                    replaceFunc = if(t1.istype(DataType.BYTE) || t2.istype(DataType.BYTE))
-                        "${funcName}__byte"
-                    else
-                        "${funcName}__ubyte"
-                } else if(t1.isInteger && t2.isInteger) {
-                    replaceFunc = if(t1.istype(DataType.WORD) || t2.istype(DataType.WORD))
-                        "${funcName}__word"
-                    else
-                        "${funcName}__uword"
-                } else if(t1.isNumeric && t2.isNumeric) {
-                    errors.err("min/max not supported for floats", functionCallExpr.position)
-                    return noModifications
-                } else {
-                    errors.err("expected numeric arguments", functionCallExpr.args[0].position)
-                    return noModifications
-                }
-                return listOf(IAstModification.SetExpression({functionCallExpr.target = it as IdentifierReference},
-                    IdentifierReference(listOf(replaceFunc), functionCallExpr.target.position),
-                    functionCallExpr))
-            }
-        }
-        else if(func==listOf("abs")) {
-            val t1 = functionCallExpr.args[0].inferType(program)
-            if(t1.isKnown) {
-                val dt = t1.getOrElse { throw InternalCompilerException("invalid dt") }
-                val replaceFunc = when(dt) {
-                    DataType.BYTE -> "abs__byte"
-                    DataType.WORD -> "abs__word"
-                    DataType.FLOAT -> "abs__float"
-                    DataType.UBYTE, DataType.UWORD -> {
-                        return listOf(IAstModification.ReplaceNode(functionCallExpr, functionCallExpr.args[0], parent))
-                    }
-                    else -> {
-                        errors.err("expected numeric argument", functionCallExpr.args[0].position)
-                        return noModifications
-                    }
-                }
-                return listOf(IAstModification.SetExpression({functionCallExpr.target = it as IdentifierReference},
-                    IdentifierReference(listOf(replaceFunc), functionCallExpr.target.position),
-                    functionCallExpr))
-            }
-        }
-        else if(func==listOf("sqrt")) {
-            val t1 = functionCallExpr.args[0].inferType(program)
-            if(t1.isKnown) {
-                val dt = t1.getOrElse { throw InternalCompilerException("invalid dt") }
-                val replaceFunc = when(dt) {
-                    DataType.UBYTE -> "sqrt__ubyte"
-                    DataType.UWORD -> "sqrt__uword"
-                    DataType.FLOAT -> "sqrt__float"
-                    else -> {
-                        errors.err("expected unsigned or float numeric argument", functionCallExpr.args[0].position)
-                        return noModifications
-                    }
-                }
-                return listOf(IAstModification.SetExpression({functionCallExpr.target = it as IdentifierReference},
-                    IdentifierReference(listOf(replaceFunc), functionCallExpr.target.position),
-                    functionCallExpr))
-            }
-        }
-        return noModifications
-    }
-
-    override fun after(functionCallStatement: FunctionCallStatement, parent: Node): Iterable<IAstModification> {
-        // choose specific builtin function for the given types
-        val func = functionCallStatement.target.nameInSource
-        if(func==listOf("divmod")) {
-            val argTypes = functionCallStatement.args.map {it.inferType(program)}.toSet()
-            if(argTypes.size!=1) {
-                errors.err("expected all ubyte or all uword arguments", functionCallStatement.args[0].position)
-                return noModifications
-            }
-            val t1 = argTypes.single()
-            if(t1.isKnown) {
-                val dt = t1.getOrElse { throw InternalCompilerException("invalid dt") }
-                val replaceFunc = when(dt) {
-                    DataType.UBYTE -> "divmod__ubyte"
-                    DataType.UWORD -> "divmod__uword"
-                    else -> {
-                        errors.err("expected all ubyte or all uword arguments", functionCallStatement.args[0].position)
-                        return noModifications
-                    }
-                }
-                return listOf(IAstModification.SetExpression({functionCallStatement.target = it as IdentifierReference},
-                    IdentifierReference(listOf(replaceFunc), functionCallStatement.target.position),
-                    functionCallStatement))
-            }
-        }
-        return noModifications
-    }
 }
 
 
@@ -276,7 +157,7 @@ internal class ConstantIdentifierReplacer(private val program: Program, private
                         return listOf(IAstModification.ReplaceNode(decl.value!!, newValue, decl))
                     }
                 }
-                DataType.ARRAY_UB, DataType.ARRAY_B, DataType.ARRAY_UW, DataType.ARRAY_W, DataType.ARRAY_W_SPLIT, DataType.ARRAY_UW_SPLIT -> {
+                DataType.ARRAY_UB, DataType.ARRAY_B, DataType.ARRAY_UW, DataType.ARRAY_W -> {
                     val rangeExpr = decl.value as? RangeExpression
                     if(rangeExpr!=null) {
                         // convert the initializer range expression to an actual array

codeOptimizers/src/prog8/optimizer/ExpressionSimplifier.kt

@@ -18,7 +18,7 @@ import kotlin.math.abs
 import kotlin.math.log2
 import kotlin.math.pow
 
-// TODO add more peephole expression optimizations? Investigate what optimizations binaryen has?
+// TODO add more peephole expression optimizations? Investigate what optimizations binaryen has
 
 class ExpressionSimplifier(private val program: Program,
                            private val errors: IErrorReporter,

codeOptimizers/src/prog8/optimizer/Extensions.kt

@@ -43,9 +43,9 @@ fun Program.constantFold(errors: IErrorReporter, compTarget: ICompilationTarget)
 
 fun Program.optimizeStatements(errors: IErrorReporter,
                                functions: IBuiltinFunctions,
-                               options: CompilationOptions
+                               compTarget: ICompilationTarget
 ): Int {
-    val optimizer = StatementOptimizer(this, errors, functions, options)
+    val optimizer = StatementOptimizer(this, errors, functions, compTarget)
     optimizer.visit(this)
     val optimizationCount = optimizer.applyModifications()
 
@@ -54,8 +54,8 @@ fun Program.optimizeStatements(errors: IErrorReporter,
     return optimizationCount
 }
 
-fun Program.inlineSubroutines(options: CompilationOptions): Int {
-    val inliner = Inliner(this, options)
+fun Program.inlineSubroutines(): Int {
+    val inliner = Inliner(this)
     inliner.visit(this)
     return inliner.applyModifications()
 }

codeOptimizers/src/prog8/optimizer/Inliner.kt

@@ -8,9 +8,7 @@ import prog8.ast.statements.*
 import prog8.ast.walk.AstWalker
 import prog8.ast.walk.IAstModification
 import prog8.ast.walk.IAstVisitor
-import prog8.code.core.CompilationOptions
 import prog8.code.core.InternalCompilerException
-import prog8.code.target.VMTarget
 
 
 private  fun isEmptyReturn(stmt: Statement): Boolean = stmt is Return && stmt.value==null
@@ -18,7 +16,7 @@ private  fun isEmptyReturn(stmt: Statement): Boolean = stmt is Return && stmt.va
 
 // inliner potentially enables *ONE LINED* subroutines, wihtout to be inlined.
 
-class Inliner(private val program: Program, private val options: CompilationOptions): AstWalker() {
+class Inliner(val program: Program): AstWalker() {
 
     class DetermineInlineSubs(val program: Program): IAstVisitor {
         private val modifications = mutableListOf<IAstModification>()
@@ -213,7 +211,7 @@ class Inliner(private val program: Program, private val options: CompilationOpti
 
     override fun after(functionCallStatement: FunctionCallStatement, parent: Node): Iterable<IAstModification>  {
         val sub = functionCallStatement.target.targetStatement(program) as? Subroutine
-        return if(sub==null || !canInline(sub, functionCallStatement))
+        return if(sub==null)
             noModifications
         else
             possibleInlineFcallStmt(sub, functionCallStatement, parent)
@@ -221,7 +219,7 @@ class Inliner(private val program: Program, private val options: CompilationOpti
 
     override fun before(functionCallExpr: FunctionCallExpression, parent: Node): Iterable<IAstModification> {
         val sub = functionCallExpr.target.targetStatement(program) as? Subroutine
-        if(sub!=null && sub.inline && sub.parameters.isEmpty() && canInline(sub, functionCallExpr)) {
+        if(sub!=null && sub.inline && sub.parameters.isEmpty()) {
             require(sub.statements.size == 1 || (sub.statements.size == 2 && isEmptyReturn(sub.statements[1]))) {
                 "invalid inline sub at ${sub.position}"
             }
@@ -248,17 +246,5 @@ class Inliner(private val program: Program, private val options: CompilationOpti
         return noModifications
     }
 
-    private fun canInline(sub: Subroutine, fcall: IFunctionCall): Boolean {
-        if(!sub.inline)
-            return false
-        if(options.compTarget.name!=VMTarget.NAME) {
-            val stmt = sub.statements.single()
-            if (stmt is IFunctionCall) {
-                val existing = (fcall as Node).definingScope.lookup(stmt.target.nameInSource.take(1))
-                return existing !is VarDecl
-            }
-        }
-        return true
-    }
 }
 

codeOptimizers/src/prog8/optimizer/StatementOptimizer.kt

@@ -13,7 +13,7 @@ import kotlin.math.floor
 class StatementOptimizer(private val program: Program,
                          private val errors: IErrorReporter,
                          private val functions: IBuiltinFunctions,
-                         private val options: CompilationOptions
+                         private val compTarget: ICompilationTarget
 ) : AstWalker() {
 
     override fun after(functionCallStatement: FunctionCallStatement, parent: Node): Iterable<IAstModification> {
@@ -39,7 +39,7 @@ class StatementOptimizer(private val program: Program,
                 if(string!=null) {
                     val pos = functionCallStatement.position
                     if (string.value.length == 1) {
-                        val firstCharEncoded = options.compTarget.encodeString(string.value, string.encoding)[0]
+                        val firstCharEncoded = compTarget.encodeString(string.value, string.encoding)[0]
                         val chrout = FunctionCallStatement(
                             IdentifierReference(listOf("txt", "chrout"), pos),
                             mutableListOf(NumericLiteral(DataType.UBYTE, firstCharEncoded.toDouble(), pos)),
@@ -51,7 +51,7 @@ class StatementOptimizer(private val program: Program,
                             IAstModification.Remove(stringDecl, stringDecl.parent as IStatementContainer)
                         )
                     } else if (string.value.length == 2) {
-                        val firstTwoCharsEncoded = options.compTarget.encodeString(string.value.take(2), string.encoding)
+                        val firstTwoCharsEncoded = compTarget.encodeString(string.value.take(2), string.encoding)
                         val chrout1 = FunctionCallStatement(
                             IdentifierReference(listOf("txt", "chrout"), pos),
                             mutableListOf(NumericLiteral(DataType.UBYTE, firstTwoCharsEncoded[0].toDouble(), pos)),
@@ -108,16 +108,6 @@ class StatementOptimizer(private val program: Program,
             }
         }
 
-        // remove obvious dangling elses (else after a return)
-        if(ifElse.elsepart.isNotEmpty() && ifElse.truepart.statements.singleOrNull() is Return) {
-            val elsePart = AnonymousScope(ifElse.elsepart.statements, ifElse.elsepart.position)
-            if(options.slowCodegenWarnings)
-                errors.warn("else can be omitted", ifElse.elsepart.position)
-            return listOf(
-                IAstModification.ReplaceNode(ifElse.elsepart, AnonymousScope(mutableListOf(), ifElse.elsepart.position), ifElse),
-                IAstModification.InsertAfter(ifElse, elsePart, parent as IStatementContainer)
-            )
-        }
         return noModifications
     }
 
@@ -151,7 +141,7 @@ class StatementOptimizer(private val program: Program,
                 val size = sv.value.length
                 if(size==1) {
                     // loop over string of length 1 -> just assign the single character
-                    val character = options.compTarget.encodeString(sv.value, sv.encoding)[0]
+                    val character = compTarget.encodeString(sv.value, sv.encoding)[0]
                     val byte = NumericLiteral(DataType.UBYTE, character.toDouble(), iterable.position)
                     val scope = AnonymousScope(mutableListOf(), forLoop.position)
                     scope.statements.add(Assignment(AssignTarget(forLoop.loopVar, null, null, forLoop.position), byte, AssignmentOrigin.OPTIMIZER, forLoop.position))
@@ -176,6 +166,16 @@ class StatementOptimizer(private val program: Program,
             }
         }
 
+        val iterationCount = forLoop.constIterationCount(program)
+        if(iterationCount!=null) {
+            val loopName = forLoop.loopVar.nameInSource
+            if(!forLoop.iterable.referencesIdentifier(loopName) && !forLoop.body.referencesIdentifier(loopName)) {
+                errors.warn("for loop can be replaced with repeat loop", forLoop.position)
+                val repeat = RepeatLoop(NumericLiteral.optimalNumeric(iterationCount, forLoop.position), forLoop.body, forLoop.position)
+                return listOf(IAstModification.ReplaceNode(forLoop, repeat, parent))
+            }
+        }
+
         return noModifications
     }
 
@@ -326,7 +326,7 @@ class StatementOptimizer(private val program: Program,
                         if (rightCv == 0.0) {
                             return listOf(IAstModification.Remove(assignment, parent as IStatementContainer))
                         } else if (targetDt in IntegerDatatypes && floor(rightCv) == rightCv) {
-                            if (vardeclDt != VarDeclType.MEMORY && rightCv in 1.0..3.0 && options.compTarget.name!=VMTarget.NAME) {
+                            if (vardeclDt != VarDeclType.MEMORY && rightCv in 1.0..3.0 && compTarget.name!=VMTarget.NAME) {
                                 // replace by several INCs if it's not a memory address (inc on a memory mapped register doesn't work very well)
                                 val incs = AnonymousScope(mutableListOf(), assignment.position)
                                 repeat(rightCv.toInt()) {
@@ -340,7 +340,7 @@ class StatementOptimizer(private val program: Program,
                         if (rightCv == 0.0) {
                             return listOf(IAstModification.Remove(assignment, parent as IStatementContainer))
                         } else if (targetDt in IntegerDatatypes && floor(rightCv) == rightCv) {
-                            if (vardeclDt != VarDeclType.MEMORY && rightCv in 1.0..3.0 && options.compTarget.name!=VMTarget.NAME) {
+                            if (vardeclDt != VarDeclType.MEMORY && rightCv in 1.0..3.0 && compTarget.name!=VMTarget.NAME) {
                                 // replace by several DECs if it's not a memory address (dec on a memory mapped register doesn't work very well)
                                 val decs = AnonymousScope(mutableListOf(), assignment.position)
                                 repeat(rightCv.toInt()) {
@@ -391,47 +391,4 @@ class StatementOptimizer(private val program: Program,
         else
             noModifications
     }
-
-    override fun after(whenStmt: When, parent: Node): Iterable<IAstModification> {
-
-        fun replaceWithIf(condition: Expression, trueBlock: AnonymousScope, elseBlock: AnonymousScope?): List<IAstModification> {
-            val ifStmt = IfElse(condition, trueBlock, elseBlock ?: AnonymousScope(mutableListOf(), whenStmt.position), whenStmt.position)
-            errors.warn("for boolean condition a normal if statement is preferred", whenStmt.position)
-            return listOf(IAstModification.ReplaceNode(whenStmt, ifStmt, parent))
-        }
-
-        if(whenStmt.condition.inferType(program).isBool) {
-            if(whenStmt.choices.all { it.values?.size==1 }) {
-                if (whenStmt.choices.all { it.values!!.single().constValue(program)!!.number in arrayOf(0.0, 1.0) }) {
-                    // it's a when statement on booleans that can just be replaced by an if or if..else.
-                    if (whenStmt.choices.size == 1) {
-                        return if(whenStmt.choices[0].values!![0].constValue(program)!!.number==1.0) {
-                            replaceWithIf(whenStmt.condition, whenStmt.choices[0].statements, null)
-                        } else {
-                            val notCondition = BinaryExpression(whenStmt.condition, "==", NumericLiteral(DataType.UBYTE, 0.0, whenStmt.condition.position), whenStmt.condition.position)
-                            replaceWithIf(notCondition, whenStmt.choices[0].statements, null)
-                        }
-                    } else if (whenStmt.choices.size == 2) {
-                        var trueBlock: AnonymousScope? = null
-                        var elseBlock: AnonymousScope? = null
-                        if(whenStmt.choices[0].values!![0].constValue(program)!!.number==1.0) {
-                            trueBlock = whenStmt.choices[0].statements
-                        } else {
-                            elseBlock = whenStmt.choices[0].statements
-                        }
-                        if(whenStmt.choices[1].values!![0].constValue(program)!!.number==1.0) {
-                            trueBlock = whenStmt.choices[1].statements
-                        } else {
-                            elseBlock = whenStmt.choices[1].statements
-                        }
-                        if(trueBlock!=null && elseBlock!=null) {
-                            return replaceWithIf(whenStmt.condition, trueBlock, elseBlock)
-                        }
-                    }
-                }
-            }
-        }
-        return noModifications
-    }
-
 }

codeOptimizers/src/prog8/optimizer/UnusedCodeRemover.kt

@@ -75,9 +75,7 @@ class UnusedCodeRemover(private val program: Program,
                     if(!block.statements.any { it is Subroutine && it.hasBeenInlined })
                         errors.warn("removing unused block '${block.name}'", block.position)
                 }
-                if(!block.statements.any { it is Subroutine && it.hasBeenInlined }) {
-                    program.removeInternedStringsFromRemovedBlock(block)
-                }
+                program.removeInternedStringsFromRemovedBlock(block)
                 return listOf(IAstModification.Remove(block, parent as IStatementContainer))
             }
         }

compiler/build.gradle

@@ -1,10 +1,9 @@
 plugins {
     id 'java'
     id 'application'
-    id 'org.jetbrains.kotlin.jvm'
+    id "org.jetbrains.kotlin.jvm"
     id 'com.github.johnrengelman.shadow' version '7.1.2'
-    id 'io.kotest' version '0.3.9'
-    id 'com.peterabeles.gversion' version '1.10.2'
+    id "io.kotest" version "0.3.9"
 }
 
 java {
@@ -25,6 +24,8 @@ compileTestKotlin {
     }
 }
 
+def prog8version = rootProject.file('compiler/res/version.txt').text.trim()
+
 dependencies {
     implementation project(':codeCore')
     implementation project(':codeOptimizers')
@@ -33,14 +34,14 @@ dependencies {
     implementation project(':codeGenIntermediate')
     implementation project(':codeGenExperimental')
     implementation project(':virtualmachine')
-    implementation "org.antlr:antlr4-runtime:4.13.0"
+    implementation "org.antlr:antlr4-runtime:4.12.0"
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
     // implementation "org.jetbrains.kotlin:kotlin-reflect"
     implementation 'org.jetbrains.kotlinx:kotlinx-cli:0.3.5'
-    implementation "com.michael-bull.kotlin-result:kotlin-result-jvm:1.1.18"
+    implementation "com.michael-bull.kotlin-result:kotlin-result-jvm:1.1.16"
 
     testImplementation project(':intermediate')
-    testImplementation 'io.kotest:kotest-runner-junit5-jvm:5.6.2'
+    testImplementation 'io.kotest:kotest-runner-junit5-jvm:5.5.5'
 }
 
 configurations.all {
@@ -81,7 +82,7 @@ application {
 
 shadowJar {
     archiveBaseName = 'prog8compiler'
-    archiveVersion = version
+    archiveVersion = prog8version
     // minimize()
 }
 
@@ -99,16 +100,4 @@ test {
     }
 }
 
-gversion {
-    srcDir       = "src/"           // path is relative to the sub-project by default
-    classPackage = "prog8.buildversion"
-    className    = "BuildVersion"
-    language     = "kotlin"
-}
-
-
 build.finalizedBy installDist, installShadowDist
-
-compileKotlin.dependsOn createVersionFile    // , failDirtyNotSnapshot
-compileJava.dependsOn createVersionFile
-

compiler/res/prog8lib/atari/syslib.p8

@@ -2,41 +2,44 @@
 ; Including memory registers, I/O registers, Basic and Kernal subroutines.
 
 atari {
-    %option no_symbol_prefixing
 
         &uword  NMI_VEC         = $FFFA     ; 6502 nmi vector, determined by the kernal if banked in
         &uword  RESET_VEC       = $FFFC     ; 6502 reset vector, determined by the kernal if banked in
         &uword  IRQ_VEC         = $FFFE     ; 6502 interrupt vector, determined by the kernal if banked in
 
+; ---- kernal routines ----
+; TODO
+
+
+asmsub  init_system()  {
+    ; Initializes the machine to a sane starting state.
+    ; Called automatically by the loader program logic.
+    ; TODO
+    %asm {{
+        sei
+        cld
+        clc
+        ; TODO reset screen mode etc etc
+        clv
+        cli
+        rts
+    }}
 }
 
+asmsub  init_system_phase2()  {
+    %asm {{
+        rts     ; no phase 2 steps on the Atari
+    }}
+}
+
+}
+
+
 sys {
     ; ------- lowlevel system routines --------
 
-    %option no_symbol_prefixing
-
     const ubyte target = 8         ;  compilation target specifier.  64 = C64, 128 = C128,  16 = CommanderX16, 8 = atari800XL
 
-    asmsub  init_system()  {
-        ; Initializes the machine to a sane starting state.
-        ; Called automatically by the loader program logic.
-        ; TODO
-        %asm {{
-            sei
-            cld
-            clc
-            ; TODO reset screen mode etc etc
-            clv
-            cli
-            rts
-        }}
-    }
-
-    asmsub  init_system_phase2()  {
-        %asm {{
-            rts     ; no phase 2 steps on the Atari
-        }}
-    }
 
     asmsub  reset_system()  {
         ; Soft-reset the system back to initial power-on Basic prompt.
@@ -185,19 +188,6 @@ _longcopy
         }}
     }
 
-    inline asmsub irqsafe_set_irqd() {
-        %asm {{
-        php
-        sei
-        }}
-    }
-
-    inline asmsub irqsafe_clear_irqd() {
-        %asm {{
-        plp
-        }}
-    }
-
     inline asmsub exit(ubyte returnvalue @A) {
         ; -- immediately exit the program with a return code in the A register
         ;    TODO
@@ -218,7 +208,6 @@ _longcopy
 }
 
 cx16 {
-    %option no_symbol_prefixing
 
     ; the sixteen virtual 16-bit registers that the CX16 has defined in the zeropage
     ; they are simulated on the Atari as well but their location in memory is different
@@ -324,31 +313,4 @@ cx16 {
     &byte r13sH = $1b1b
     &byte r14sH = $1b1d
     &byte r15sH = $1b1f
-
-    asmsub save_virtual_registers() clobbers(A,Y) {
-        %asm {{
-            ldy  #31
-    -       lda  cx16.r0,y
-            sta  _cx16_vreg_storage,y
-            dey
-            bpl  -
-            rts
-
-    _cx16_vreg_storage
-            .word 0,0,0,0,0,0,0,0
-            .word 0,0,0,0,0,0,0,0
-        }}
-    }
-
-    asmsub restore_virtual_registers() clobbers(A,Y) {
-        %asm {{
-            ldy  #31
-    -       lda  save_virtual_registers._cx16_vreg_storage,y
-            sta  cx16.r0,y
-            dey
-            bpl  -
-            rts
-        }}
-    }
-
 }

compiler/res/prog8lib/atari/textio.p8

@@ -6,8 +6,6 @@
 
 txt {
 
-    %option no_symbol_prefixing
-
 const ubyte DEFAULT_WIDTH = 40
 const ubyte DEFAULT_HEIGHT = 24
 
@@ -72,7 +70,7 @@ sub uppercase() {
     ; TODO
 }
 
-asmsub  scroll_left  (bool alsocolors @ Pc) clobbers(A, Y)  {
+asmsub  scroll_left  (ubyte alsocolors @ Pc) clobbers(A, Y)  {
 	; ---- scroll the whole screen 1 character to the left
 	;      contents of the rightmost column are unchanged, you should clear/refill this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -83,7 +81,7 @@ asmsub  scroll_left  (bool alsocolors @ Pc) clobbers(A, Y)  {
         }}
 }
 
-asmsub  scroll_right  (bool alsocolors @ Pc) clobbers(A)  {
+asmsub  scroll_right  (ubyte alsocolors @ Pc) clobbers(A)  {
 	; ---- scroll the whole screen 1 character to the right
 	;      contents of the leftmost column are unchanged, you should clear/refill this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -93,7 +91,7 @@ asmsub  scroll_right  (bool alsocolors @ Pc) clobbers(A)  {
         }}
 }
 
-asmsub  scroll_up  (bool alsocolors @ Pc) clobbers(A)  {
+asmsub  scroll_up  (ubyte alsocolors @ Pc) clobbers(A)  {
 	; ---- scroll the whole screen 1 character up
 	;      contents of the bottom row are unchanged, you should refill/clear this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -103,7 +101,7 @@ asmsub  scroll_up  (bool alsocolors @ Pc) clobbers(A)  {
         }}
 }
 
-asmsub  scroll_down  (bool alsocolors @ Pc) clobbers(A)  {
+asmsub  scroll_down  (ubyte alsocolors @ Pc) clobbers(A)  {
 	; ---- scroll the whole screen 1 character down
 	;      contents of the top row are unchanged, you should refill/clear this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -120,6 +118,7 @@ romsub $F2Fd = waitkey()
 asmsub chrout(ubyte char @ A) {
 	%asm {{
 		sta  _tmp_outchar+1
+		pha
 		txa
 		pha
 		tya
@@ -131,6 +130,7 @@ _tmp_outchar
 		tay
 		pla
 		tax
+		pla
 		rts
 	}}
 }
@@ -210,7 +210,7 @@ asmsub  print_b  (byte value @ A) clobbers(A,Y)  {
 	}}
 }
 
-asmsub  print_ubhex  (ubyte value @ A, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_ubhex  (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the ubyte in A in hex form (if Carry is set, a radix prefix '$' is printed as well)
 	%asm {{
 		stx  P8ZP_SCRATCH_REG
@@ -228,7 +228,7 @@ asmsub  print_ubhex  (ubyte value @ A, bool prefix @ Pc) clobbers(A,Y)  {
 	}}
 }
 
-asmsub  print_ubbin  (ubyte value @ A, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_ubbin  (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the ubyte in A in binary form (if Carry is set, a radix prefix '%' is printed as well)
 	%asm {{
 		stx  P8ZP_SCRATCH_REG
@@ -249,7 +249,7 @@ asmsub  print_ubbin  (ubyte value @ A, bool prefix @ Pc) clobbers(A,Y)  {
 	}}
 }
 
-asmsub  print_uwbin  (uword value @ AY, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_uwbin  (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the uword in A/Y in binary form (if Carry is set, a radix prefix '%' is printed as well)
 	%asm {{
 		pha
@@ -261,7 +261,7 @@ asmsub  print_uwbin  (uword value @ AY, bool prefix @ Pc) clobbers(A,Y)  {
 	}}
 }
 
-asmsub  print_uwhex  (uword value @ AY, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_uwhex  (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the uword in A/Y in hexadecimal form (4 digits)
 	;      (if Carry is set, a radix prefix '$' is printed as well)
 	%asm {{

compiler/res/prog8lib/c128/graphics.p8

@@ -6,8 +6,6 @@
 ; TODO c128 actually implement the graphics routines. Ideally a way to 'borrow' the code form the C64 version without just copy-pasting that here?
 
 graphics {
-    %option no_symbol_prefixing
-
     const uword WIDTH = 320
     const ubyte HEIGHT = 200
 

compiler/res/prog8lib/c128/syslib.p8

@@ -1,9 +1,7 @@
 ; Prog8 definitions for the Commodore-128
 ; Including memory registers, I/O registers, Basic and Kernal subroutines.
 
-cbm {
-    ; Commodore (CBM) common variables, vectors and kernal routines
-    %option no_symbol_prefixing
+c64 {
 
         &ubyte  TIME_HI         = $a0       ; software jiffy clock, hi byte
         &ubyte  TIME_MID        = $a1       ;  .. mid byte
@@ -49,100 +47,6 @@ cbm {
         const  uword  Screen    = $0400     ; to have this as an array[40*25] the compiler would have to support array size > 255
         const  uword  Colors    = $d800     ; to have this as an array[40*25] the compiler would have to support array size > 255
 
-; ---- kernal routines, these are the same as on the Commodore-64 (hence the same block name) ----
-
-; STROUT --> use txt.print
-; CLEARSCR -> use txt.clear_screen
-; HOMECRSR -> use txt.home or txt.plot
-
-romsub $FA65 = IRQDFRT() clobbers(A,X,Y)                        ; default IRQ routine
-romsub $FF33 = IRQDFEND() clobbers(A,X,Y)                       ; default IRQ end/cleanup
-
-; TODO c128 a bunch of kernal routines are missing here that are specific to the c128
-
-romsub $FF81 = CINT() clobbers(A,X,Y)                           ; (alias: SCINIT) initialize screen editor and video chip
-romsub $FF84 = IOINIT() clobbers(A, X)                          ; initialize I/O devices (CIA, SID, IRQ)
-romsub $FF87 = RAMTAS() clobbers(A,X,Y)                         ; initialize RAM, tape buffer, screen
-romsub $FF8A = RESTOR() clobbers(A,X,Y)                         ; restore default I/O vectors
-romsub $FF8D = VECTOR(uword userptr @ XY, bool dir @ Pc) clobbers(A,Y)     ; read/set I/O vector table
-romsub $FF90 = SETMSG(ubyte value @ A)                          ; set Kernal message control flag
-romsub $FF93 = SECOND(ubyte address @ A) clobbers(A)            ; (alias: LSTNSA) send secondary address after LISTEN
-romsub $FF96 = TKSA(ubyte address @ A) clobbers(A)              ; (alias: TALKSA) send secondary address after TALK
-romsub $FF99 = MEMTOP(uword address @ XY, bool dir @ Pc) -> uword @ XY     ; read/set top of memory  pointer
-romsub $FF9C = MEMBOT(uword address @ XY, bool dir @ Pc) -> uword @ XY     ; read/set bottom of memory  pointer
-romsub $FF9F = SCNKEY() clobbers(A,X,Y)                         ; scan the keyboard
-romsub $FFA2 = SETTMO(ubyte timeout @ A)                        ; set time-out flag for IEEE bus
-romsub $FFA5 = ACPTR() -> ubyte @ A                             ; (alias: IECIN) input byte from serial bus
-romsub $FFA8 = CIOUT(ubyte databyte @ A)                        ; (alias: IECOUT) output byte to serial bus
-romsub $FFAB = UNTLK() clobbers(A)                              ; command serial bus device to UNTALK
-romsub $FFAE = UNLSN() clobbers(A)                              ; command serial bus device to UNLISTEN
-romsub $FFB1 = LISTEN(ubyte device @ A) clobbers(A)             ; command serial bus device to LISTEN
-romsub $FFB4 = TALK(ubyte device @ A) clobbers(A)               ; command serial bus device to TALK
-romsub $FFB7 = READST() -> ubyte @ A                            ; read I/O status word
-romsub $FFBA = SETLFS(ubyte logical @ A, ubyte device @ X, ubyte secondary @ Y)   ; set logical file parameters
-romsub $FFBD = SETNAM(ubyte namelen @ A, str filename @ XY)     ; set filename parameters
-romsub $FFC0 = OPEN() clobbers(X,Y) -> bool @Pc, ubyte @A      ; (via 794 ($31A)) open a logical file
-romsub $FFC3 = CLOSE(ubyte logical @ A) clobbers(A,X,Y)         ; (via 796 ($31C)) close a logical file
-romsub $FFC6 = CHKIN(ubyte logical @ X) clobbers(A,X) -> bool @Pc    ; (via 798 ($31E)) define an input channel
-romsub $FFC9 = CHKOUT(ubyte logical @ X) clobbers(A,X)          ; (via 800 ($320)) define an output channel
-romsub $FFCC = CLRCHN() clobbers(A,X)                           ; (via 802 ($322)) restore default devices
-romsub $FFCF = CHRIN() clobbers(X, Y) -> ubyte @ A   ; (via 804 ($324)) input a character (for keyboard, read a whole line from the screen) A=byte read.
-romsub $FFD2 = CHROUT(ubyte char @ A)                           ; (via 806 ($326)) output a character
-romsub $FFD5 = LOAD(ubyte verify @ A, uword address @ XY) -> bool @Pc, ubyte @ A, uword @ XY     ; (via 816 ($330)) load from device
-romsub $FFD8 = SAVE(ubyte zp_startaddr @ A, uword endaddr @ XY) -> bool @ Pc, ubyte @ A          ; (via 818 ($332)) save to a device
-romsub $FFDB = SETTIM(ubyte low @ A, ubyte middle @ X, ubyte high @ Y)      ; set the software clock
-romsub $FFDE = RDTIM() -> ubyte @ A, ubyte @ X, ubyte @ Y       ; read the software clock (A=lo,X=mid,Y=high)
-romsub $FFE1 = STOP() clobbers(X) -> bool @ Pz, ubyte @ A      ; (via 808 ($328)) check the STOP key (and some others in A)
-romsub $FFE4 = GETIN() clobbers(X,Y) -> bool @Pc, ubyte @ A    ; (via 810 ($32A)) get a character
-romsub $FFE7 = CLALL() clobbers(A,X)                            ; (via 812 ($32C)) close all files
-romsub $FFEA = UDTIM() clobbers(A,X)                            ; update the software clock
-romsub $FFED = SCREEN() -> ubyte @ X, ubyte @ Y                 ; read number of screen rows and columns
-romsub $FFF0 = PLOT(ubyte col @ Y, ubyte row @ X, bool dir @ Pc) -> ubyte @ X, ubyte @ Y       ; read/set position of cursor on screen.  Use txt.plot for a 'safe' wrapper that preserves X.
-romsub $FFF3 = IOBASE() -> uword @ XY                           ; read base address of I/O devices
-
-; ---- end of C64 compatible ROM kernal routines ----
-
-; ---- utilities -----
-
-asmsub STOP2() -> ubyte @A  {
-    ; -- check if STOP key was pressed, returns true if so.  More convenient to use than STOP() because that only sets the carry status flag.
-    %asm {{
-        txa
-        pha
-        jsr  cbm.STOP
-        beq  +
-        pla
-        tax
-        lda  #0
-        rts
-+       pla
-        tax
-        lda  #1
-        rts
-    }}
-}
-
-asmsub RDTIM16() -> uword @AY {
-    ; --  like RDTIM() but only returning the lower 16 bits in AY for convenience
-    %asm {{
-        stx  P8ZP_SCRATCH_REG
-        jsr  cbm.RDTIM
-        pha
-        txa
-        tay
-        pla
-        ldx  P8ZP_SCRATCH_REG
-        rts
-    }}
-}
-
-
-}
-
-c64 {
-        ; C64 I/O registers (VIC, SID, CIA)
-    %option no_symbol_prefixing
-
         ; the default locations of the 8 sprite pointers (store address of sprite / 64)
         &ubyte  SPRPTR0         = 2040
         &ubyte  SPRPTR1         = 2041
@@ -292,93 +196,95 @@ c64 {
 
     ; ---- end of SID registers ----
 
-}
+; ---- kernal routines, these are the same as on the Commodore-64 (hence the same block name) ----
 
-c128 {
-; ---- C128 specific registers ----
-    %option no_symbol_prefixing
+; STROUT --> use txt.print
+; CLEARSCR -> use txt.clear_screen
+; HOMECRSR -> use txt.home or txt.plot
 
-    &ubyte  VM1     = $0A2C         ; shadow for VUC $d018 in text mode
-    &ubyte  VM2     = $0A2D         ; shadow for VIC $d018 in bitmap screen mode
-    &ubyte  VM3     = $0A2E         ; starting page for VDC screen mem
-    &ubyte  VM4     = $0A2F         ; starting page for VDC attribute mem
+romsub $FA65 = IRQDFRT() clobbers(A,X,Y)                        ; default IRQ routine
+romsub $FF33 = IRQDFEND() clobbers(A,X,Y)                       ; default IRQ end/cleanup
 
+; TODO c128 a bunch of kernal routines are missing here that are specific to the c128
 
-; ---- C128 specific system utility routines: ----
+romsub $FF81 = CINT() clobbers(A,X,Y)                           ; (alias: SCINIT) initialize screen editor and video chip
+romsub $FF84 = IOINIT() clobbers(A, X)                          ; initialize I/O devices (CIA, SID, IRQ)
+romsub $FF87 = RAMTAS() clobbers(A,X,Y)                         ; initialize RAM, tape buffer, screen
+romsub $FF8A = RESTOR() clobbers(A,X,Y)                         ; restore default I/O vectors
+romsub $FF8D = VECTOR(uword userptr @ XY, ubyte dir @ Pc) clobbers(A,Y)     ; read/set I/O vector table
+romsub $FF90 = SETMSG(ubyte value @ A)                          ; set Kernal message control flag
+romsub $FF93 = SECOND(ubyte address @ A) clobbers(A)            ; (alias: LSTNSA) send secondary address after LISTEN
+romsub $FF96 = TKSA(ubyte address @ A) clobbers(A)              ; (alias: TALKSA) send secondary address after TALK
+romsub $FF99 = MEMTOP(uword address @ XY, ubyte dir @ Pc) -> uword @ XY     ; read/set top of memory  pointer
+romsub $FF9C = MEMBOT(uword address @ XY, ubyte dir @ Pc) -> uword @ XY     ; read/set bottom of memory  pointer
+romsub $FF9F = SCNKEY() clobbers(A,X,Y)                         ; scan the keyboard
+romsub $FFA2 = SETTMO(ubyte timeout @ A)                        ; set time-out flag for IEEE bus
+romsub $FFA5 = ACPTR() -> ubyte @ A                             ; (alias: IECIN) input byte from serial bus
+romsub $FFA8 = CIOUT(ubyte databyte @ A)                        ; (alias: IECOUT) output byte to serial bus
+romsub $FFAB = UNTLK() clobbers(A)                              ; command serial bus device to UNTALK
+romsub $FFAE = UNLSN() clobbers(A)                              ; command serial bus device to UNLISTEN
+romsub $FFB1 = LISTEN(ubyte device @ A) clobbers(A)             ; command serial bus device to LISTEN
+romsub $FFB4 = TALK(ubyte device @ A) clobbers(A)               ; command serial bus device to TALK
+romsub $FFB7 = READST() -> ubyte @ A                            ; read I/O status word
+romsub $FFBA = SETLFS(ubyte logical @ A, ubyte device @ X, ubyte secondary @ Y)   ; set logical file parameters
+romsub $FFBD = SETNAM(ubyte namelen @ A, str filename @ XY)     ; set filename parameters
+romsub $FFC0 = OPEN() clobbers(X,Y) -> ubyte @Pc, ubyte @A      ; (via 794 ($31A)) open a logical file
+romsub $FFC3 = CLOSE(ubyte logical @ A) clobbers(A,X,Y)         ; (via 796 ($31C)) close a logical file
+romsub $FFC6 = CHKIN(ubyte logical @ X) clobbers(A,X) -> ubyte @Pc    ; (via 798 ($31E)) define an input channel
+romsub $FFC9 = CHKOUT(ubyte logical @ X) clobbers(A,X)          ; (via 800 ($320)) define an output channel
+romsub $FFCC = CLRCHN() clobbers(A,X)                           ; (via 802 ($322)) restore default devices
+romsub $FFCF = CHRIN() clobbers(X, Y) -> ubyte @ A   ; (via 804 ($324)) input a character (for keyboard, read a whole line from the screen) A=byte read.
+romsub $FFD2 = CHROUT(ubyte char @ A)                           ; (via 806 ($326)) output a character
+romsub $FFD5 = LOAD(ubyte verify @ A, uword address @ XY) -> ubyte @Pc, ubyte @ A, uword @ XY     ; (via 816 ($330)) load from device
+romsub $FFD8 = SAVE(ubyte zp_startaddr @ A, uword endaddr @ XY) -> ubyte @ Pc, ubyte @ A          ; (via 818 ($332)) save to a device
+romsub $FFDB = SETTIM(ubyte low @ A, ubyte middle @ X, ubyte high @ Y)      ; set the software clock
+romsub $FFDE = RDTIM() -> ubyte @ A, ubyte @ X, ubyte @ Y       ; read the software clock (A=lo,X=mid,Y=high)
+romsub $FFE1 = STOP() clobbers(X) -> ubyte @ Pz, ubyte @ A      ; (via 808 ($328)) check the STOP key (and some others in A)
+romsub $FFE4 = GETIN() clobbers(X,Y) -> ubyte @Pc, ubyte @ A    ; (via 810 ($32A)) get a character
+romsub $FFE7 = CLALL() clobbers(A,X)                            ; (via 812 ($32C)) close all files
+romsub $FFEA = UDTIM() clobbers(A,X)                            ; update the software clock
+romsub $FFED = SCREEN() -> ubyte @ X, ubyte @ Y                 ; read number of screen rows and columns
+romsub $FFF0 = PLOT(ubyte col @ Y, ubyte row @ X, ubyte dir @ Pc) -> ubyte @ X, ubyte @ Y       ; read/set position of cursor on screen.  Use txt.plot for a 'safe' wrapper that preserves X.
+romsub $FFF3 = IOBASE() -> uword @ XY                           ; read base address of I/O devices
 
-asmsub  disable_basic() clobbers(A) {
+; ---- end of C64 compatible ROM kernal routines ----
+
+; ---- utilities -----
+
+asmsub STOP2() -> ubyte @A  {
+    ; -- check if STOP key was pressed, returns true if so.  More convenient to use than STOP() because that only sets the carry status flag.
     %asm {{
-        lda $0a04   ; disable BASIC shadow registers
-        and #$fe
-        sta $0a04
-
-        lda #$01    ; disable BASIC IRQ service routine
-        sta $12fd
-
-        lda #$ff    ; disable screen editor IRQ setup
-        sta $d8
-
-        lda #$b7    ; skip programmable function key check
-        sta $033c
-
-        lda #$0e    ; bank out BASIC ROM
-        sta $ff00
+        txa
+        pha
+        jsr  c64.STOP
+        beq  +
+        pla
+        tax
+        lda  #0
+        rts
++       pla
+        tax
+        lda  #1
         rts
     }}
 }
 
-; ---- end of C128 specific system utility routines ----
-
-}
-
-sys {
-    ; ------- lowlevel system routines --------
-    %option no_symbol_prefixing
-
-    const ubyte target = 128         ;  compilation target specifier.  64 = C64, 128 = C128,  16 = CommanderX16.
-
-asmsub  init_system()  {
-    ; Initializes the machine to a sane starting state.
-    ; Called automatically by the loader program logic.
-    ; This means that the BASIC, KERNAL and CHARGEN ROMs are banked in,
-    ; the VIC, SID and CIA chips are reset, screen is cleared, and the default IRQ is set.
-    ; Also a different color scheme is chosen to identify ourselves a little.
-    ; Uppercase charset is activated, and all three registers set to 0, status flags cleared.
+asmsub RDTIM16() -> uword @AY {
+    ; --  like RDTIM() but only returning the lower 16 bits in AY for convenience
     %asm {{
-        sei
-        cld
-        lda  #0
-        sta  $ff00      ; select default bank 15
-        jsr  cbm.IOINIT
-        jsr  cbm.RESTOR
-        jsr  cbm.CINT
-        lda  #6
-        sta  c64.EXTCOL
-        lda  #7
-        sta  cbm.COLOR
-        lda  #0
-        sta  c64.BGCOL0
-        jsr  disable_runstop_and_charsetswitch
-        clc
-        clv
-        cli
+        stx  P8ZP_SCRATCH_REG
+        jsr  c64.RDTIM
+        pha
+        txa
+        tay
+        pla
+        ldx  P8ZP_SCRATCH_REG
         rts
     }}
 }
 
-asmsub  init_system_phase2()  {
-    %asm {{
-        rts     ; no phase 2 steps on the C128
-    }}
-}
-
-asmsub  cleanup_at_exit() {
-    ; executed when the main subroutine does rts
-    %asm {{
-        jmp  sys.enable_runstop_and_charsetswitch
-    }}
-}
 
+; ---- system utility routines that are essentially the same as on the C64: -----
 asmsub  disable_runstop_and_charsetswitch() clobbers(A) {
     %asm {{
         lda  #$80
@@ -399,7 +305,7 @@ asmsub  enable_runstop_and_charsetswitch() clobbers(A) {
     }}
 }
 
-asmsub  set_irq(uword handler @AY, bool useKernal @Pc) clobbers(A)  {
+asmsub  set_irq(uword handler @AY, ubyte useKernal @Pc) clobbers(A)  {
 	%asm {{
 	        sta  _modified+1
 	        sty  _modified+2
@@ -408,9 +314,9 @@ asmsub  set_irq(uword handler @AY, bool useKernal @Pc) clobbers(A)  {
 	        sta  _use_kernal
 		sei
 		lda  #<_irq_handler
-		sta  cbm.CINV
+		sta  c64.CINV
 		lda  #>_irq_handler
-		sta  cbm.CINV+1
+		sta  c64.CINV+1
 		cli
 		rts
 _irq_handler    jsr  _irq_handler_init
@@ -428,7 +334,7 @@ _modified	jsr  $ffff                      ; modified
 		tax
 		pla
 		rti
-+		jmp  cbm.IRQDFRT		; continue with normal kernal irq routine
++		jmp  c64.IRQDFRT		; continue with normal kernal irq routine
 
 _use_kernal     .byte  0
 
@@ -480,10 +386,10 @@ IRQ_SCRATCH_ZPWORD2	.word  0
 asmsub  restore_irq() clobbers(A) {
 	%asm {{
 		sei
-		lda  #<cbm.IRQDFRT
-		sta  cbm.CINV
-		lda  #>cbm.IRQDFRT
-		sta  cbm.CINV+1
+		lda  #<c64.IRQDFRT
+		sta  c64.CINV
+		lda  #>c64.IRQDFRT
+		sta  c64.CINV+1
 		lda  #0
 		sta  c64.IREQMASK	; disable raster irq
 		lda  #%10000001
@@ -493,7 +399,7 @@ asmsub  restore_irq() clobbers(A) {
 	}}
 }
 
-asmsub  set_rasterirq(uword handler @AY, uword rasterpos @R0, bool useKernal @Pc) clobbers(A) {
+asmsub  set_rasterirq(uword handler @AY, uword rasterpos @R0, ubyte useKernal @Pc) clobbers(A) {
 	%asm {{
 	        sta  _modified+1
 	        sty  _modified+2
@@ -505,9 +411,9 @@ asmsub  set_rasterirq(uword handler @AY, uword rasterpos @R0, bool useKernal @Pc
 		sei
 		jsr  _setup_raster_irq
 		lda  #<_raster_irq_handler
-		sta  cbm.CINV
+		sta  c64.CINV
 		lda  #>_raster_irq_handler
-		sta  cbm.CINV+1
+		sta  c64.CINV+1
 		cli
 		rts
 
@@ -515,8 +421,8 @@ _raster_irq_handler
 		jsr  set_irq._irq_handler_init
 _modified	jsr  $ffff              ; modified
 		jsr  set_irq._irq_handler_end
-        lda  #$ff
-        sta  c64.VICIRQ			; acknowledge raster irq
+                lda  #$ff
+                sta  c64.VICIRQ			; acknowledge raster irq
 		lda  set_irq._use_kernal
 		bne  +
 		; end irq processing - don't use kernal's irq handling
@@ -526,7 +432,7 @@ _modified	jsr  $ffff              ; modified
 		tax
 		pla
 		rti
-+		jmp  cbm.IRQDFRT                ; continue with kernal irq routine
++		jmp  c64.IRQDFRT                ; continue with kernal irq routine
 
 _setup_raster_irq
 		pha
@@ -550,13 +456,99 @@ _setup_raster_irq
 	}}
 }
 
+}
+
+c128 {
+; ---- C128 specific registers ----
+
+    &ubyte  VM1     = $0A2C         ; shadow for VUC $d018 in text mode
+    &ubyte  VM2     = $0A2D         ; shadow for VIC $d018 in bitmap screen mode
+    &ubyte  VM3     = $0A2E         ; starting page for VDC screen mem
+    &ubyte  VM4     = $0A2F         ; starting page for VDC attribute mem
+
+
+; ---- C128 specific system utility routines: ----
+
+asmsub  init_system()  {
+    ; Initializes the machine to a sane starting state.
+    ; Called automatically by the loader program logic.
+    ; This means that the BASIC, KERNAL and CHARGEN ROMs are banked in,
+    ; the VIC, SID and CIA chips are reset, screen is cleared, and the default IRQ is set.
+    ; Also a different color scheme is chosen to identify ourselves a little.
+    ; Uppercase charset is activated, and all three registers set to 0, status flags cleared.
+    %asm {{
+        sei
+        cld
+        lda  #0
+        sta  $ff00      ; select default bank 15
+        jsr  c64.IOINIT
+        jsr  c64.RESTOR
+        jsr  c64.CINT
+        lda  #6
+        sta  c64.EXTCOL
+        lda  #7
+        sta  c64.COLOR
+        lda  #0
+        sta  c64.BGCOL0
+        jsr  c64.disable_runstop_and_charsetswitch
+        clc
+        clv
+        cli
+        rts
+    }}
+}
+
+asmsub  init_system_phase2()  {
+    %asm {{
+        rts     ; no phase 2 steps on the C128
+    }}
+}
+
+asmsub  cleanup_at_exit() {
+    ; executed when the main subroutine does rts
+    %asm {{
+        jmp  c64.enable_runstop_and_charsetswitch
+    }}
+}
+
+asmsub  disable_basic() clobbers(A) {
+    %asm {{
+        lda $0a04   ; disable BASIC shadow registers
+        and #$fe
+        sta $0a04
+
+        lda #$01    ; disable BASIC IRQ service routine
+        sta $12fd
+
+        lda #$ff    ; disable screen editor IRQ setup
+        sta $d8
+
+        lda #$b7    ; skip programmable function key check
+        sta $033c
+
+        lda #$0e    ; bank out BASIC ROM
+        sta $ff00
+        rts
+    }}
+}
+
+; ---- end of C128 specific system utility routines ----
+
+}
+
+sys {
+    ; ------- lowlevel system routines --------
+
+    const ubyte target = 128         ;  compilation target specifier.  64 = C64, 128 = C128,  16 = CommanderX16.
+
+
     asmsub  reset_system()  {
         ; Soft-reset the system back to initial power-on Basic prompt.
         %asm {{
             sei
             lda  #0
             sta  $ff00      ; default bank 15
-            jmp  (cbm.RESET_VEC)
+            jmp  (c64.RESET_VEC)
         }}
     }
 
@@ -574,9 +566,9 @@ _loop       lda  P8ZP_SCRATCH_W1
             ldx  P8ZP_SCRATCH_B1
             rts
 
-+           lda  cbm.TIME_LO
++           lda  c64.TIME_LO
             sta  P8ZP_SCRATCH_B1
--           lda  cbm.TIME_LO
+-           lda  c64.TIME_LO
             cmp  P8ZP_SCRATCH_B1
             beq  -
 
@@ -733,26 +725,13 @@ _longcopy
         }}
     }
 
-    inline asmsub irqsafe_set_irqd() {
-        %asm {{
-        php
-        sei
-        }}
-    }
-
-    inline asmsub irqsafe_clear_irqd() {
-        %asm {{
-        plp
-        }}
-    }
-
     inline asmsub exit(ubyte returnvalue @A) {
         ; -- immediately exit the program with a return code in the A register
         %asm {{
             lda  #0
             sta  $ff00          ; default bank 15
-            jsr  cbm.CLRCHN		; reset i/o channels
-            jsr  sys.enable_runstop_and_charsetswitch
+            jsr  c64.CLRCHN		; reset i/o channels
+            jsr  c64.enable_runstop_and_charsetswitch
             ldx  prog8_lib.orig_stackpointer
             txs
             rts		; return to original caller
@@ -769,7 +748,6 @@ _longcopy
 }
 
 cx16 {
-    %option no_symbol_prefixing
 
     ; the sixteen virtual 16-bit registers that the CX16 has defined in the zeropage
     ; they are simulated on the C128 as well but their location in memory is different
@@ -879,30 +857,4 @@ cx16 {
     &byte r13sH = $1b1b
     &byte r14sH = $1b1d
     &byte r15sH = $1b1f
-
-    asmsub save_virtual_registers() clobbers(A,Y) {
-        %asm {{
-            ldy  #31
-    -       lda  cx16.r0,y
-            sta  _cx16_vreg_storage,y
-            dey
-            bpl  -
-            rts
-
-    _cx16_vreg_storage
-            .word 0,0,0,0,0,0,0,0
-            .word 0,0,0,0,0,0,0,0
-        }}
-    }
-
-    asmsub restore_virtual_registers() clobbers(A,Y) {
-        %asm {{
-            ldy  #31
-    -       lda  save_virtual_registers._cx16_vreg_storage,y
-            sta  cx16.r0,y
-            dey
-            bpl  -
-            rts
-        }}
-    }
 }

compiler/res/prog8lib/c128/textio.p8

@@ -5,7 +5,6 @@
 
 
 txt {
-    %option no_symbol_prefixing
 
 const ubyte DEFAULT_WIDTH = 40
 const ubyte DEFAULT_HEIGHT = 25
@@ -31,10 +30,10 @@ asmsub column(ubyte col @A) clobbers(A, X, Y) {
     ; ---- set the cursor on the given column (starting with 0) on the current line
     %asm {{
         sec
-        jsr  cbm.PLOT
+        jsr  c64.PLOT
         tay
         clc
-        jmp  cbm.PLOT
+        jmp  c64.PLOT
     }}
 }
 
@@ -58,10 +57,10 @@ asmsub  clear_screenchars (ubyte char @ A) clobbers(Y)  {
 	;      (assumes screen matrix is at the default address)
 	%asm {{
 		ldy  #250
--		sta  cbm.Screen+250*0-1,y
-		sta  cbm.Screen+250*1-1,y
-		sta  cbm.Screen+250*2-1,y
-		sta  cbm.Screen+250*3-1,y
+-		sta  c64.Screen+250*0-1,y
+		sta  c64.Screen+250*1-1,y
+		sta  c64.Screen+250*2-1,y
+		sta  c64.Screen+250*3-1,y
 		dey
 		bne  -
 		rts
@@ -73,10 +72,10 @@ asmsub  clear_screencolors (ubyte color @ A) clobbers(Y)  {
 	;      (assumes color matrix is at the default address)
 	%asm {{
 		ldy  #250
--		sta  cbm.Colors+250*0-1,y
-		sta  cbm.Colors+250*1-1,y
-		sta  cbm.Colors+250*2-1,y
-		sta  cbm.Colors+250*3-1,y
+-		sta  c64.Colors+250*0-1,y
+		sta  c64.Colors+250*1-1,y
+		sta  c64.Colors+250*2-1,y
+		sta  c64.Colors+250*3-1,y
 		dey
 		bne  -
 		rts
@@ -84,7 +83,7 @@ asmsub  clear_screencolors (ubyte color @ A) clobbers(Y)  {
 }
 
 sub color (ubyte txtcol) {
-    cbm.COLOR = txtcol
+    c64.COLOR = txtcol
 }
 
 sub lowercase() {
@@ -97,7 +96,7 @@ sub uppercase() {
     c128.VM1 &= ~2
 }
 
-asmsub  scroll_left  (bool alsocolors @ Pc) clobbers(A, Y)  {
+asmsub  scroll_left  (ubyte alsocolors @ Pc) clobbers(A, Y)  {
 	; ---- scroll the whole screen 1 character to the left
 	;      contents of the rightmost column are unchanged, you should clear/refill this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -111,10 +110,10 @@ asmsub  scroll_left  (bool alsocolors @ Pc) clobbers(A, Y)  {
 		ldy  #38
 -
         .for row=0, row<=24, row+=1
-            lda  cbm.Screen + 40*row + 1,x
-            sta  cbm.Screen + 40*row + 0,x
-            lda  cbm.Colors + 40*row + 1,x
-            sta  cbm.Colors + 40*row + 0,x
+            lda  c64.Screen + 40*row + 1,x
+            sta  c64.Screen + 40*row + 0,x
+            lda  c64.Colors + 40*row + 1,x
+            sta  c64.Colors + 40*row + 0,x
         .next
 		inx
 		dey
@@ -126,8 +125,8 @@ _scroll_screen  ; scroll only the screen memory
 		ldy  #38
 -
         .for row=0, row<=24, row+=1
-            lda  cbm.Screen + 40*row + 1,x
-            sta  cbm.Screen + 40*row + 0,x
+            lda  c64.Screen + 40*row + 1,x
+            sta  c64.Screen + 40*row + 0,x
         .next
 		inx
 		dey
@@ -138,7 +137,7 @@ _scroll_screen  ; scroll only the screen memory
 	}}
 }
 
-asmsub  scroll_right  (bool alsocolors @ Pc) clobbers(A)  {
+asmsub  scroll_right  (ubyte alsocolors @ Pc) clobbers(A)  {
 	; ---- scroll the whole screen 1 character to the right
 	;      contents of the leftmost column are unchanged, you should clear/refill this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -150,10 +149,10 @@ asmsub  scroll_right  (bool alsocolors @ Pc) clobbers(A)  {
 		ldx  #38
 -
         .for row=0, row<=24, row+=1
-            lda  cbm.Screen + 40*row + 0,x
-            sta  cbm.Screen + 40*row + 1,x
-            lda  cbm.Colors + 40*row + 0,x
-            sta  cbm.Colors + 40*row + 1,x
+            lda  c64.Screen + 40*row + 0,x
+            sta  c64.Screen + 40*row + 1,x
+            lda  c64.Colors + 40*row + 0,x
+            sta  c64.Colors + 40*row + 1,x
         .next
 		dex
 		bpl  -
@@ -163,8 +162,8 @@ _scroll_screen  ; scroll only the screen memory
 		ldx  #38
 -
         .for row=0, row<=24, row+=1
-            lda  cbm.Screen + 40*row + 0,x
-            sta  cbm.Screen + 40*row + 1,x
+            lda  c64.Screen + 40*row + 0,x
+            sta  c64.Screen + 40*row + 1,x
         .next
 		dex
 		bpl  -
@@ -174,7 +173,7 @@ _scroll_screen  ; scroll only the screen memory
 	}}
 }
 
-asmsub  scroll_up  (bool alsocolors @ Pc) clobbers(A)  {
+asmsub  scroll_up  (ubyte alsocolors @ Pc) clobbers(A)  {
 	; ---- scroll the whole screen 1 character up
 	;      contents of the bottom row are unchanged, you should refill/clear this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -186,10 +185,10 @@ asmsub  scroll_up  (bool alsocolors @ Pc) clobbers(A)  {
 		ldx #39
 -
         .for row=1, row<=24, row+=1
-            lda  cbm.Screen + 40*row,x
-            sta  cbm.Screen + 40*(row-1),x
-            lda  cbm.Colors + 40*row,x
-            sta  cbm.Colors + 40*(row-1),x
+            lda  c64.Screen + 40*row,x
+            sta  c64.Screen + 40*(row-1),x
+            lda  c64.Colors + 40*row,x
+            sta  c64.Colors + 40*(row-1),x
         .next
 		dex
 		bpl  -
@@ -199,8 +198,8 @@ _scroll_screen  ; scroll only the screen memory
 		ldx #39
 -
         .for row=1, row<=24, row+=1
-            lda  cbm.Screen + 40*row,x
-            sta  cbm.Screen + 40*(row-1),x
+            lda  c64.Screen + 40*row,x
+            sta  c64.Screen + 40*(row-1),x
         .next
 		dex
 		bpl  -
@@ -210,7 +209,7 @@ _scroll_screen  ; scroll only the screen memory
 	}}
 }
 
-asmsub  scroll_down  (bool alsocolors @ Pc) clobbers(A)  {
+asmsub  scroll_down  (ubyte alsocolors @ Pc) clobbers(A)  {
 	; ---- scroll the whole screen 1 character down
 	;      contents of the top row are unchanged, you should refill/clear this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -222,10 +221,10 @@ asmsub  scroll_down  (bool alsocolors @ Pc) clobbers(A)  {
 		ldx #39
 -
         .for row=23, row>=0, row-=1
-            lda  cbm.Colors + 40*row,x
-            sta  cbm.Colors + 40*(row+1),x
-            lda  cbm.Screen + 40*row,x
-            sta  cbm.Screen + 40*(row+1),x
+            lda  c64.Colors + 40*row,x
+            sta  c64.Colors + 40*(row+1),x
+            lda  c64.Screen + 40*row,x
+            sta  c64.Screen + 40*(row+1),x
         .next
 		dex
 		bpl  -
@@ -235,8 +234,8 @@ _scroll_screen  ; scroll only the screen memory
 		ldx #39
 -
         .for row=23, row>=0, row-=1
-            lda  cbm.Screen + 40*row,x
-            sta  cbm.Screen + 40*(row+1),x
+            lda  c64.Screen + 40*row,x
+            sta  c64.Screen + 40*(row+1),x
         .next
 		dex
 		bpl  -
@@ -246,20 +245,20 @@ _scroll_screen  ; scroll only the screen memory
 	}}
 }
 
-romsub $FFD2 = chrout(ubyte char @ A)    ; for consistency. You can also use cbm.CHROUT directly ofcourse.
+romsub $FFD2 = chrout(ubyte char @ A)    ; for consistency. You can also use c64.CHROUT directly ofcourse.
 
 asmsub  print (str text @ AY) clobbers(A,Y)  {
 	; ---- print null terminated string from A/Y
 	; note: the compiler contains an optimization that will replace
 	;       a call to this subroutine with a string argument of just one char,
-	;       by just one call to cbm.CHROUT of that single char.
+	;       by just one call to c64.CHROUT of that single char.
 	%asm {{
 		sta  P8ZP_SCRATCH_B1
 		sty  P8ZP_SCRATCH_REG
 		ldy  #0
 -		lda  (P8ZP_SCRATCH_B1),y
 		beq  +
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		iny
 		bne  -
 +		rts
@@ -273,11 +272,11 @@ asmsub  print_ub0  (ubyte value @ A) clobbers(A,Y)  {
 		jsr  conv.ubyte2decimal
 		pha
 		tya
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		pla
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		txa
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		ldx  P8ZP_SCRATCH_REG
 		rts
 	}}
@@ -293,16 +292,16 @@ _print_byte_digits
 		cpy  #'0'
 		beq  +
 		tya
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		pla
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		jmp  _ones
 +       pla
         cmp  #'0'
         beq  _ones
-        jsr  cbm.CHROUT
+        jsr  c64.CHROUT
 _ones   txa
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		ldx  P8ZP_SCRATCH_REG
 		rts
 	}}
@@ -316,45 +315,45 @@ asmsub  print_b  (byte value @ A) clobbers(A,Y)  {
 		cmp  #0
 		bpl  +
 		lda  #'-'
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 +		pla
 		jsr  conv.byte2decimal
 		jmp  print_ub._print_byte_digits
 	}}
 }
 
-asmsub  print_ubhex  (ubyte value @ A, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_ubhex  (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the ubyte in A in hex form (if Carry is set, a radix prefix '$' is printed as well)
 	%asm {{
 		stx  P8ZP_SCRATCH_REG
 		bcc  +
 		pha
 		lda  #'$'
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		pla
 +		jsr  conv.ubyte2hex
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		tya
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		ldx  P8ZP_SCRATCH_REG
 		rts
 	}}
 }
 
-asmsub  print_ubbin  (ubyte value @ A, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_ubbin  (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the ubyte in A in binary form (if Carry is set, a radix prefix '%' is printed as well)
 	%asm {{
 		stx  P8ZP_SCRATCH_REG
 		sta  P8ZP_SCRATCH_B1
 		bcc  +
 		lda  #'%'
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 +		ldy  #8
 -		lda  #'0'
 		asl  P8ZP_SCRATCH_B1
 		bcc  +
 		lda  #'1'
-+		jsr  cbm.CHROUT
++		jsr  c64.CHROUT
 		dey
 		bne  -
 		ldx  P8ZP_SCRATCH_REG
@@ -362,7 +361,7 @@ asmsub  print_ubbin  (ubyte value @ A, bool prefix @ Pc) clobbers(A,Y)  {
 	}}
 }
 
-asmsub  print_uwbin  (uword value @ AY, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_uwbin  (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the uword in A/Y in binary form (if Carry is set, a radix prefix '%' is printed as well)
 	%asm {{
 		pha
@@ -374,7 +373,7 @@ asmsub  print_uwbin  (uword value @ AY, bool prefix @ Pc) clobbers(A,Y)  {
 	}}
 }
 
-asmsub  print_uwhex  (uword value @ AY, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_uwhex  (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the uword in A/Y in hexadecimal form (4 digits)
 	;      (if Carry is set, a radix prefix '$' is printed as well)
 	%asm {{
@@ -395,7 +394,7 @@ asmsub  print_uw0  (uword value @ AY) clobbers(A,Y)  {
 		ldy  #0
 -		lda  conv.uword2decimal.decTenThousands,y
         beq  +
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		iny
 		bne  -
 +		ldx  P8ZP_SCRATCH_REG
@@ -418,14 +417,14 @@ asmsub  print_uw  (uword value @ AY) clobbers(A,Y)  {
 		bne  -
 
 _gotdigit
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		iny
 		lda  conv.uword2decimal.decTenThousands,y
 		bne  _gotdigit
 		rts
 _allzero
         lda  #'0'
-        jmp  cbm.CHROUT
+        jmp  c64.CHROUT
 	}}
 }
 
@@ -436,7 +435,7 @@ asmsub  print_w  (word value @ AY) clobbers(A,Y)  {
 		bpl  +
 		pha
 		lda  #'-'
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		tya
 		eor  #255
 		tay
@@ -458,7 +457,7 @@ asmsub  input_chars  (uword buffer @ AY) clobbers(A) -> ubyte @ Y  {
 		sta  P8ZP_SCRATCH_W1
 		sty  P8ZP_SCRATCH_W1+1
 		ldy  #0				; char counter = 0
--		jsr  cbm.CHRIN
+-		jsr  c64.CHRIN
 		cmp  #$0d			; return (ascii 13) pressed?
 		beq  +				; yes, end.
 		sta  (P8ZP_SCRATCH_W1),y	; else store char in buffer
@@ -589,7 +588,7 @@ asmsub  plot  (ubyte col @ Y, ubyte row @ A) clobbers(A) {
 		stx  P8ZP_SCRATCH_REG
 		tax
 		clc
-		jsr  cbm.PLOT
+		jsr  c64.PLOT
 		ldx  P8ZP_SCRATCH_REG
 		rts
 	}}
@@ -598,7 +597,7 @@ asmsub  plot  (ubyte col @ Y, ubyte row @ A) clobbers(A) {
 asmsub width() clobbers(X,Y) -> ubyte @A {
     ; -- returns the text screen width (number of columns)
     %asm {{
-        jsr  cbm.SCREEN
+        jsr  c64.SCREEN
         txa
         rts
     }}
@@ -607,7 +606,7 @@ asmsub width() clobbers(X,Y) -> ubyte @A {
 asmsub height() clobbers(X, Y) -> ubyte @A {
     ; -- returns the text screen height (number of rows)
     %asm {{
-        jsr  cbm.SCREEN
+        jsr  c64.SCREEN
         tya
         rts
     }}

compiler/res/prog8lib/c64/floats.p8

@@ -5,7 +5,6 @@
 
 floats {
 	; ---- this block contains C-64 floating point related functions ----
-    %option no_symbol_prefixing
 
         const float  PI     = 3.141592653589793
         const float  TWOPI  = 6.283185307179586

compiler/res/prog8lib/c64/floats_funcs.asm

@@ -144,19 +144,3 @@ func_all_f_stack	.proc
 		jsr  a_times_5
 		jmp  prog8_lib.func_all_b_stack
 		.pend
-
-func_abs_f_into_FAC1    .proc
-        stx  P8ZP_SCRATCH_REG
-        jsr  MOVFM
-        jsr  ABS
-        ldx  P8ZP_SCRATCH_REG
-        rts
-	.pend
-
-func_sqrt_into_FAC1     .proc
-        stx  P8ZP_SCRATCH_REG
-        jsr  MOVFM
-        jsr  SQR
-        ldx  P8ZP_SCRATCH_REG
-        rts
-	.pend

compiler/res/prog8lib/c64/graphics.p8

@@ -5,8 +5,6 @@
 ; assumes bitmap screen memory is $2000-$3fff
 
 graphics {
-    %option no_symbol_prefixing
-
     const uword BITMAP_ADDRESS = $2000
     const uword WIDTH = 320
     const ubyte HEIGHT = 200

compiler/res/prog8lib/c64/syslib.p8

@@ -1,13 +1,7 @@
 ; Prog8 definitions for the Commodore-64
 ; Including memory registers, I/O registers, Basic and Kernal subroutines.
 
-
-cbm {
-
-    ; Commodore (CBM) common variables, vectors and kernal routines
-
-    %option no_symbol_prefixing
-
+c64 {
         &ubyte  TIME_HI         = $a0       ; software jiffy clock, hi byte
         &ubyte  TIME_MID        = $a1       ;  .. mid byte
         &ubyte  TIME_LO         = $a2       ;    .. lo byte. Updated by IRQ every 1/60 sec
@@ -56,93 +50,6 @@ cbm {
         const  uword  Screen    = $0400     ; to have this as an array[40*25] the compiler would have to support array size > 255
         const  uword  Colors    = $d800     ; to have this as an array[40*25] the compiler would have to support array size > 255
 
-
-; ---- CBM ROM kernal routines (C64 addresses) ----
-
-romsub $AB1E = STROUT(uword strptr @ AY) clobbers(A, X, Y)      ; print null-terminated string (use txt.print instead)
-romsub $E544 = CLEARSCR() clobbers(A,X,Y)                       ; clear the screen
-romsub $E566 = HOMECRSR() clobbers(A,X,Y)                       ; cursor to top left of screen
-romsub $EA31 = IRQDFRT() clobbers(A,X,Y)                        ; default IRQ routine
-romsub $EA81 = IRQDFEND() clobbers(A,X,Y)                       ; default IRQ end/cleanup
-romsub $FF81 = CINT() clobbers(A,X,Y)                           ; (alias: SCINIT) initialize screen editor and video chip
-romsub $FF84 = IOINIT() clobbers(A, X)                          ; initialize I/O devices (CIA, SID, IRQ)
-romsub $FF87 = RAMTAS() clobbers(A,X,Y)                         ; initialize RAM, tape buffer, screen
-romsub $FF8A = RESTOR() clobbers(A,X,Y)                         ; restore default I/O vectors
-romsub $FF8D = VECTOR(uword userptr @ XY, bool dir @ Pc) clobbers(A,Y)     ; read/set I/O vector table
-romsub $FF90 = SETMSG(ubyte value @ A)                          ; set Kernal message control flag
-romsub $FF93 = SECOND(ubyte address @ A) clobbers(A)            ; (alias: LSTNSA) send secondary address after LISTEN
-romsub $FF96 = TKSA(ubyte address @ A) clobbers(A)              ; (alias: TALKSA) send secondary address after TALK
-romsub $FF99 = MEMTOP(uword address @ XY, bool dir @ Pc) -> uword @ XY     ; read/set top of memory  pointer
-romsub $FF9C = MEMBOT(uword address @ XY, bool dir @ Pc) -> uword @ XY     ; read/set bottom of memory  pointer
-romsub $FF9F = SCNKEY() clobbers(A,X,Y)                         ; scan the keyboard
-romsub $FFA2 = SETTMO(ubyte timeout @ A)                        ; set time-out flag for IEEE bus
-romsub $FFA5 = ACPTR() -> ubyte @ A                             ; (alias: IECIN) input byte from serial bus
-romsub $FFA8 = CIOUT(ubyte databyte @ A)                        ; (alias: IECOUT) output byte to serial bus
-romsub $FFAB = UNTLK() clobbers(A)                              ; command serial bus device to UNTALK
-romsub $FFAE = UNLSN() clobbers(A)                              ; command serial bus device to UNLISTEN
-romsub $FFB1 = LISTEN(ubyte device @ A) clobbers(A)             ; command serial bus device to LISTEN
-romsub $FFB4 = TALK(ubyte device @ A) clobbers(A)               ; command serial bus device to TALK
-romsub $FFB7 = READST() -> ubyte @ A                            ; read I/O status word
-romsub $FFBA = SETLFS(ubyte logical @ A, ubyte device @ X, ubyte secondary @ Y)   ; set logical file parameters
-romsub $FFBD = SETNAM(ubyte namelen @ A, str filename @ XY)     ; set filename parameters
-romsub $FFC0 = OPEN() clobbers(X,Y) -> bool @Pc, ubyte @A      ; (via 794 ($31A)) open a logical file
-romsub $FFC3 = CLOSE(ubyte logical @ A) clobbers(A,X,Y)         ; (via 796 ($31C)) close a logical file
-romsub $FFC6 = CHKIN(ubyte logical @ X) clobbers(A,X) -> bool @Pc    ; (via 798 ($31E)) define an input channel
-romsub $FFC9 = CHKOUT(ubyte logical @ X) clobbers(A,X)          ; (via 800 ($320)) define an output channel
-romsub $FFCC = CLRCHN() clobbers(A,X)                           ; (via 802 ($322)) restore default devices
-romsub $FFCF = CHRIN() clobbers(X, Y) -> ubyte @ A   ; (via 804 ($324)) input a character (for keyboard, read a whole line from the screen) A=byte read.
-romsub $FFD2 = CHROUT(ubyte char @ A)                           ; (via 806 ($326)) output a character
-romsub $FFD5 = LOAD(ubyte verify @ A, uword address @ XY) -> bool @Pc, ubyte @ A, uword @ XY     ; (via 816 ($330)) load from device
-romsub $FFD8 = SAVE(ubyte zp_startaddr @ A, uword endaddr @ XY) -> bool @ Pc, ubyte @ A          ; (via 818 ($332)) save to a device
-romsub $FFDB = SETTIM(ubyte low @ A, ubyte middle @ X, ubyte high @ Y)      ; set the software clock
-romsub $FFDE = RDTIM() -> ubyte @ A, ubyte @ X, ubyte @ Y       ; read the software clock (A=lo,X=mid,Y=high)
-romsub $FFE1 = STOP() clobbers(X) -> bool @ Pz, ubyte @ A      ; (via 808 ($328)) check the STOP key (and some others in A)
-romsub $FFE4 = GETIN() clobbers(X,Y) -> bool @Pc, ubyte @ A    ; (via 810 ($32A)) get a character
-romsub $FFE7 = CLALL() clobbers(A,X)                            ; (via 812 ($32C)) close all files
-romsub $FFEA = UDTIM() clobbers(A,X)                            ; update the software clock
-romsub $FFED = SCREEN() -> ubyte @ X, ubyte @ Y                 ; read number of screen rows and columns
-romsub $FFF0 = PLOT(ubyte col @ Y, ubyte row @ X, bool dir @ Pc) -> ubyte @ X, ubyte @ Y       ; read/set position of cursor on screen.  Use txt.plot for a 'safe' wrapper that preserves X.
-romsub $FFF3 = IOBASE() -> uword @ XY                           ; read base address of I/O devices
-
-asmsub STOP2() -> ubyte @A  {
-    ; -- check if STOP key was pressed, returns true if so.  More convenient to use than STOP() because that only sets the carry status flag.
-    %asm {{
-        txa
-        pha
-        jsr  cbm.STOP
-        beq  +
-        pla
-        tax
-        lda  #0
-        rts
-+       pla
-        tax
-        lda  #1
-        rts
-    }}
-}
-
-asmsub RDTIM16() -> uword @AY {
-    ; --  like RDTIM() but only returning the lower 16 bits in AY for convenience
-    %asm {{
-        stx  P8ZP_SCRATCH_REG
-        jsr  cbm.RDTIM
-        pha
-        txa
-        tay
-        pla
-        ldx  P8ZP_SCRATCH_REG
-        rts
-    }}
-}
-
-}
-
-c64 {
-        ; C64 I/O registers (VIC, SID, CIA)
-
-    %option no_symbol_prefixing
-
         ; the default locations of the 8 sprite pointers (store address of sprite / 64)
         &ubyte  SPRPTR0         = 2040
         &ubyte  SPRPTR1         = 2041
@@ -292,15 +199,93 @@ c64 {
 
 ; ---- end of SID registers ----
 
+
+; ---- C64 ROM kernal routines ----
+
+romsub $AB1E = STROUT(uword strptr @ AY) clobbers(A, X, Y)      ; print null-terminated string (use txt.print instead)
+romsub $E544 = CLEARSCR() clobbers(A,X,Y)                       ; clear the screen
+romsub $E566 = HOMECRSR() clobbers(A,X,Y)                       ; cursor to top left of screen
+romsub $EA31 = IRQDFRT() clobbers(A,X,Y)                        ; default IRQ routine
+romsub $EA81 = IRQDFEND() clobbers(A,X,Y)                       ; default IRQ end/cleanup
+romsub $FF81 = CINT() clobbers(A,X,Y)                           ; (alias: SCINIT) initialize screen editor and video chip
+romsub $FF84 = IOINIT() clobbers(A, X)                          ; initialize I/O devices (CIA, SID, IRQ)
+romsub $FF87 = RAMTAS() clobbers(A,X,Y)                         ; initialize RAM, tape buffer, screen
+romsub $FF8A = RESTOR() clobbers(A,X,Y)                         ; restore default I/O vectors
+romsub $FF8D = VECTOR(uword userptr @ XY, ubyte dir @ Pc) clobbers(A,Y)     ; read/set I/O vector table
+romsub $FF90 = SETMSG(ubyte value @ A)                          ; set Kernal message control flag
+romsub $FF93 = SECOND(ubyte address @ A) clobbers(A)            ; (alias: LSTNSA) send secondary address after LISTEN
+romsub $FF96 = TKSA(ubyte address @ A) clobbers(A)              ; (alias: TALKSA) send secondary address after TALK
+romsub $FF99 = MEMTOP(uword address @ XY, ubyte dir @ Pc) -> uword @ XY     ; read/set top of memory  pointer
+romsub $FF9C = MEMBOT(uword address @ XY, ubyte dir @ Pc) -> uword @ XY     ; read/set bottom of memory  pointer
+romsub $FF9F = SCNKEY() clobbers(A,X,Y)                         ; scan the keyboard
+romsub $FFA2 = SETTMO(ubyte timeout @ A)                        ; set time-out flag for IEEE bus
+romsub $FFA5 = ACPTR() -> ubyte @ A                             ; (alias: IECIN) input byte from serial bus
+romsub $FFA8 = CIOUT(ubyte databyte @ A)                        ; (alias: IECOUT) output byte to serial bus
+romsub $FFAB = UNTLK() clobbers(A)                              ; command serial bus device to UNTALK
+romsub $FFAE = UNLSN() clobbers(A)                              ; command serial bus device to UNLISTEN
+romsub $FFB1 = LISTEN(ubyte device @ A) clobbers(A)             ; command serial bus device to LISTEN
+romsub $FFB4 = TALK(ubyte device @ A) clobbers(A)               ; command serial bus device to TALK
+romsub $FFB7 = READST() -> ubyte @ A                            ; read I/O status word
+romsub $FFBA = SETLFS(ubyte logical @ A, ubyte device @ X, ubyte secondary @ Y)   ; set logical file parameters
+romsub $FFBD = SETNAM(ubyte namelen @ A, str filename @ XY)     ; set filename parameters
+romsub $FFC0 = OPEN() clobbers(X,Y) -> ubyte @Pc, ubyte @A      ; (via 794 ($31A)) open a logical file
+romsub $FFC3 = CLOSE(ubyte logical @ A) clobbers(A,X,Y)         ; (via 796 ($31C)) close a logical file
+romsub $FFC6 = CHKIN(ubyte logical @ X) clobbers(A,X) -> ubyte @Pc    ; (via 798 ($31E)) define an input channel
+romsub $FFC9 = CHKOUT(ubyte logical @ X) clobbers(A,X)          ; (via 800 ($320)) define an output channel
+romsub $FFCC = CLRCHN() clobbers(A,X)                           ; (via 802 ($322)) restore default devices
+romsub $FFCF = CHRIN() clobbers(X, Y) -> ubyte @ A   ; (via 804 ($324)) input a character (for keyboard, read a whole line from the screen) A=byte read.
+romsub $FFD2 = CHROUT(ubyte char @ A)                           ; (via 806 ($326)) output a character
+romsub $FFD5 = LOAD(ubyte verify @ A, uword address @ XY) -> ubyte @Pc, ubyte @ A, uword @ XY     ; (via 816 ($330)) load from device
+romsub $FFD8 = SAVE(ubyte zp_startaddr @ A, uword endaddr @ XY) -> ubyte @ Pc, ubyte @ A          ; (via 818 ($332)) save to a device
+romsub $FFDB = SETTIM(ubyte low @ A, ubyte middle @ X, ubyte high @ Y)      ; set the software clock
+romsub $FFDE = RDTIM() -> ubyte @ A, ubyte @ X, ubyte @ Y       ; read the software clock (A=lo,X=mid,Y=high)
+romsub $FFE1 = STOP() clobbers(X) -> ubyte @ Pz, ubyte @ A      ; (via 808 ($328)) check the STOP key (and some others in A)
+romsub $FFE4 = GETIN() clobbers(X,Y) -> ubyte @Pc, ubyte @ A    ; (via 810 ($32A)) get a character
+romsub $FFE7 = CLALL() clobbers(A,X)                            ; (via 812 ($32C)) close all files
+romsub $FFEA = UDTIM() clobbers(A,X)                            ; update the software clock
+romsub $FFED = SCREEN() -> ubyte @ X, ubyte @ Y                 ; read number of screen rows and columns
+romsub $FFF0 = PLOT(ubyte col @ Y, ubyte row @ X, ubyte dir @ Pc) -> ubyte @ X, ubyte @ Y       ; read/set position of cursor on screen.  Use txt.plot for a 'safe' wrapper that preserves X.
+romsub $FFF3 = IOBASE() -> uword @ XY                           ; read base address of I/O devices
+
+; ---- end of C64 ROM kernal routines ----
+
+; ---- utilities -----
+
+asmsub STOP2() -> ubyte @A  {
+    ; -- check if STOP key was pressed, returns true if so.  More convenient to use than STOP() because that only sets the carry status flag.
+    %asm {{
+        txa
+        pha
+        jsr  c64.STOP
+        beq  +
+        pla
+        tax
+        lda  #0
+        rts
++       pla
+        tax
+        lda  #1
+        rts
+    }}
 }
 
-sys {
-    ; ------- lowlevel system routines --------
+asmsub RDTIM16() -> uword @AY {
+    ; --  like RDTIM() but only returning the lower 16 bits in AY for convenience
+    %asm {{
+        stx  P8ZP_SCRATCH_REG
+        jsr  c64.RDTIM
+        pha
+        txa
+        tay
+        pla
+        ldx  P8ZP_SCRATCH_REG
+        rts
+    }}
+}
 
-    %option no_symbol_prefixing
 
-    const ubyte target = 64         ;  compilation target specifier.  64 = C64, 128 = C128, 16 = CommanderX16.
 
+; ---- C64 specific system utility routines: ----
 
 asmsub  init_system()  {
     ; Initializes the machine to a sane starting state.
@@ -316,13 +301,13 @@ asmsub  init_system()  {
         sta  $00
         lda  #%00100111
         sta  $01
-        jsr  cbm.IOINIT
-        jsr  cbm.RESTOR
-        jsr  cbm.CINT
+        jsr  c64.IOINIT
+        jsr  c64.RESTOR
+        jsr  c64.CINT
         lda  #6
         sta  c64.EXTCOL
         lda  #7
-        sta  cbm.COLOR
+        sta  c64.COLOR
         lda  #0
         sta  c64.BGCOL0
         jsr  disable_runstop_and_charsetswitch
@@ -342,7 +327,7 @@ asmsub  init_system_phase2()  {
 asmsub  cleanup_at_exit() {
     ; executed when the main subroutine does rts
     %asm {{
-        jmp  sys.enable_runstop_and_charsetswitch
+        jmp  c64.enable_runstop_and_charsetswitch
     }}
 }
 
@@ -366,7 +351,7 @@ asmsub  enable_runstop_and_charsetswitch() clobbers(A) {
     }}
 }
 
-asmsub  set_irq(uword handler @AY, bool useKernal @Pc) clobbers(A)  {
+asmsub  set_irq(uword handler @AY, ubyte useKernal @Pc) clobbers(A)  {
 	%asm {{
 	        sta  _modified+1
 	        sty  _modified+2
@@ -375,9 +360,9 @@ asmsub  set_irq(uword handler @AY, bool useKernal @Pc) clobbers(A)  {
 	        sta  _use_kernal
 		sei
 		lda  #<_irq_handler
-		sta  cbm.CINV
+		sta  c64.CINV
 		lda  #>_irq_handler
-		sta  cbm.CINV+1
+		sta  c64.CINV+1
 		cli
 		rts
 _irq_handler    jsr  _irq_handler_init
@@ -395,7 +380,7 @@ _modified	jsr  $ffff                      ; modified
 		tax
 		pla
 		rti
-+		jmp  cbm.IRQDFRT		; continue with normal kernal irq routine
++		jmp  c64.IRQDFRT		; continue with normal kernal irq routine
 
 _use_kernal     .byte  0
 
@@ -447,10 +432,10 @@ IRQ_SCRATCH_ZPWORD2	.word  0
 asmsub  restore_irq() clobbers(A) {
 	%asm {{
 		sei
-		lda  #<cbm.IRQDFRT
-		sta  cbm.CINV
-		lda  #>cbm.IRQDFRT
-		sta  cbm.CINV+1
+		lda  #<c64.IRQDFRT
+		sta  c64.CINV
+		lda  #>c64.IRQDFRT
+		sta  c64.CINV+1
 		lda  #0
 		sta  c64.IREQMASK	; disable raster irq
 		lda  #%10000001
@@ -460,7 +445,7 @@ asmsub  restore_irq() clobbers(A) {
 	}}
 }
 
-asmsub  set_rasterirq(uword handler @AY, uword rasterpos @R0, bool useKernal @Pc) clobbers(A) {
+asmsub  set_rasterirq(uword handler @AY, uword rasterpos @R0, ubyte useKernal @Pc) clobbers(A) {
 	%asm {{
 	        sta  _modified+1
 	        sty  _modified+2
@@ -472,9 +457,9 @@ asmsub  set_rasterirq(uword handler @AY, uword rasterpos @R0, bool useKernal @Pc
 		sei
 		jsr  _setup_raster_irq
 		lda  #<_raster_irq_handler
-		sta  cbm.CINV
+		sta  c64.CINV
 		lda  #>_raster_irq_handler
-		sta  cbm.CINV+1
+		sta  c64.CINV+1
 		cli
 		rts
 
@@ -482,8 +467,8 @@ _raster_irq_handler
 		jsr  set_irq._irq_handler_init
 _modified	jsr  $ffff              ; modified
 		jsr  set_irq._irq_handler_end
-        lda  #$ff
-        sta  c64.VICIRQ			; acknowledge raster irq
+                lda  #$ff
+                sta  c64.VICIRQ			; acknowledge raster irq
 		lda  set_irq._use_kernal
 		bne  +
 		; end irq processing - don't use kernal's irq handling
@@ -493,7 +478,7 @@ _modified	jsr  $ffff              ; modified
 		tax
 		pla
 		rti
-+		jmp  cbm.IRQDFRT                ; continue with kernal irq routine
++		jmp  c64.IRQDFRT                ; continue with kernal irq routine
 
 _setup_raster_irq
 		pha
@@ -517,14 +502,23 @@ _setup_raster_irq
 	}}
 }
 
+; ---- end of C64 specific system utility routines ----
 
-    asmsub reset_system()  {
+}
+
+sys {
+    ; ------- lowlevel system routines --------
+
+    const ubyte target = 64         ;  compilation target specifier.  64 = C64, 128 = C128, 16 = CommanderX16.
+
+
+    asmsub  reset_system()  {
         ; Soft-reset the system back to initial power-on Basic prompt.
         %asm {{
             sei
             lda  #14
             sta  $01        ; bank the kernal in
-            jmp  (cbm.RESET_VEC)
+            jmp  (c64.RESET_VEC)
         }}
     }
 
@@ -542,9 +536,9 @@ _loop       lda  P8ZP_SCRATCH_W1
             ldx  P8ZP_SCRATCH_B1
             rts
 
-+           lda  cbm.TIME_LO
++           lda  c64.TIME_LO
             sta  P8ZP_SCRATCH_B1
--           lda  cbm.TIME_LO
+-           lda  c64.TIME_LO
             cmp  P8ZP_SCRATCH_B1
             beq  -
 
@@ -701,26 +695,13 @@ _longcopy
         }}
     }
 
-    inline asmsub irqsafe_set_irqd() {
-        %asm {{
-        php
-        sei
-        }}
-    }
-
-    inline asmsub irqsafe_clear_irqd() {
-        %asm {{
-        plp
-        }}
-    }
-
     inline asmsub exit(ubyte returnvalue @A) {
         ; -- immediately exit the program with a return code in the A register
         %asm {{
             lda  #31
             sta  $01        ; bank the kernal in
-            jsr  cbm.CLRCHN		; reset i/o channels
-            jsr  sys.enable_runstop_and_charsetswitch
+            jsr  c64.CLRCHN		; reset i/o channels
+            jsr  c64.enable_runstop_and_charsetswitch
             ldx  prog8_lib.orig_stackpointer
             txs
             rts		; return to original caller
@@ -738,8 +719,6 @@ _longcopy
 
 cx16 {
 
-    %option no_symbol_prefixing
-
     ; the sixteen virtual 16-bit registers that the CX16 has defined in the zeropage
     ; they are simulated on the C64 as well but their location in memory is different
     ; (because there's no room for them in the zeropage)
@@ -847,31 +826,4 @@ cx16 {
     &byte r13sH = $cf1b
     &byte r14sH = $cf1d
     &byte r15sH = $cf1f
-
-    asmsub save_virtual_registers() clobbers(A,Y) {
-        %asm {{
-            ldy  #31
-    -       lda  cx16.r0,y
-            sta  _cx16_vreg_storage,y
-            dey
-            bpl  -
-            rts
-
-    _cx16_vreg_storage
-            .word 0,0,0,0,0,0,0,0
-            .word 0,0,0,0,0,0,0,0
-        }}
-    }
-
-    asmsub restore_virtual_registers() clobbers(A,Y) {
-        %asm {{
-            ldy  #31
-    -       lda  save_virtual_registers._cx16_vreg_storage,y
-            sta  cx16.r0,y
-            dey
-            bpl  -
-            rts
-        }}
-    }
-
 }

compiler/res/prog8lib/c64/textio.p8

@@ -6,8 +6,6 @@
 
 txt {
 
-    %option no_symbol_prefixing
-
 const ubyte DEFAULT_WIDTH = 40
 const ubyte DEFAULT_HEIGHT = 25
 
@@ -32,10 +30,10 @@ asmsub column(ubyte col @A) clobbers(A, X, Y) {
     ; ---- set the cursor on the given column (starting with 0) on the current line
     %asm {{
         sec
-        jsr  cbm.PLOT
+        jsr  c64.PLOT
         tay
         clc
-        jmp  cbm.PLOT
+        jmp  c64.PLOT
     }}
 }
 
@@ -59,10 +57,10 @@ asmsub  clear_screenchars (ubyte char @ A) clobbers(Y)  {
 	;      (assumes screen matrix is at the default address)
 	%asm {{
 		ldy  #250
--		sta  cbm.Screen+250*0-1,y
-		sta  cbm.Screen+250*1-1,y
-		sta  cbm.Screen+250*2-1,y
-		sta  cbm.Screen+250*3-1,y
+-		sta  c64.Screen+250*0-1,y
+		sta  c64.Screen+250*1-1,y
+		sta  c64.Screen+250*2-1,y
+		sta  c64.Screen+250*3-1,y
 		dey
 		bne  -
 		rts
@@ -74,10 +72,10 @@ asmsub  clear_screencolors (ubyte color @ A) clobbers(Y)  {
 	;      (assumes color matrix is at the default address)
 	%asm {{
 		ldy  #250
--		sta  cbm.Colors+250*0-1,y
-		sta  cbm.Colors+250*1-1,y
-		sta  cbm.Colors+250*2-1,y
-		sta  cbm.Colors+250*3-1,y
+-		sta  c64.Colors+250*0-1,y
+		sta  c64.Colors+250*1-1,y
+		sta  c64.Colors+250*2-1,y
+		sta  c64.Colors+250*3-1,y
 		dey
 		bne  -
 		rts
@@ -85,7 +83,7 @@ asmsub  clear_screencolors (ubyte color @ A) clobbers(Y)  {
 }
 
 sub color (ubyte txtcol) {
-    cbm.COLOR = txtcol
+    c64.COLOR = txtcol
 }
 
 sub lowercase() {
@@ -96,7 +94,7 @@ sub uppercase() {
     c64.VMCSB &= ~2
 }
 
-asmsub  scroll_left  (bool alsocolors @ Pc) clobbers(A, Y)  {
+asmsub  scroll_left  (ubyte alsocolors @ Pc) clobbers(A, Y)  {
 	; ---- scroll the whole screen 1 character to the left
 	;      contents of the rightmost column are unchanged, you should clear/refill this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -110,10 +108,10 @@ asmsub  scroll_left  (bool alsocolors @ Pc) clobbers(A, Y)  {
 		ldy  #38
 -
         .for row=0, row<=24, row+=1
-            lda  cbm.Screen + 40*row + 1,x
-            sta  cbm.Screen + 40*row + 0,x
-            lda  cbm.Colors + 40*row + 1,x
-            sta  cbm.Colors + 40*row + 0,x
+            lda  c64.Screen + 40*row + 1,x
+            sta  c64.Screen + 40*row + 0,x
+            lda  c64.Colors + 40*row + 1,x
+            sta  c64.Colors + 40*row + 0,x
         .next
 		inx
 		dey
@@ -125,8 +123,8 @@ _scroll_screen  ; scroll only the screen memory
 		ldy  #38
 -
         .for row=0, row<=24, row+=1
-            lda  cbm.Screen + 40*row + 1,x
-            sta  cbm.Screen + 40*row + 0,x
+            lda  c64.Screen + 40*row + 1,x
+            sta  c64.Screen + 40*row + 0,x
         .next
 		inx
 		dey
@@ -137,7 +135,7 @@ _scroll_screen  ; scroll only the screen memory
 	}}
 }
 
-asmsub  scroll_right  (bool alsocolors @ Pc) clobbers(A)  {
+asmsub  scroll_right  (ubyte alsocolors @ Pc) clobbers(A)  {
 	; ---- scroll the whole screen 1 character to the right
 	;      contents of the leftmost column are unchanged, you should clear/refill this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -149,10 +147,10 @@ asmsub  scroll_right  (bool alsocolors @ Pc) clobbers(A)  {
 		ldx  #38
 -
         .for row=0, row<=24, row+=1
-            lda  cbm.Screen + 40*row + 0,x
-            sta  cbm.Screen + 40*row + 1,x
-            lda  cbm.Colors + 40*row + 0,x
-            sta  cbm.Colors + 40*row + 1,x
+            lda  c64.Screen + 40*row + 0,x
+            sta  c64.Screen + 40*row + 1,x
+            lda  c64.Colors + 40*row + 0,x
+            sta  c64.Colors + 40*row + 1,x
         .next
 		dex
 		bpl  -
@@ -162,8 +160,8 @@ _scroll_screen  ; scroll only the screen memory
 		ldx  #38
 -
         .for row=0, row<=24, row+=1
-            lda  cbm.Screen + 40*row + 0,x
-            sta  cbm.Screen + 40*row + 1,x
+            lda  c64.Screen + 40*row + 0,x
+            sta  c64.Screen + 40*row + 1,x
         .next
 		dex
 		bpl  -
@@ -173,7 +171,7 @@ _scroll_screen  ; scroll only the screen memory
 	}}
 }
 
-asmsub  scroll_up  (bool alsocolors @ Pc) clobbers(A)  {
+asmsub  scroll_up  (ubyte alsocolors @ Pc) clobbers(A)  {
 	; ---- scroll the whole screen 1 character up
 	;      contents of the bottom row are unchanged, you should refill/clear this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -185,10 +183,10 @@ asmsub  scroll_up  (bool alsocolors @ Pc) clobbers(A)  {
 		ldx #39
 -
         .for row=1, row<=24, row+=1
-            lda  cbm.Screen + 40*row,x
-            sta  cbm.Screen + 40*(row-1),x
-            lda  cbm.Colors + 40*row,x
-            sta  cbm.Colors + 40*(row-1),x
+            lda  c64.Screen + 40*row,x
+            sta  c64.Screen + 40*(row-1),x
+            lda  c64.Colors + 40*row,x
+            sta  c64.Colors + 40*(row-1),x
         .next
 		dex
 		bpl  -
@@ -198,8 +196,8 @@ _scroll_screen  ; scroll only the screen memory
 		ldx #39
 -
         .for row=1, row<=24, row+=1
-            lda  cbm.Screen + 40*row,x
-            sta  cbm.Screen + 40*(row-1),x
+            lda  c64.Screen + 40*row,x
+            sta  c64.Screen + 40*(row-1),x
         .next
 		dex
 		bpl  -
@@ -209,7 +207,7 @@ _scroll_screen  ; scroll only the screen memory
 	}}
 }
 
-asmsub  scroll_down  (bool alsocolors @ Pc) clobbers(A)  {
+asmsub  scroll_down  (ubyte alsocolors @ Pc) clobbers(A)  {
 	; ---- scroll the whole screen 1 character down
 	;      contents of the top row are unchanged, you should refill/clear this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -221,10 +219,10 @@ asmsub  scroll_down  (bool alsocolors @ Pc) clobbers(A)  {
 		ldx #39
 -
         .for row=23, row>=0, row-=1
-            lda  cbm.Colors + 40*row,x
-            sta  cbm.Colors + 40*(row+1),x
-            lda  cbm.Screen + 40*row,x
-            sta  cbm.Screen + 40*(row+1),x
+            lda  c64.Colors + 40*row,x
+            sta  c64.Colors + 40*(row+1),x
+            lda  c64.Screen + 40*row,x
+            sta  c64.Screen + 40*(row+1),x
         .next
 		dex
 		bpl  -
@@ -234,8 +232,8 @@ _scroll_screen  ; scroll only the screen memory
 		ldx #39
 -
         .for row=23, row>=0, row-=1
-            lda  cbm.Screen + 40*row,x
-            sta  cbm.Screen + 40*(row+1),x
+            lda  c64.Screen + 40*row,x
+            sta  c64.Screen + 40*(row+1),x
         .next
 		dex
 		bpl  -
@@ -245,20 +243,20 @@ _scroll_screen  ; scroll only the screen memory
 	}}
 }
 
-romsub $FFD2 = chrout(ubyte char @ A)    ; for consistency. You can also use cbm.CHROUT directly ofcourse.
+romsub $FFD2 = chrout(ubyte char @ A)    ; for consistency. You can also use c64.CHROUT directly ofcourse.
 
 asmsub  print (str text @ AY) clobbers(A,Y)  {
 	; ---- print null terminated string from A/Y
 	; note: the compiler contains an optimization that will replace
 	;       a call to this subroutine with a string argument of just one char,
-	;       by just one call to cbm.CHROUT of that single char.
+	;       by just one call to c64.CHROUT of that single char.
 	%asm {{
 		sta  P8ZP_SCRATCH_B1
 		sty  P8ZP_SCRATCH_REG
 		ldy  #0
 -		lda  (P8ZP_SCRATCH_B1),y
 		beq  +
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		iny
 		bne  -
 +		rts
@@ -272,11 +270,11 @@ asmsub  print_ub0  (ubyte value @ A) clobbers(A,Y)  {
 		jsr  conv.ubyte2decimal
 		pha
 		tya
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		pla
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		txa
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		ldx  P8ZP_SCRATCH_REG
 		rts
 	}}
@@ -292,16 +290,16 @@ _print_byte_digits
 		cpy  #'0'
 		beq  +
 		tya
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		pla
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		jmp  _ones
 +       pla
         cmp  #'0'
         beq  _ones
-        jsr  cbm.CHROUT
+        jsr  c64.CHROUT
 _ones   txa
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		ldx  P8ZP_SCRATCH_REG
 		rts
 	}}
@@ -315,45 +313,45 @@ asmsub  print_b  (byte value @ A) clobbers(A,Y)  {
 		cmp  #0
 		bpl  +
 		lda  #'-'
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 +		pla
 		jsr  conv.byte2decimal
 		jmp  print_ub._print_byte_digits
 	}}
 }
 
-asmsub  print_ubhex  (ubyte value @ A, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_ubhex  (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the ubyte in A in hex form (if Carry is set, a radix prefix '$' is printed as well)
 	%asm {{
 		stx  P8ZP_SCRATCH_REG
 		bcc  +
 		pha
 		lda  #'$'
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		pla
 +		jsr  conv.ubyte2hex
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		tya
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		ldx  P8ZP_SCRATCH_REG
 		rts
 	}}
 }
 
-asmsub  print_ubbin  (ubyte value @ A, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_ubbin  (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the ubyte in A in binary form (if Carry is set, a radix prefix '%' is printed as well)
 	%asm {{
 		stx  P8ZP_SCRATCH_REG
 		sta  P8ZP_SCRATCH_B1
 		bcc  +
 		lda  #'%'
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 +		ldy  #8
 -		lda  #'0'
 		asl  P8ZP_SCRATCH_B1
 		bcc  +
 		lda  #'1'
-+		jsr  cbm.CHROUT
++		jsr  c64.CHROUT
 		dey
 		bne  -
 		ldx  P8ZP_SCRATCH_REG
@@ -361,7 +359,7 @@ asmsub  print_ubbin  (ubyte value @ A, bool prefix @ Pc) clobbers(A,Y)  {
 	}}
 }
 
-asmsub  print_uwbin  (uword value @ AY, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_uwbin  (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the uword in A/Y in binary form (if Carry is set, a radix prefix '%' is printed as well)
 	%asm {{
 		pha
@@ -373,7 +371,7 @@ asmsub  print_uwbin  (uword value @ AY, bool prefix @ Pc) clobbers(A,Y)  {
 	}}
 }
 
-asmsub  print_uwhex  (uword value @ AY, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_uwhex  (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the uword in A/Y in hexadecimal form (4 digits)
 	;      (if Carry is set, a radix prefix '$' is printed as well)
 	%asm {{
@@ -394,7 +392,7 @@ asmsub  print_uw0  (uword value @ AY) clobbers(A,Y)  {
 		ldy  #0
 -		lda  conv.uword2decimal.decTenThousands,y
         beq  +
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		iny
 		bne  -
 +		ldx  P8ZP_SCRATCH_REG
@@ -417,14 +415,14 @@ asmsub  print_uw  (uword value @ AY) clobbers(A,Y)  {
 		bne  -
 
 _gotdigit
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		iny
 		lda  conv.uword2decimal.decTenThousands,y
 		bne  _gotdigit
 		rts
 _allzero
         lda  #'0'
-        jmp  cbm.CHROUT
+        jmp  c64.CHROUT
 	}}
 }
 
@@ -435,7 +433,7 @@ asmsub  print_w  (word value @ AY) clobbers(A,Y)  {
 		bpl  +
 		pha
 		lda  #'-'
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		tya
 		eor  #255
 		tay
@@ -457,7 +455,7 @@ asmsub  input_chars  (uword buffer @ AY) clobbers(A) -> ubyte @ Y  {
 		sta  P8ZP_SCRATCH_W1
 		sty  P8ZP_SCRATCH_W1+1
 		ldy  #0				; char counter = 0
--		jsr  cbm.CHRIN
+-		jsr  c64.CHRIN
 		cmp  #$0d			; return (ascii 13) pressed?
 		beq  +				; yes, end.
 		sta  (P8ZP_SCRATCH_W1),y	; else store char in buffer
@@ -588,7 +586,7 @@ asmsub  plot  (ubyte col @ Y, ubyte row @ A) clobbers(A) {
 		stx  P8ZP_SCRATCH_REG
 		tax
 		clc
-		jsr  cbm.PLOT
+		jsr  c64.PLOT
 		ldx  P8ZP_SCRATCH_REG
 		rts
 	}}
@@ -597,7 +595,7 @@ asmsub  plot  (ubyte col @ Y, ubyte row @ A) clobbers(A) {
 asmsub width() clobbers(X,Y) -> ubyte @A {
     ; -- returns the text screen width (number of columns)
     %asm {{
-        jsr  cbm.SCREEN
+        jsr  c64.SCREEN
         txa
         rts
     }}
@@ -606,7 +604,7 @@ asmsub width() clobbers(X,Y) -> ubyte @A {
 asmsub height() clobbers(X, Y) -> ubyte @A {
     ; -- returns the text screen height (number of rows)
     %asm {{
-        jsr  cbm.SCREEN
+        jsr  c64.SCREEN
         tya
         rts
     }}

compiler/res/prog8lib/conv.p8

@@ -2,8 +2,6 @@
 
 conv {
 
-    %option no_symbol_prefixing
-
 ; ----- number conversions to decimal strings ----
 
     str  @shared string_out = "????????????????"       ; result buffer for the string conversion routines
@@ -508,7 +506,8 @@ asmsub  ubyte2decimal  (ubyte value @A) -> ubyte @Y, ubyte @A, ubyte @X  {
 	; ---- A to decimal string in Y/A/X  (100s in Y, 10s in A, 1s in X)
 	%asm {{
 		ldy  #uword2decimal.ASCII_0_OFFSET
-		jmp  uword2decimal.hex_try200
+		bne  uword2decimal.hex_try200
+		rts
 	}}
 }
 

compiler/res/prog8lib/cx16/cx16diskio.p8

@@ -0,0 +1,234 @@
+; Cx16 specific disk drive I/O routines.
+
+%import diskio
+%import string
+
+cx16diskio {
+
+    ; Same as diskio.load() but with additional bank parameter to select the Ram bank to load into.
+    ; Use kernal LOAD routine to load the given program file in memory.
+    ; This is similar to Basic's  LOAD "filename",drive  /  LOAD "filename",drive,1
+    ; If you don't give an address_override, the location in memory is taken from the 2-byte file header.
+    ; If you specify a custom address_override, the first 2 bytes in the file are ignored
+    ; and the rest is loaded at the given location in memory.
+    ; Returns the end load address+1 if successful or 0 if a load error occurred.
+    ; You can use the load_size() function to calcuate the size of the file that was loaded.
+    sub load(ubyte drivenumber, uword filenameptr, ubyte bank, uword address_override) -> uword {
+        cx16.rambank(bank)
+        return diskio.internal_load_routine(drivenumber, filenameptr, address_override, false)
+    }
+
+    ; Same as diskio.load_raw() but with additional bank parameter to select the Ram bank to load into.
+    ; Use kernal LOAD routine to load the given file in memory.
+    ; INCLUDING the first 2 bytes in the file: no program header is assumed in the file.
+    ; The load address is mandatory. Returns the number of bytes loaded.
+    ; If you load into regular system ram, use cx16.getrambank() for the bank argument,
+    ; or alternatively make sure to reset the correct ram bank yourself after the load!
+    ; Returns the end load address+1 if successful or 0 if a load error occurred.
+    ; You can use the load_size() function to calcuate the size of the file that was loaded.
+    sub load_raw(ubyte drivenumber, uword filenameptr, ubyte bank, uword address_override) -> uword {
+        cx16.rambank(bank)
+        return diskio.internal_load_routine(drivenumber, filenameptr, address_override, true)
+    }
+
+    ; For use directly after a load or load_raw call (don't mess with the ram bank yet):
+    ; Calculates the number of bytes loaded (files > 64Kb ar truncated to 16 bits)
+    sub load_size(ubyte startbank, uword startaddress, uword endaddress) -> uword {
+        return $2000 * (cx16.getrambank() - startbank) + endaddress - startaddress
+    }
+
+    asmsub vload(str name @R0, ubyte drivenumber @Y, ubyte bank @A, uword address @R1) -> ubyte @A {
+        ; -- like the basic command VLOAD "filename",drivenumber,bank,address
+        ;    loads a file into Vera's video memory in the given bank:address, returns success in A
+        ;    the file has to have the usual 2 byte header (which will be skipped)
+        %asm {{
+            clc
+internal_vload:
+            phx
+            pha
+            tya
+            tax
+            bcc +
+            ldy  #%00000010     ; headerless load mode
+            bne  ++
++           ldy  #0             ; normal load mode
++           lda  #1
+            jsr  c64.SETLFS
+            lda  cx16.r0
+            ldy  cx16.r0+1
+            jsr  prog8_lib.strlen
+            tya
+            ldx  cx16.r0
+            ldy  cx16.r0+1
+            jsr  c64.SETNAM
+            pla
+            clc
+            adc  #2
+            ldx  cx16.r1
+            ldy  cx16.r1+1
+            stz  P8ZP_SCRATCH_B1
+            jsr  c64.LOAD
+            bcs  +
+            inc  P8ZP_SCRATCH_B1
+    +       jsr  c64.CLRCHN
+            lda  #1
+            jsr  c64.CLOSE
+            plx
+            lda  P8ZP_SCRATCH_B1
+            rts
+        }}
+    }
+
+    asmsub vload_raw(str name @R0, ubyte drivenumber @Y, ubyte bank @A, uword address @R1) -> ubyte @A {
+        ; -- like the basic command BVLOAD "filename",drivenumber,bank,address
+        ;    loads a file into Vera's video memory in the given bank:address, returns success in A
+        ;    the file is read fully including the first two bytes.
+        %asm {{
+            sec
+            jmp  vload.internal_vload
+        }}
+    }
+
+    ; Replacement function that makes use of fast block read capability of the X16,
+    ; and can wrap over multiple ram banks while reading.
+    ; Use this in place of regular diskio.f_read() on X16.
+    sub f_read(uword bufferpointer, uword num_bytes) -> uword {
+        ; -- read from the currently open file, up to the given number of bytes.
+        ;    returns the actual number of bytes read.  (checks for End-of-file and error conditions)
+        if not diskio.iteration_in_progress or not num_bytes
+            return 0
+
+        diskio.list_blocks = 0     ; we reuse this variable for the total number of bytes read
+
+        ; commander X16 supports fast block-read via macptr() kernal call
+        uword size
+        while num_bytes {
+            size = 255
+            if num_bytes<size
+                size = num_bytes
+            size = cx16.macptr(lsb(size), bufferpointer, false)
+            if_cs
+                goto byte_read_loop     ; macptr block read not supported, do fallback loop
+            diskio.list_blocks += size
+            bufferpointer += size
+            if msb(bufferpointer) == $c0
+                bufferpointer = mkword($a0, lsb(bufferpointer))  ; wrap over bank boundary
+            num_bytes -= size
+            if c64.READST() & $40 {
+                diskio.f_close()       ; end of file, close it
+                break
+            }
+        }
+        return diskio.list_blocks  ; number of bytes read
+
+byte_read_loop:         ; fallback if macptr() isn't supported on the device
+        %asm {{
+            lda  bufferpointer
+            sta  m_in_buffer+1
+            lda  bufferpointer+1
+            sta  m_in_buffer+2
+        }}
+        while num_bytes {
+            if c64.READST() {
+                diskio.f_close()
+                if c64.READST() & $40    ; eof?
+                    return diskio.list_blocks   ; number of bytes read
+                return 0  ; error.
+            }
+            %asm {{
+                jsr  c64.CHRIN
+m_in_buffer     sta  $ffff
+                inc  m_in_buffer+1
+                bne  +
+                inc  m_in_buffer+2
++
+            }}
+            diskio.list_blocks++
+            num_bytes--
+        }
+        return diskio.list_blocks  ; number of bytes read
+    }
+
+    ; replacement function that makes use of fast block read capability of the X16
+    ; use this in place of regular diskio.f_read_all() on X16
+    sub f_read_all(uword bufferpointer) -> uword {
+        ; -- read the full contents of the file, returns number of bytes read.
+        if not diskio.iteration_in_progress
+            return 0
+
+        uword total_read = 0
+        while not c64.READST() {
+            cx16.r0 = cx16diskio.f_read(bufferpointer, 256)
+            total_read += cx16.r0
+            bufferpointer += cx16.r0
+        }
+        return total_read
+    }
+
+
+    sub chdir(ubyte drivenumber, str path) {
+        ; -- change current directory.
+        diskio.list_filename[0] = 'c'
+        diskio.list_filename[1] = 'd'
+        diskio.list_filename[2] = ':'
+        void string.copy(path, &diskio.list_filename+3)
+        diskio.send_command(drivenumber, diskio.list_filename)
+    }
+
+    sub mkdir(ubyte drivenumber, str name) {
+        ; -- make a new subdirectory.
+        diskio.list_filename[0] = 'm'
+        diskio.list_filename[1] = 'd'
+        diskio.list_filename[2] = ':'
+        void string.copy(name, &diskio.list_filename+3)
+        diskio.send_command(drivenumber, diskio.list_filename)
+    }
+
+    sub rmdir(ubyte drivenumber, str name) {
+        ; -- remove a subdirectory.
+        void string.find(name, '*')
+        if_cs
+            return    ; refuse to act on a wildcard *
+        diskio.list_filename[0] = 'r'
+        diskio.list_filename[1] = 'd'
+        diskio.list_filename[2] = ':'
+        void string.copy(name, &diskio.list_filename+3)
+        diskio.send_command(drivenumber, diskio.list_filename)
+    }
+
+    sub relabel(ubyte drivenumber, str name) {
+        ; -- change the disk label.
+        diskio.list_filename[0] = 'r'
+        diskio.list_filename[1] = '-'
+        diskio.list_filename[2] = 'h'
+        diskio.list_filename[3] = ':'
+        void string.copy(name, &diskio.list_filename+4)
+        diskio.send_command(drivenumber, diskio.list_filename)
+    }
+
+    sub f_seek(uword pos_hiword, uword pos_loword) {
+        ; -- seek in the reading file opened with f_open, to the given 32-bits position
+        ubyte[6] command = ['p',0,0,0,0,0]
+        command[1] = 12       ; f_open uses channel 12
+        command[2] = lsb(pos_loword)
+        command[3] = msb(pos_loword)
+        command[4] = lsb(pos_hiword)
+        command[5] = msb(pos_hiword)
+    send_command:
+        c64.SETNAM(sizeof(command), &command)
+        c64.SETLFS(15, diskio.last_drivenumber, 15)
+        void c64.OPEN()
+        c64.CLOSE(15)
+    }
+
+    ; TODO see if we can get this to work as well:
+;    sub f_seek_w(uword pos_hiword, uword pos_loword) {
+;        ; -- seek in the output file opened with f_open_w, to the given 32-bits position
+;        cx16diskio.f_seek.command[1] = 13       ; f_open_w uses channel 13
+;        cx16diskio.f_seek.command[2] = lsb(pos_loword)
+;        cx16diskio.f_seek.command[3] = msb(pos_loword)
+;        cx16diskio.f_seek.command[4] = lsb(pos_hiword)
+;        cx16diskio.f_seek.command[5] = msb(pos_hiword)
+;        goto cx16diskio.f_seek.send_command
+;    }
+}

compiler/res/prog8lib/cx16/diskio.p8

@@ -1,797 +0,0 @@
-; Commander X16 disk drive I/O routines.
-; Largely compatible with the default C64 ones, but adds more stuff specific to the X16 as well.
-
-%import textio
-%import string
-%import syslib
-
-diskio {
-    %option no_symbol_prefixing
-
-    ubyte drivenumber = 8
-
-    sub set_drive(ubyte number) {
-        drivenumber = number
-    }
-
-    sub directory() -> bool {
-        ; -- Prints the directory contents to the screen. Returns success.
-
-        cbm.SETNAM(1, "$")
-        cbm.SETLFS(12, drivenumber, 0)
-        ubyte status = 1
-        void cbm.OPEN()          ; open 12,8,0,"$"
-        if_cs
-            goto io_error
-        void cbm.CHKIN(12)        ; use #12 as input channel
-        if_cs
-            goto io_error
-
-        repeat 4 {
-            void cbm.CHRIN()     ; skip the 4 prologue bytes
-        }
-
-        ; while not stop key pressed / EOF encountered, read data.
-        status = cbm.READST()
-        if status!=0 {
-            status = 1
-            goto io_error
-        }
-
-        while status==0 {
-            ubyte low = cbm.CHRIN()
-            ubyte high = cbm.CHRIN()
-            txt.print_uw(mkword(high, low))
-            txt.spc()
-            ubyte @zp char
-            repeat {
-                char = cbm.CHRIN()
-                if char==0
-                    break
-                txt.chrout(char)
-            }
-            txt.nl()
-            void cbm.CHRIN()     ; skip 2 bytes
-            void cbm.CHRIN()
-            status = cbm.READST()
-            if cbm.STOP2()
-                break
-        }
-        status = cbm.READST()
-
-io_error:
-        cbm.CLRCHN()        ; restore default i/o devices
-        cbm.CLOSE(12)
-
-        if status and status & $40 == 0 {            ; bit 6=end of file
-            txt.print("\ni/o error, status: ")
-            txt.print_ub(status)
-            txt.nl()
-            return false
-        }
-
-        return true
-    }
-
-    sub diskname() -> uword {
-        ; returns disk label name or 0 if error
-        cbm.SETNAM(3, "$")
-        cbm.SETLFS(12, diskio.drivenumber, 0)
-        ubyte status = 1
-        void cbm.OPEN()          ; open 12,8,0,"$=c"
-        if_cs
-            goto io_error
-        void cbm.CHKIN(12)        ; use #12 as input channel
-        if_cs
-            goto io_error
-
-        while cbm.CHRIN()!='"' {
-            ; skip up to entry name
-        }
-
-        cx16.r0 = &diskio.list_filename
-        repeat {
-            @(cx16.r0) = cbm.CHRIN()
-            if @(cx16.r0)=='"' {
-                @(cx16.r0) = ' '
-                while @(cx16.r0)==' ' and cx16.r0>=&diskio.list_filename {
-                    @(cx16.r0) = 0
-                    cx16.r0--
-                }
-                break
-            }
-            cx16.r0++
-        }
-        status = cbm.READST()
-
-io_error:
-        cbm.CLRCHN()
-        cbm.CLOSE(12)
-        if status and status & $40 == 0
-            return 0
-        return diskio.list_filename
-    }
-
-    ; internal variables for the iterative file lister / loader
-    bool list_skip_disk_name
-    uword list_pattern
-    uword list_blocks
-    bool iteration_in_progress = false
-    str list_filetype = "???"       ; prg, seq, dir
-    str list_filename = "?" * 50
-
-    ; ----- get a list of files (uses iteration functions internally) -----
-
-    sub list_filenames(uword pattern_ptr, uword filenames_buffer, uword filenames_buf_size) -> ubyte {
-        ; -- fill the provided buffer with the names of the files on the disk (until buffer is full).
-        ;    Files in the buffer are separeted by a 0 byte. You can provide an optional pattern to match against.
-        ;    After the last filename one additional 0 byte is placed to indicate the end of the list.
-        ;    Returns number of files (it skips 'dir' entries i.e. subdirectories).
-        ;    Also sets carry on exit: Carry clear = all files returned, Carry set = directory has more files that didn't fit in the buffer.
-        uword buffer_start = filenames_buffer
-        ubyte files_found = 0
-        if lf_start_list(pattern_ptr) {
-            while lf_next_entry() {
-                if list_filetype!="dir" {
-                    filenames_buffer += string.copy(list_filename, filenames_buffer) + 1
-                    files_found++
-                    if filenames_buffer - buffer_start > filenames_buf_size-20 {
-                        @(filenames_buffer)=0
-                        lf_end_list()
-                        sys.set_carry()
-                        return files_found
-                    }
-                }
-            }
-            lf_end_list()
-        }
-        @(filenames_buffer)=0
-        sys.clear_carry()
-        return files_found
-    }
-
-    ; ----- iterative file lister functions (uses io channel 12) -----
-
-    sub lf_start_list(uword pattern_ptr) -> bool {
-        ; -- start an iterative file listing with optional pattern matching.
-        ;    note: only a single iteration loop can be active at a time!
-        lf_end_list()
-        list_pattern = pattern_ptr
-        list_skip_disk_name = true
-        iteration_in_progress = true
-
-        cbm.SETNAM(1, "$")
-        cbm.SETLFS(12, drivenumber, 0)
-        void cbm.OPEN()          ; open 12,8,0,"$"
-        if_cs
-            goto io_error
-        void cbm.CHKIN(12)        ; use #12 as input channel
-        if_cs
-            goto io_error
-
-        repeat 4 {
-            void cbm.CHRIN()     ; skip the 4 prologue bytes
-        }
-
-        if cbm.READST()==0
-            return true
-
-io_error:
-        lf_end_list()
-        return false
-    }
-
-    sub lf_next_entry() -> bool {
-        ; -- retrieve the next entry from an iterative file listing session.
-        ;    results will be found in list_blocks, list_filename, and list_filetype.
-        ;    if it returns false though, there are no more entries (or an error occurred).
-
-        if not iteration_in_progress
-            return false
-
-        repeat {
-            void cbm.CHKIN(12)        ; use #12 as input channel again
-
-            uword nameptr = &list_filename
-            ubyte blocks_lsb = cbm.CHRIN()
-            ubyte blocks_msb = cbm.CHRIN()
-
-            if cbm.READST()
-                goto close_end
-
-            list_blocks = mkword(blocks_msb, blocks_lsb)
-
-            ; read until the filename starts after the first "
-            while cbm.CHRIN()!='\"'  {
-                if cbm.READST()
-                    goto close_end
-            }
-
-            ; read the filename
-            repeat {
-                ubyte char = cbm.CHRIN()
-                if char==0
-                    break
-                if char=='\"'
-                    break
-                @(nameptr) = char
-                nameptr++
-            }
-
-            @(nameptr) = 0
-
-            do {
-                cx16.r15L = cbm.CHRIN()
-            } until cx16.r15L!=' '      ; skip blanks up to 3 chars entry type
-            list_filetype[0] = cx16.r15L
-            list_filetype[1] = cbm.CHRIN()
-            list_filetype[2] = cbm.CHRIN()
-            while cbm.CHRIN() {
-                ; read the rest of the entry until the end
-            }
-
-            void cbm.CHRIN()     ; skip 2 bytes
-            void cbm.CHRIN()
-
-            if not list_skip_disk_name {
-                if not list_pattern
-                    return true
-                if string.pattern_match(list_filename, list_pattern)
-                    return true
-            }
-            list_skip_disk_name = false
-        }
-
-close_end:
-        lf_end_list()
-        return false
-    }
-
-    sub lf_end_list() {
-        ; -- end an iterative file listing session (close channels).
-        if iteration_in_progress {
-            cbm.CLRCHN()
-            cbm.CLOSE(12)
-            iteration_in_progress = false
-        }
-    }
-
-
-    ; ----- iterative file loader functions (uses io channel 12) -----
-
-    sub f_open(uword filenameptr) -> bool {
-        ; -- open a file for iterative reading with f_read
-        ;    note: only a single iteration loop can be active at a time!
-        f_close()
-
-        cbm.SETNAM(string.length(filenameptr), filenameptr)
-        cbm.SETLFS(12, drivenumber, 12)     ; note: has to be 12,x,12 because otherwise f_seek doesn't work
-        void cbm.OPEN()          ; open 12,8,12,"filename"
-        if_cc {
-            if cbm.READST()==0 {
-                iteration_in_progress = true
-                void cbm.CHKIN(12)          ; use #12 as input channel
-                if_cc {
-                    void cbm.CHRIN()        ; read first byte to test for file not found
-                    if not cbm.READST() {
-                        cbm.CLOSE(12)           ; close file because we already consumed first byte
-                        void cbm.OPEN()         ; re-open the file
-                        void cbm.CHKIN(12)
-                        return true
-                    }
-                }
-            }
-        }
-        f_close()
-        return false
-    }
-
-    ; optimized for Commander X16 to use MACPTR block read kernal call
-    sub f_read(uword bufferpointer, uword num_bytes) -> uword {
-        ; -- read from the currently open file, up to the given number of bytes.
-        ;    returns the actual number of bytes read.  (checks for End-of-file and error conditions)
-        if not iteration_in_progress or not num_bytes
-            return 0
-
-        list_blocks = 0     ; we reuse this variable for the total number of bytes read
-
-        ; commander X16 supports fast block-read via macptr() kernal call
-        uword size
-        while num_bytes {
-            size = 255
-            if num_bytes<size
-                size = num_bytes
-            size = cx16.macptr(lsb(size), bufferpointer, false)
-            if_cs
-                goto byte_read_loop     ; macptr block read not supported, do fallback loop
-            list_blocks += size
-            bufferpointer += size
-            if msb(bufferpointer) == $c0
-                bufferpointer = mkword($a0, lsb(bufferpointer))  ; wrap over bank boundary
-            num_bytes -= size
-            if cbm.READST() & $40 {
-                f_close()       ; end of file, close it
-                break
-            }
-        }
-        return list_blocks  ; number of bytes read
-
-byte_read_loop:         ; fallback if macptr() isn't supported on the device
-        %asm {{
-            lda  bufferpointer
-            sta  m_in_buffer+1
-            lda  bufferpointer+1
-            sta  m_in_buffer+2
-        }}
-        while num_bytes {
-            if cbm.READST() {
-                f_close()
-                if cbm.READST() & $40    ; eof?
-                    return list_blocks   ; number of bytes read
-                return 0  ; error.
-            }
-            %asm {{
-                jsr  cbm.CHRIN
-m_in_buffer     sta  $ffff
-                inc  m_in_buffer+1
-                bne  +
-                inc  m_in_buffer+2
-+
-            }}
-            list_blocks++
-            num_bytes--
-        }
-        return list_blocks  ; number of bytes read
-    }
-
-    ; optimized for Commander X16 to use MACPTR block read kernal call
-    sub f_read_all(uword bufferpointer) -> uword {
-        ; -- read the full contents of the file, returns number of bytes read.
-        if not iteration_in_progress
-            return 0
-
-        uword total_read = 0
-        while not cbm.READST() {
-            cx16.r0 = f_read(bufferpointer, 256)
-            total_read += cx16.r0
-            bufferpointer += cx16.r0
-        }
-        return total_read
-    }
-
-    asmsub f_readline(uword bufptr @AY) clobbers(X) -> ubyte @Y {
-        ; Routine to read text lines from a text file. Lines must be less than 255 characters.
-        ; Reads characters from the input file UNTIL a newline or return character (or EOF).
-        ; The line read will be 0-terminated in the buffer (and not contain the end of line character).
-        ; The length of the line is returned in Y. Note that an empty line is okay and is length 0!
-        ; I/O error status should be checked by the caller itself via READST() routine.
-        %asm {{
-            sta  P8ZP_SCRATCH_W1
-            sty  P8ZP_SCRATCH_W1+1
-            ldx  #12
-            jsr  cbm.CHKIN              ; use channel 12 again for input
-            ldy  #0
-_loop       jsr  cbm.CHRIN
-            sta  (P8ZP_SCRATCH_W1),y
-            beq  _end
-            iny
-            cmp  #$0a
-            beq  _line_end
-            cmp  #$0d
-            bne  _loop
-_line_end   dey     ; get rid of the trailing end-of-line char
-            lda  #0
-            sta  (P8ZP_SCRATCH_W1),y
-_end        rts
-        }}
-    }
-
-    sub f_close() {
-        ; -- end an iterative file loading session (close channels).
-        if iteration_in_progress {
-            cbm.CLRCHN()
-            cbm.CLOSE(12)
-            iteration_in_progress = false
-        }
-    }
-
-
-    ; ----- iterative file writing functions (uses io channel 13) -----
-
-    sub f_open_w(uword filenameptr) -> bool {
-        ; -- open a file for iterative writing with f_write
-        f_close_w()
-
-        cbm.SETNAM(string.length(filenameptr), filenameptr)
-        cbm.SETLFS(13, drivenumber, 1)
-        void cbm.OPEN()             ; open 13,8,1,"filename"
-        if_cc {
-            cbm.CHKOUT(13)          ; use #13 as output channel
-            return not cbm.READST()
-        }
-        f_close_w()
-        return false
-    }
-
-    sub f_write(uword bufferpointer, uword num_bytes) -> bool {
-        ; -- write the given number of bytes to the currently open file
-        if num_bytes!=0 {
-            cbm.CHKOUT(13)        ; use #13 as output channel again
-            repeat num_bytes {
-                cbm.CHROUT(@(bufferpointer))
-                bufferpointer++
-            }
-            return not cbm.READST()
-        }
-        return true
-    }
-
-    sub f_close_w() {
-        ; -- end an iterative file writing session (close channels).
-        cbm.CLRCHN()
-        cbm.CLOSE(13)
-    }
-
-
-    ; ---- other functions ----
-
-    sub status() -> uword {
-        ; -- retrieve the disk drive's current status message
-        uword messageptr = &list_filename
-        cbm.SETNAM(0, list_filename)
-        cbm.SETLFS(15, drivenumber, 15)
-        void cbm.OPEN()          ; open 15,8,15
-        if_cs
-            goto io_error
-        void cbm.CHKIN(15)        ; use #15 as input channel
-        if_cs
-            goto io_error
-
-        while not cbm.READST() {
-            cx16.r5L = cbm.CHRIN()
-            if cx16.r5L=='\r' or cx16.r5L=='\n'
-                break
-            @(messageptr) = cx16.r5L
-            messageptr++
-        }
-        @(messageptr) = 0
-
-done:
-        cbm.CLRCHN()        ; restore default i/o devices
-        cbm.CLOSE(15)
-        return list_filename
-
-io_error:
-        list_filename = "?disk error"
-        goto done
-    }
-
-
-    ; saves a block of memory to disk, including the default 2 byte prg header.
-    sub save(uword filenameptr, uword address, uword size) -> bool {
-        return internal_save_routine(filenameptr, address, size, false)
-    }
-
-    ; like save() but omits the 2 byte prg header.
-    sub save_raw(uword filenameptr, uword address, uword size) -> bool {
-        return internal_save_routine(filenameptr, address, size, true)
-    }
-
-    sub internal_save_routine(uword filenameptr, uword address, uword size, bool headerless) -> bool {
-        cbm.SETNAM(string.length(filenameptr), filenameptr)
-        cbm.SETLFS(1, drivenumber, 0)
-        uword @shared end_address = address + size
-        cx16.r0L = 0
-
-        %asm {{
-            lda  address
-            sta  P8ZP_SCRATCH_W1
-            lda  address+1
-            sta  P8ZP_SCRATCH_W1+1
-            stx  P8ZP_SCRATCH_REG
-            ldx  end_address
-            ldy  end_address+1
-            lda  headerless
-            beq  +
-            lda  #<P8ZP_SCRATCH_W1
-            jsr  cx16.BSAVE
-            bra  ++
-+           lda  #<P8ZP_SCRATCH_W1
-            jsr  cbm.SAVE
-+           php
-            ldx  P8ZP_SCRATCH_REG
-            plp
-        }}
-
-        if_cc
-            cx16.r0L = cbm.READST()==0
-
-        cbm.CLRCHN()
-        cbm.CLOSE(1)
-
-        return cx16.r0L
-    }
-
-    ; Use kernal LOAD routine to load the given program file in memory.
-    ; This is similar to Basic's  LOAD "filename",drive  /  LOAD "filename",drive,1
-    ; If you don't give an address_override, the location in memory is taken from the 2-byte file header.
-    ; If you specify a custom address_override, the first 2 bytes in the file are ignored
-    ; and the rest is loaded at the given location in memory.
-    ; Returns the end load address+1 if successful or 0 if a load error occurred.
-    ; NOTE: when the load is larger than 64Kb and/or spans multiple RAM banks
-    ;       (which is possible on the Commander X16), the returned size is not correct,
-    ;       because it doesn't take the number of ram banks into account.
-    ;       You can use the load_size() function to calcuate the size in this case.
-    ; NOTE: data is read into the current Ram bank if you're reading into banked ram.
-    ;       if you require loading into another ram bank, you have to set that
-    ;       yourself using cx16.rambank(bank) before calling load().
-    sub load(uword filenameptr, uword address_override) -> uword {
-        return internal_load_routine(filenameptr, address_override, false)
-    }
-
-    ; Identical to load(), but DOES INCLUDE the first 2 bytes in the file.
-    ; No program header is assumed in the file. Everything is loaded.
-    ; See comments on load() for more details.
-    sub load_raw(uword filenameptr, uword address) -> uword {
-        return internal_load_routine(filenameptr, address, true)
-    }
-
-
-    sub internal_load_routine(uword filenameptr, uword address_override, bool headerless) -> uword {
-        cbm.SETNAM(string.length(filenameptr), filenameptr)
-        ubyte secondary = 1
-        cx16.r1 = 0
-        if address_override
-            secondary = 0
-        if headerless
-            secondary |= %00000010  ; activate cx16 kernal headerless load support
-        cbm.SETLFS(1, drivenumber, secondary)
-        %asm {{
-            stx  P8ZP_SCRATCH_REG
-            lda  #0
-            ldx  address_override
-            ldy  address_override+1
-            jsr  cbm.LOAD
-            bcs  +
-            stx  cx16.r1
-            sty  cx16.r1+1
-+           ldx  P8ZP_SCRATCH_REG
-        }}
-
-        cbm.CLRCHN()
-        cbm.CLOSE(1)
-        return cx16.r1
-    }
-
-    sub delete(uword filenameptr) {
-        ; -- delete a file on the drive
-        list_filename[0] = 's'
-        list_filename[1] = ':'
-        ubyte flen = string.copy(filenameptr, &list_filename+2)
-        cbm.SETNAM(flen+2, list_filename)
-        cbm.SETLFS(1, drivenumber, 15)
-        void cbm.OPEN()
-        cbm.CLRCHN()
-        cbm.CLOSE(1)
-    }
-
-    sub rename(uword oldfileptr, uword newfileptr) {
-        ; -- rename a file on the drive
-        list_filename[0] = 'r'
-        list_filename[1] = ':'
-        ubyte flen_new = string.copy(newfileptr, &list_filename+2)
-        list_filename[flen_new+2] = '='
-        ubyte flen_old = string.copy(oldfileptr, &list_filename+3+flen_new)
-        cbm.SETNAM(3+flen_new+flen_old, list_filename)
-        cbm.SETLFS(1, drivenumber, 15)
-        void cbm.OPEN()
-        cbm.CLRCHN()
-        cbm.CLOSE(1)
-    }
-
-    sub send_command(uword commandptr) {
-        ; -- send a dos command to the drive
-        cbm.SETNAM(string.length(commandptr), commandptr)
-        cbm.SETLFS(15, drivenumber, 15)
-        void cbm.OPEN()
-        cbm.CLRCHN()
-        cbm.CLOSE(15)
-    }
-
-
-    ; CommanderX16 extensions over the basic C64/C128 diskio routines:
-
-    ; For use directly after a load or load_raw call (don't mess with the ram bank yet):
-    ; Calculates the number of bytes loaded (files > 64Kb ar truncated to 16 bits)
-    sub load_size(ubyte startbank, uword startaddress, uword endaddress) -> uword {
-        return $2000 * (cx16.getrambank() - startbank) + endaddress - startaddress
-    }
-
-    asmsub vload(str name @R0, ubyte bank @A, uword address @R1) -> ubyte @A {
-        ; -- like the basic command VLOAD "filename",drivenumber,bank,address
-        ;    loads a file into Vera's video memory in the given bank:address, returns success in A
-        ;    the file has to have the usual 2 byte header (which will be skipped)
-        %asm {{
-            clc
-internal_vload:
-            phx
-            pha
-            ldx  drivenumber
-            bcc +
-            ldy  #%00000010     ; headerless load mode
-            bne  ++
-+           ldy  #0             ; normal load mode
-+           lda  #1
-            jsr  cbm.SETLFS
-            lda  cx16.r0
-            ldy  cx16.r0+1
-            jsr  prog8_lib.strlen
-            tya
-            ldx  cx16.r0
-            ldy  cx16.r0+1
-            jsr  cbm.SETNAM
-            pla
-            clc
-            adc  #2
-            ldx  cx16.r1
-            ldy  cx16.r1+1
-            stz  P8ZP_SCRATCH_B1
-            jsr  cbm.LOAD
-            bcs  +
-            inc  P8ZP_SCRATCH_B1
-    +       jsr  cbm.CLRCHN
-            lda  #1
-            jsr  cbm.CLOSE
-            plx
-            lda  P8ZP_SCRATCH_B1
-            rts
-        }}
-    }
-
-    asmsub vload_raw(str name @R0, ubyte bank @A, uword address @R1) -> ubyte @A {
-        ; -- like the basic command BVLOAD "filename",drivenumber,bank,address
-        ;    loads a file into Vera's video memory in the given bank:address, returns success in A
-        ;    the file is read fully including the first two bytes.
-        %asm {{
-            sec
-            jmp  vload.internal_vload
-        }}
-    }
-
-    sub chdir(str path) {
-        ; -- change current directory.
-        list_filename[0] = 'c'
-        list_filename[1] = 'd'
-        list_filename[2] = ':'
-        void string.copy(path, &list_filename+3)
-        send_command(list_filename)
-    }
-
-    sub mkdir(str name) {
-        ; -- make a new subdirectory.
-        list_filename[0] = 'm'
-        list_filename[1] = 'd'
-        list_filename[2] = ':'
-        void string.copy(name, &list_filename+3)
-        send_command(list_filename)
-    }
-
-    sub rmdir(str name) {
-        ; -- remove a subdirectory.
-        void string.find(name, '*')
-        if_cs
-            return    ; refuse to act on a wildcard *
-        list_filename[0] = 'r'
-        list_filename[1] = 'd'
-        list_filename[2] = ':'
-        void string.copy(name, &list_filename+3)
-        send_command(list_filename)
-    }
-
-    sub curdir() -> uword {
-        ; return current directory name or 0 if error
-        ; special X16 dos command to only return the current path in the entry list (R42+)
-        const ubyte MAX_PATH_LEN=80
-        uword reversebuffer = memory("curdir_buffer", MAX_PATH_LEN, 0)
-        cx16.r12 = reversebuffer + MAX_PATH_LEN-1
-        @(cx16.r12)=0
-        cbm.SETNAM(3, "$=c")
-        cbm.SETLFS(12, diskio.drivenumber, 0)
-        void cbm.OPEN()          ; open 12,8,0,"$=c"
-        if_cs
-            goto io_error
-        void cbm.CHKIN(12)        ; use #12 as input channel
-        if_cs
-            goto io_error
-
-        repeat 6 {
-            void cbm.CHRIN()
-        }
-        while cbm.CHRIN() {
-            ; skip first line (drive label)
-        }
-        while cbm.CHRIN()!='"' {
-            ; skip to first name
-        }
-        ubyte status = cbm.READST()
-        cx16.r10 = &list_filename
-        while status==0 {
-            repeat {
-                @(cx16.r10) = cbm.CHRIN()
-                if @(cx16.r10)==0
-                    break
-                cx16.r10++
-            }
-            while @(cx16.r10)!='"' and cx16.r10>=&list_filename {
-                @(cx16.r10)=0
-                cx16.r10--
-            }
-            @(cx16.r10)=0
-            prepend(list_filename)
-            cx16.r10 = &list_filename
-            while cbm.CHRIN()!='"' and status==0 {
-                status = cbm.READST()
-                ; skipping up to next entry name
-            }
-        }
-
-io_error:
-        cbm.CLRCHN()
-        cbm.CLOSE(12)
-        if status and status & $40 == 0
-            return 0
-        if @(cx16.r12)==0 {
-            cx16.r12--
-            @(cx16.r12)='/'
-        }
-        return cx16.r12
-
-        sub prepend(str dir) {
-            if dir[0]=='/' and dir[1]==0
-                return
-            cx16.r9L = string.length(dir)
-            cx16.r12 -= cx16.r9L
-            sys.memcopy(dir, cx16.r12, cx16.r9L)
-            cx16.r12--
-            @(cx16.r12)='/'
-        }
-    }
-
-    sub relabel(str name) {
-        ; -- change the disk label.
-        list_filename[0] = 'r'
-        list_filename[1] = '-'
-        list_filename[2] = 'h'
-        list_filename[3] = ':'
-        void string.copy(name, &list_filename+4)
-        send_command(list_filename)
-    }
-
-    sub f_seek(uword pos_hiword, uword pos_loword) {
-        ; -- seek in the reading file opened with f_open, to the given 32-bits position
-        ubyte[6] command = ['p',0,0,0,0,0]
-        command[1] = 12       ; f_open uses channel 12
-        command[2] = lsb(pos_loword)
-        command[3] = msb(pos_loword)
-        command[4] = lsb(pos_hiword)
-        command[5] = msb(pos_hiword)
-    send_command:
-        cbm.SETNAM(sizeof(command), &command)
-        cbm.SETLFS(15, drivenumber, 15)
-        void cbm.OPEN()
-        cbm.CLOSE(15)
-    }
-
-
-    ; NOTE: f_seek_w() doesn't work reliably right now. I only manage to corrupt the fat32 filesystem on the sdcard with it...
-;    sub f_seek_w(uword pos_hiword, uword pos_loword) {
-;        ; -- seek in the output file opened with f_open_w, to the given 32-bits position
-;        diskio.f_seek.command[1] = 13       ; f_open_w uses channel 13
-;        diskio.f_seek.command[2] = lsb(pos_loword)
-;        diskio.f_seek.command[3] = msb(pos_loword)
-;        diskio.f_seek.command[4] = lsb(pos_hiword)
-;        diskio.f_seek.command[5] = msb(pos_hiword)
-;        goto diskio.f_seek.send_command
-;    }
-
-}

compiler/res/prog8lib/cx16/floats.p8

@@ -6,8 +6,6 @@
 floats {
 	; ---- this block contains C-64 compatible floating point related functions ----
 
-    %option no_symbol_prefixing
-
         const float  PI     = 3.141592653589793
         const float  TWOPI  = 6.283185307179586
 

compiler/res/prog8lib/cx16/gfx2.p8

@@ -13,19 +13,16 @@
 ; SCREEN MODE LIST:
 ;   mode 0 = reset back to default text mode
 ;   mode 1 = bitmap 320 x 240 monochrome
-;   mode 2 = bitmap 320 x 240 x 4c (not yet implemented: just use 256c, there's enough vram for that)
-;   mode 3 = bitmap 320 x 240 x 16c (not yet implemented: just use 256c, there's enough vram for that)
+;   mode 2 = bitmap 320 x 240 x 4c (TODO not yet implemented)
+;   mode 3 = bitmap 320 x 240 x 16c (TODO not yet implemented)
 ;   mode 4 = bitmap 320 x 240 x 256c  (like SCREEN $80 but using this api instead of kernal)
 ;   mode 5 = bitmap 640 x 480 monochrome
 ;   mode 6 = bitmap 640 x 480 x 4c
 ;   higher color dephts in highres are not supported due to lack of VRAM
 
-; TODO remove the phx/plx pairs in non-stack compiler version
 
 gfx2 {
 
-    %option no_symbol_prefixing
-
     ; read-only control variables:
     ubyte active_mode = 0
     uword width = 0
@@ -47,7 +44,7 @@ gfx2 {
                 height = 240
                 bpp = 1
             }
-            ; TODO modes 2, 3
+            ; TODO modes 2, 3 not yet implemented
             4 -> {
                 ; lores 256c
                 cx16.VERA_DC_VIDEO = (cx16.VERA_DC_VIDEO & %11001111) | %00100000      ; enable only layer 1
@@ -87,7 +84,7 @@ gfx2 {
             else -> {
                 ; back to default text mode
                 cx16.r15L = cx16.VERA_DC_VIDEO & %00000111 ; retain chroma + output mode
-                cbm.CINT()
+                c64.CINT()
                 cx16.VERA_DC_VIDEO = (cx16.VERA_DC_VIDEO & %11111000) | cx16.r15L
                 width = 0
                 height = 0
@@ -110,7 +107,7 @@ gfx2 {
                 repeat 240/2/8
                     cs_innerloop640()
             }
-            ; TODO modes 2, 3
+            ; TODO mode 2, 3
             4 -> {
                 ; lores 256c
                 repeat 240/2
@@ -158,9 +155,6 @@ gfx2 {
     }
 
     sub horizontal_line(uword x, uword y, uword length, ubyte color) {
-        ubyte[9] masked_ends   = [ 0, %10000000, %11000000, %11100000, %11110000, %11111000, %11111100, %11111110, %11111111]
-        ubyte[9] masked_starts = [ 0, %00000001, %00000011, %00000111, %00001111, %00011111, %00111111, %01111111, %11111111]
-
         if length==0
             return
         when active_mode {
@@ -169,13 +163,12 @@ gfx2 {
                 ubyte separate_pixels = (8-lsb(x)) & 7
                 if separate_pixels as uword > length
                     separate_pixels = lsb(length)
-                if separate_pixels {
-                    position(x,y)
-                    cx16.VERA_ADDR_H &= %00000111   ; vera auto-increment off
-                    cx16.VERA_DATA0 = cx16.VERA_DATA0 | masked_starts[separate_pixels]
-                    length -= separate_pixels
-                    x += separate_pixels
+                repeat separate_pixels {
+                    ; TODO optimize this by writing a masked byte in 1 go
+                    plot(x, y, color)
+                    x++
                 }
+                length -= separate_pixels
                 if length {
                     position(x, y)
                     separate_pixels = lsb(length) & 7
@@ -212,9 +205,11 @@ _loop                   lda  length
                         bra  _loop
 _done
                     }}
-
-                    cx16.VERA_ADDR_H &= %00000111   ; vera auto-increment off
-                    cx16.VERA_DATA0 = cx16.VERA_DATA0 | masked_ends[separate_pixels]
+                    repeat separate_pixels {
+                        ; TODO optimize this by writing a masked byte in 1 go
+                        plot(x, y, color)
+                        x++
+                    }
                 }
                 cx16.VERA_ADDR_H &= %00000111   ; vera auto-increment off again
             }
@@ -241,7 +236,8 @@ _done
                 }}
             }
             6 -> {
-                ; highres 4c ....also mostly usable for mode 2, lores 4c?
+                ; highres 4c
+                ; TODO also mostly usable for lores 4c?
                 color &= 3
                 ubyte[4] colorbits
                 ubyte ii
@@ -370,14 +366,8 @@ _done
                     return
                 position2(x,y,true)
                 set_both_strides(13)    ; 160 increment = 1 line in 640 px 4c mode
-                ;; color &= 3
-                ;; color <<= gfx2.plot.shift4c[lsb(x) & 3]
-                cx16.r2L = lsb(x) & 3
-                when color & 3 {
-                    1 -> color = gfx2.plot.shiftedleft_4c_1[cx16.r2L]
-                    2 -> color = gfx2.plot.shiftedleft_4c_2[cx16.r2L]
-                    3 -> color = gfx2.plot.shiftedleft_4c_3[cx16.r2L]
-                }
+                color &= 3
+                color <<= gfx2.plot.shift4c[lsb(x) & 3]         ; TODO with lookup table
                 ubyte @shared mask = gfx2.plot.mask4c[lsb(x) & 3]
                 repeat lheight {
                     %asm {{
@@ -557,13 +547,10 @@ _done
         }
     }
 
-    sub plot(uword @zp x, uword @zp y, ubyte @zp color) {
+    sub plot(uword @zp x, uword y, ubyte color) {
         ubyte[8] @shared bits = [128, 64, 32, 16, 8, 4, 2, 1]
         ubyte[4] @shared mask4c = [%00111111, %11001111, %11110011, %11111100]
         ubyte[4] @shared shift4c = [6,4,2,0]
-        ubyte[4] shiftedleft_4c_1 = [1<<6, 1<<4, 1<<2, 1<<0]
-        ubyte[4] shiftedleft_4c_2 = [2<<6, 2<<4, 2<<2, 2<<0]
-        ubyte[4] shiftedleft_4c_3 = [3<<6, 3<<4, 3<<2, 3<<0]
 
         when active_mode {
             1 -> {
@@ -600,7 +587,7 @@ _done
                     }}
                 }
             }
-            ; TODO modes 2, 3
+            ; TODO mode 2,3
             4 -> {
                 ; lores 256c
                 void addr_mul_24_for_lores_256c(y, x)      ; 24 bits result is in r0 and r1L (highest byte)
@@ -652,16 +639,12 @@ _done
                 }
             }
             6 -> {
-                ; highres 4c   ....also mostly usable for mode 2, lores 4c?
+                ; highres 4c
+                ; TODO also mostly usable for lores 4c?
                 void addr_mul_24_for_highres_4c(y, x)      ; 24 bits result is in r0 and r1L (highest byte)
                 cx16.r2L = lsb(x) & 3       ; xbits
-                ; color &= 3
-                ; color <<= shift4c[cx16.r2L]
-                when color & 3 {
-                    1 -> color = shiftedleft_4c_1[cx16.r2L]
-                    2 -> color = shiftedleft_4c_2[cx16.r2L]
-                    3 -> color = shiftedleft_4c_3[cx16.r2L]
-                }
+                color &= 3
+                color <<= shift4c[cx16.r2L]     ; TODO with lookup table
                 %asm {{
                     stz  cx16.VERA_CTRL
                     lda  cx16.r1L
@@ -706,7 +689,7 @@ _done
 +
                 }}
             }
-            ; TODO modes 2, 3
+            ; TODO mode 2 and 3
             4 -> {
                 ; lores 256c
                 void addr_mul_24_for_lores_256c(y, x)      ; 24 bits result is in r0 and r1L (highest byte)
@@ -760,138 +743,27 @@ _done
                     sta  cx16.r0L
                 }}
                 cx16.r1L = lsb(x) & 3
-                cx16.r0L >>= gfx2.plot.shift4c[cx16.r1L]
+                cx16.r0L >>= gfx2.plot.shift4c[cx16.r1L]        ; TODO with lookup table
                 return cx16.r0L & 3
             }
             else -> return 0
         }
     }
 
-    sub fill(word @zp x, word @zp y, ubyte new_color) {
-        ; Non-recursive scanline flood fill.
-        ; based loosely on code found here https://www.codeproject.com/Articles/6017/QuickFill-An-efficient-flood-fill-algorithm
-        ; with the fixes applied to the seedfill_4 routine as mentioned in the comments.
-        const ubyte MAXDEPTH = 48
-        word[MAXDEPTH] @split @shared stack_xl
-        word[MAXDEPTH] @split @shared stack_xr
-        word[MAXDEPTH] @split @shared stack_y
-        byte[MAXDEPTH] @shared stack_dy
-        cx16.r12L = 0       ; stack pointer
-        word x1
-        word x2
-        byte dy
-        cx16.r10L = new_color
-        sub push_stack(word sxl, word sxr, word sy, byte sdy) {
-            if cx16.r12L==MAXDEPTH
-                return
-            cx16.r0s = sy+sdy
-            if cx16.r0s>=0 and cx16.r0s<=height-1 {
-;;                stack_xl[cx16.r12L] = sxl
-;;                stack_xr[cx16.r12L] = sxr
-;;                stack_y[cx16.r12L] = sy
-;;                stack_dy[cx16.r12L] = sdy
-;;                cx16.r12L++
-                %asm {{
-                    ldy  cx16.r12L
-                    lda  sxl
-                    sta  stack_xl_lsb,y
-                    lda  sxl+1
-                    sta  stack_xl_msb,y
-                    lda  sxr
-                    sta  stack_xr_lsb,y
-                    lda  sxr+1
-                    sta  stack_xr_msb,y
-                    lda  sy
-                    sta  stack_y_lsb,y
-                    lda  sy+1
-                    sta  stack_y_msb,y
-                    ldy  cx16.r12L
-                    lda  sdy
-                    sta  stack_dy,y
-                    inc  cx16.r12L
-                }}
-            }
-        }
-        sub pop_stack() {
-;;            cx16.r12L--
-;;            x1 = stack_xl[cx16.r12L]
-;;            x2 = stack_xr[cx16.r12L]
-;;            y = stack_y[cx16.r12L]
-;;            dy = stack_dy[cx16.r12L]
-            %asm {{
-                dec  cx16.r12L
-                ldy  cx16.r12L
-                lda  stack_xl_lsb,y
-                sta  x1
-                lda  stack_xl_msb,y
-                sta  x1+1
-                lda  stack_xr_lsb,y
-                sta  x2
-                lda  stack_xr_msb,y
-                sta  x2+1
-                lda  stack_y_lsb,y
-                sta  y
-                lda  stack_y_msb,y
-                sta  y+1
-                ldy  cx16.r12L
-                lda  stack_dy,y
-                sta  dy
-            }}
-            y+=dy
-        }
-        cx16.r11L = pget(x as uword, y as uword)        ; old_color
-        if cx16.r11L == cx16.r10L
-            return
-        if x<0 or x > width-1 or y<0 or y > height-1
-            return
-        push_stack(x, x, y, 1)
-        push_stack(x, x, y + 1, -1)
-        word left = 0
-        while cx16.r12L {
-            pop_stack()
-            x = x1
-            while x >= 0 and pget(x as uword, y as uword) == cx16.r11L {
-                plot(x as uword, y as uword, cx16.r10L)
-                x--
-            }
-            if x>= x1
-                goto skip
-
-            left = x + 1
-            if left < x1
-                push_stack(left, x1 - 1, y, -dy)
-            x = x1 + 1
-
-            do {
-                while x <= width-1 and pget(x as uword, y as uword) == cx16.r11L {
-                    plot(x as uword, y as uword, cx16.r10L)
-                    x++
-                }
-                push_stack(left, x - 1, y, dy)
-                if x > x2 + 1
-                    push_stack(x2 + 1, x - 1, y, -dy)
-skip:
-                x++
-                while x <= x2 and pget(x as uword, y as uword) != cx16.r11L
-                    x++
-                left = x
-            } until x>x2
-        }
-    }
-
     sub position(uword @zp x, uword y) {
+        ubyte bank
         when active_mode {
             1 -> {
                 ; lores monochrome
                 cx16.r0 = y*(320/8) + x/8
                 cx16.vaddr(0, cx16.r0, 0, 1)
             }
-            ; TODO modes 2, 3
+            ; TODO modes 2,3
             4 -> {
                 ; lores 256c
                 void addr_mul_24_for_lores_256c(y, x)      ; 24 bits result is in r0 and r1L (highest byte)
-                cx16.r2L = cx16.r1L
-                cx16.vaddr(cx16.r2L, cx16.r0, 0, 1)
+                bank = lsb(cx16.r1)
+                cx16.vaddr(bank, cx16.r0, 0, 1)
             }
             5 -> {
                 ; highres monochrome
@@ -901,16 +773,24 @@ skip:
             6 -> {
                 ; highres 4c
                 void addr_mul_24_for_highres_4c(y, x)      ; 24 bits result is in r0 and r1L (highest byte)
-                cx16.r2L = cx16.r1L
-                cx16.vaddr(cx16.r2L, cx16.r0, 0, 1)
+                bank = lsb(cx16.r1)
+                cx16.vaddr(bank, cx16.r0, 0, 1)
             }
         }
     }
 
     sub position2(uword @zp x, uword y, bool also_port_1) {
         position(x, y)
-        if also_port_1
-            cx16.vaddr_clone(0)
+        if also_port_1 {
+            when active_mode {
+                1, 5 -> cx16.vaddr(0, cx16.r0, 1, 1)
+                ; TODO modes 2, 3
+                4, 6 -> {
+                    ubyte bank = lsb(cx16.r1)
+                    cx16.vaddr(bank, cx16.r0, 1, 1)
+                }
+            }
+        }
     }
 
     inline asmsub next_pixel(ubyte color @A) {
@@ -985,96 +865,48 @@ skip:
     sub text(uword @zp x, uword y, ubyte color, uword sctextptr) {
         ; -- Write some text at the given pixel position. The text string must be in screencode encoding (not petscii!).
         ;    You must also have called text_charset() first to select and prepare the character set to use.
+        ;    NOTE: in monochrome (1bpp) screen modes, x position is currently constrained to multiples of 8 !  TODO allow per-pixel horizontal positioning
+        ; TODO draw whole horizontal spans using vera auto increment if possible, instead of per-character columns
         uword chardataptr
-        ubyte[8] @shared char_bitmap_bytes_left
-        ubyte[8] @shared char_bitmap_bytes_right
-
         when active_mode {
             1, 5 -> {
                 ; monochrome mode, either resolution
-                cx16.r3 = sctextptr
-                while @(cx16.r3) {
-                    chardataptr = charset_addr + @(cx16.r3) * $0008
-                    ; copy the character bitmap into RAM
-                    cx16.vaddr_autoincr(charset_bank, chardataptr, 0, 1)
+                cx16.r2 = 40
+                if active_mode==5
+                    cx16.r2 = 80
+                while @(sctextptr) {
+                    chardataptr = charset_addr + (@(sctextptr) as uword)*8
+                    cx16.vaddr(charset_bank, chardataptr, 1, 1)
+                    position(x,y)
                     %asm {{
-                        ; pre-shift the bits
-                        phx ; TODO remove in non-stack version
-                        lda  text.x
-                        and  #7
+                        lda  cx16.VERA_ADDR_H
+                        and  #%111              ; don't auto-increment, we have to do that manually because of the ora
+                        sta  cx16.VERA_ADDR_H
+                        lda  color
                         sta  P8ZP_SCRATCH_B1
-                        ldy  #0
--                       lda  cx16.VERA_DATA0
-                        stz  P8ZP_SCRATCH_REG
-                        ldx  P8ZP_SCRATCH_B1
-                        cpx  #0
-                        beq  +
--                       lsr  a
-                        ror  P8ZP_SCRATCH_REG
-                        dex
+                        ldy  #8
+-                       lda  P8ZP_SCRATCH_B1
+                        bne  +                  ; white color, plot normally
+                        lda  cx16.VERA_DATA1
+                        eor  #255               ; black color, keep only the other pixels
+                        and  cx16.VERA_DATA0
+                        bra  ++
++                       lda  cx16.VERA_DATA0
+                        ora  cx16.VERA_DATA1
++                       sta  cx16.VERA_DATA0
+                        lda  cx16.VERA_ADDR_L
+                        clc
+                        adc  cx16.r2
+                        sta  cx16.VERA_ADDR_L
+                        bcc  +
+                        inc  cx16.VERA_ADDR_M
++                       inc  x
+                        bne  +
+                        inc  x+1
++                       dey
                         bne  -
-+                       sta  char_bitmap_bytes_left,y
-                        lda  P8ZP_SCRATCH_REG
-                        sta  char_bitmap_bytes_right,y
-                        iny
-                        cpy  #8
-                        bne  --
-                        plx     ; TODO remove in non-stack version
                     }}
-                    ; left part of shifted char
-                    position2(x, y, true)
-                    set_autoincrs_mode1_or_5()
-                    if color {
-                        %asm {{
-                            ldy  #0
--                           lda  char_bitmap_bytes_left,y
-                            ora  cx16.VERA_DATA1
-                            sta  cx16.VERA_DATA0
-                            iny
-                            cpy  #8
-                            bne  -
-                        }}
-                    } else {
-                        %asm {{
-                            ldy  #0
--                           lda  char_bitmap_bytes_left,y
-                            eor  #255
-                            and  cx16.VERA_DATA1
-                            sta  cx16.VERA_DATA0
-                            iny
-                            cpy  #8
-                            bne  -
-                        }}
-                    }
-                    ; right part of shifted char
-                    if lsb(x) & 7 {
-                        position2(x+8, y, true)
-                        set_autoincrs_mode1_or_5()
-                        if color {
-                            %asm {{
-                                ldy  #0
-    -                           lda  char_bitmap_bytes_right,y
-                                ora  cx16.VERA_DATA1
-                                sta  cx16.VERA_DATA0
-                                iny
-                                cpy  #8
-                                bne  -
-                            }}
-                        } else {
-                            %asm {{
-                                ldy  #0
-    -                           lda  char_bitmap_bytes_right,y
-                                eor  #255
-                                and  cx16.VERA_DATA1
-                                sta  cx16.VERA_DATA0
-                                iny
-                                cpy  #8
-                                bne  -
-                            }}
-                        }
-                    }
-                    cx16.r3++
-                    x += 8
+                    sctextptr++
                 }
             }
             4 -> {
@@ -1086,7 +918,7 @@ skip:
                         position(x,y)
                         y++
                         %asm {{
-                            phx ; TODO remove in non-stack version
+                            phx
                             ldx  color
                             lda  cx16.VERA_DATA1
                             sta  P8ZP_SCRATCH_B1
@@ -1098,7 +930,7 @@ skip:
 +                           lda  cx16.VERA_DATA0    ; don't write a pixel, but do advance to the next address
 +                           dey
                             bne  -
-                            plx ; TODO remove in non-stack version
+                            plx
                         }}
                     }
                     x+=8
@@ -1110,80 +942,30 @@ skip:
                 ; hires 4c
                 ; we're going to use a few cx16 registers to make sure every variable is in zeropage in the inner loop.
                 cx16.r11L = color
+                cx16.r8 = y
                 while @(sctextptr) {
                     chardataptr = charset_addr + (@(sctextptr) as uword)*8
-                    cx16.vaddr(charset_bank, chardataptr, 1, true)  ; for reading the chardata from Vera data channel 1
-                    position(x, y)              ; only calculated once, we update vera address in the loop instead
-                    cx16.VERA_ADDR_H &= $0f     ; no auto increment
                     repeat 8 {
-                        cx16.r10L = cx16.VERA_DATA1  ; get the next 8 horizontal character bits
+                        ; TODO rewrite this inner loop partly in assembly
+                        ;      requires expanding the charbits to 2-bits per pixel (based on color)
+                        ;      also it's way more efficient to draw whole horizontal spans instead of per-character
+                        cx16.r9L = cx16.vpeek(charset_bank, chardataptr)  ; get the 8 horizontal character bits
                         cx16.r7 = x
                         repeat 8 {
-                            cx16.r10L <<= 1
-                            if_cs {
-                                cx16.r2L = cx16.r7L & 3       ; xbits
-                                when cx16.r11L & 3 {
-                                    1 -> cx16.r12L = gfx2.plot.shiftedleft_4c_1[cx16.r2L]
-                                    2 -> cx16.r12L = gfx2.plot.shiftedleft_4c_2[cx16.r2L]
-                                    3 -> cx16.r12L = gfx2.plot.shiftedleft_4c_3[cx16.r2L]
-                                    else -> cx16.r12L = 0
-                                }
-                                cx16.VERA_DATA0 = cx16.VERA_DATA0 & gfx2.plot.mask4c[cx16.r2L] | cx16.r12L
-                            }
+                            cx16.r9L <<= 1
+                            if_cs
+                                plot(cx16.r7, cx16.r8, cx16.r11L)
                             cx16.r7++
-                            if (cx16.r7 & 3) == 0 {
-                                ; increment the pixel address by one
-                                %asm {{
-                                    stz  cx16.VERA_CTRL
-                                    clc
-                                    lda  cx16.VERA_ADDR_L
-                                    adc  #1
-                                    sta  cx16.VERA_ADDR_L
-                                    lda  cx16.VERA_ADDR_M
-                                    adc  #0
-                                    sta  cx16.VERA_ADDR_M
-                                    lda  cx16.VERA_ADDR_H
-                                    adc  #0
-                                    sta  cx16.VERA_ADDR_H
-                                }}
-                            }
                         }
-
-                        ; increment pixel address to the next line
-                        %asm {{
-                            stz  cx16.VERA_CTRL
-                            clc
-                            lda  cx16.VERA_ADDR_L
-                            adc  #(640-8)/4
-                            sta  cx16.VERA_ADDR_L
-                            lda  cx16.VERA_ADDR_M
-                            adc  #0
-                            sta  cx16.VERA_ADDR_M
-                            lda  cx16.VERA_ADDR_H
-                            adc  #0
-                            sta  cx16.VERA_ADDR_H
-                        }}
+                        chardataptr++
+                        cx16.r8++
                     }
                     x+=8
+                    cx16.r8-=8
                     sctextptr++
                 }
             }
         }
-
-        sub set_autoincrs_mode1_or_5() {
-            ; set autoincrements to go to next pixel row (40 or 80 increment)
-            if active_mode==1 {
-                cx16.VERA_CTRL = 0
-                cx16.VERA_ADDR_H = cx16.VERA_ADDR_H & $0f | (11<<4)
-                cx16.VERA_CTRL = 1
-                cx16.VERA_ADDR_H = cx16.VERA_ADDR_H & $0f | (11<<4)
-            } else {
-                cx16.VERA_CTRL = 0
-                cx16.VERA_ADDR_H = cx16.VERA_ADDR_H & $0f | (12<<4)
-                cx16.VERA_CTRL = 1
-                cx16.VERA_ADDR_H = cx16.VERA_ADDR_H & $0f | (12<<4)
-            }
-        }
     }
 
     asmsub cs_innerloop640() clobbers(Y) {

compiler/res/prog8lib/cx16/graphics.p8

@@ -10,8 +10,6 @@
 
 
 graphics {
-    %option no_symbol_prefixing
-
     const uword WIDTH = 320
     const ubyte HEIGHT = 240
 

compiler/res/prog8lib/cx16/palette.p8

@@ -2,10 +2,9 @@
 ; Should you want to restore the default palette, you have to reinitialize the Vera yourself.
 
 palette {
-    %option no_symbol_prefixing
 
     uword vera_palette_ptr
-    ubyte cc
+    ubyte c
 
     sub set_color(ubyte index, uword color) {
         vera_palette_ptr = $fa00+(index as uword * 2)
@@ -80,13 +79,13 @@ palette {
     sub set_grayscale() {
         vera_palette_ptr = $fa00
         repeat 16 {
-            cc=0
+            c=0
             repeat 16 {
-                cx16.vpoke(1, vera_palette_ptr, cc)
+                cx16.vpoke(1, vera_palette_ptr, c)
                 vera_palette_ptr++
-                cx16.vpoke(1, vera_palette_ptr, cc)
+                cx16.vpoke(1, vera_palette_ptr, c)
                 vera_palette_ptr++
-                cc += $11
+                c += $11
             }
         }
     }
@@ -151,11 +150,11 @@ palette {
     sub set_c64pepto() {
         vera_palette_ptr = $fa00
         repeat 16 {
-            for cc in 0 to 15 {
-                uword ccp = C64_colorpalette_pepto[cc]
-                cx16.vpoke(1, vera_palette_ptr, lsb(ccp))     ; G, B
+            for c in 0 to 15 {
+                uword cc = C64_colorpalette_pepto[c]
+                cx16.vpoke(1, vera_palette_ptr, lsb(cc))     ; G, B
                 vera_palette_ptr++
-                cx16.vpoke(1, vera_palette_ptr, msb(ccp))     ; R
+                cx16.vpoke(1, vera_palette_ptr, msb(cc))     ; R
                 vera_palette_ptr++
             }
         }
@@ -164,11 +163,11 @@ palette {
     sub set_c64light() {
         vera_palette_ptr = $fa00
         repeat 16 {
-            for cc in 0 to 15 {
-                uword ccp = C64_colorpalette_light[cc]
-                cx16.vpoke(1, vera_palette_ptr, lsb(ccp))     ; G, B
+            for c in 0 to 15 {
+                uword cc = C64_colorpalette_light[c]
+                cx16.vpoke(1, vera_palette_ptr, lsb(cc))     ; G, B
                 vera_palette_ptr++
-                cx16.vpoke(1, vera_palette_ptr, msb(ccp))     ; R
+                cx16.vpoke(1, vera_palette_ptr, msb(cc))     ; R
                 vera_palette_ptr++
             }
         }
@@ -177,11 +176,11 @@ palette {
     sub set_c64dark() {
         vera_palette_ptr = $fa00
         repeat 16 {
-            for cc in 0 to 15 {
-                uword ccp = C64_colorpalette_dark[cc]
-                cx16.vpoke(1, vera_palette_ptr, lsb(ccp))     ; G, B
+            for c in 0 to 15 {
+                uword cc = C64_colorpalette_dark[c]
+                cx16.vpoke(1, vera_palette_ptr, lsb(cc))     ; G, B
                 vera_palette_ptr++
-                cx16.vpoke(1, vera_palette_ptr, msb(ccp))     ; R
+                cx16.vpoke(1, vera_palette_ptr, msb(cc))     ; R
                 vera_palette_ptr++
             }
         }

compiler/res/prog8lib/cx16/psg.p8

@@ -1,8 +1,6 @@
 %import syslib
 
 psg {
-    %option no_symbol_prefixing
-
     ; $1F9C0 - $1F9FF 	16 blocks of 4 PSG registers (16 voices)
     ; 00  frequency word LSB
     ; 01  frequency word MSB.    freqword = HERZ / 0.3725290298461914
@@ -24,7 +22,10 @@ psg {
         ;    waveform = one of PULSE,SAWTOOTH,TRIANGLE,NOISE.
         ;    pulsewidth = 0-63.  Specifies the pulse width for waveform=PULSE.
         envelope_states[voice_num] = 255
-        sys.irqsafe_set_irqd()
+        %asm {{
+            php
+            sei
+        }}
         cx16.r0 = $f9c2 + voice_num * 4
         cx16.VERA_CTRL = 0
         cx16.VERA_ADDR_L = lsb(cx16.r0)
@@ -35,7 +36,9 @@ psg {
         cx16.VERA_DATA0 = waveform | pulsewidth
         envelope_volumes[voice_num] = mkword(volume, 0)
         envelope_maxvolumes[voice_num] = volume
-        sys.irqsafe_clear_irqd()
+        %asm {{
+            plp
+        }}
     }
 
 ;    sub freq_hz(ubyte voice_num, float hertz) {
@@ -50,7 +53,10 @@ psg {
         ;    voice_num = 0-15,  vera_freq = 0-65535  calculate this via the formula given in the Vera's PSG documentation.
         ;    (https://github.com/x16community/x16-docs/blob/master/VERA%20Programmer's%20Reference.md)
         ;    Write freq MSB first and then LSB to reduce the chance on clicks
-        sys.irqsafe_set_irqd()
+        %asm {{
+            php
+            sei
+        }}
         cx16.r0 = $f9c1 + voice_num * 4
         cx16.VERA_CTRL = 0
         cx16.VERA_ADDR_L = lsb(cx16.r0)
@@ -59,7 +65,9 @@ psg {
         cx16.VERA_DATA0 = msb(vera_freq)
         cx16.VERA_ADDR_L--
         cx16.VERA_DATA0 = lsb(vera_freq)
-        sys.irqsafe_clear_irqd()
+        %asm {{
+            plp
+        }}
     }
 
     sub volume(ubyte voice_num, ubyte vol) {
@@ -173,7 +181,7 @@ psg {
     }
 
     ubyte[16] envelope_states
-    uword[16] @split envelope_volumes      ; scaled by 256
+    uword[16] envelope_volumes      ; scaled by 256
     ubyte[16] envelope_attacks
     ubyte[16] envelope_sustains
     ubyte[16] envelope_releases

compiler/res/prog8lib/cx16/syslib.p8

@@ -1,11 +1,9 @@
 ; Prog8 definitions for the CommanderX16
 ; Including memory registers, I/O registers, Basic and Kernal subroutines.
 
-cbm {
+c64 {
 
-    ; Commodore (CBM) common variables, vectors and kernal routines
-
-    %option no_symbol_prefixing
+; ---- kernal routines, these are the same as on the Commodore-64 (hence the same block name) ----
 
 ; STROUT --> use txt.print
 ; CLEARSCR -> use txt.clear_screen
@@ -15,12 +13,12 @@ romsub $FF81 = CINT() clobbers(A,X,Y)                           ; (alias: SCINIT
 romsub $FF84 = IOINIT() clobbers(A, X)                          ; initialize I/O devices (CIA, SID, IRQ)
 romsub $FF87 = RAMTAS() clobbers(A,X,Y)                         ; initialize RAM, tape buffer, screen
 romsub $FF8A = RESTOR() clobbers(A,X,Y)                         ; restore default I/O vectors
-romsub $FF8D = VECTOR(uword userptr @ XY, bool dir @ Pc) clobbers(A,Y)     ; read/set I/O vector table
+romsub $FF8D = VECTOR(uword userptr @ XY, ubyte dir @ Pc) clobbers(A,Y)     ; read/set I/O vector table
 romsub $FF90 = SETMSG(ubyte value @ A)                          ; set Kernal message control flag
 romsub $FF93 = SECOND(ubyte address @ A) clobbers(A)            ; (alias: LSTNSA) send secondary address after LISTEN
 romsub $FF96 = TKSA(ubyte address @ A) clobbers(A)              ; (alias: TALKSA) send secondary address after TALK
-romsub $FF99 = MEMTOP(uword address @ XY, bool dir @ Pc) -> uword @ XY     ; read/set top of memory  pointer.   NOTE: as a Cx16 extension, also returns the number of RAM memory banks in register A !  See cx16.numbanks()
-romsub $FF9C = MEMBOT(uword address @ XY, bool dir @ Pc) -> uword @ XY     ; read/set bottom of memory  pointer
+romsub $FF99 = MEMTOP(uword address @ XY, ubyte dir @ Pc) -> uword @ XY     ; read/set top of memory  pointer.   NOTE: as a Cx16 extension, also returns the number of RAM memory banks in register A !  See cx16.numbanks()
+romsub $FF9C = MEMBOT(uword address @ XY, ubyte dir @ Pc) -> uword @ XY     ; read/set bottom of memory  pointer
 romsub $FF9F = SCNKEY() clobbers(A,X,Y)                         ; scan the keyboard
 romsub $FFA2 = SETTMO(ubyte timeout @ A)                        ; set time-out flag for IEEE bus
 romsub $FFA5 = ACPTR() -> ubyte @ A                             ; (alias: IECIN) input byte from serial bus
@@ -32,23 +30,23 @@ romsub $FFB4 = TALK(ubyte device @ A) clobbers(A)               ; command serial
 romsub $FFB7 = READST() -> ubyte @ A                            ; read I/O status word
 romsub $FFBA = SETLFS(ubyte logical @ A, ubyte device @ X, ubyte secondary @ Y)   ; set logical file parameters
 romsub $FFBD = SETNAM(ubyte namelen @ A, str filename @ XY)     ; set filename parameters
-romsub $FFC0 = OPEN() clobbers(X,Y) -> bool @Pc, ubyte @A      ; (via 794 ($31A)) open a logical file
+romsub $FFC0 = OPEN() clobbers(X,Y) -> ubyte @Pc, ubyte @A      ; (via 794 ($31A)) open a logical file
 romsub $FFC3 = CLOSE(ubyte logical @ A) clobbers(A,X,Y)         ; (via 796 ($31C)) close a logical file
-romsub $FFC6 = CHKIN(ubyte logical @ X) clobbers(A,X) -> bool @Pc    ; (via 798 ($31E)) define an input channel
+romsub $FFC6 = CHKIN(ubyte logical @ X) clobbers(A,X) -> ubyte @Pc    ; (via 798 ($31E)) define an input channel
 romsub $FFC9 = CHKOUT(ubyte logical @ X) clobbers(A,X)          ; (via 800 ($320)) define an output channel
 romsub $FFCC = CLRCHN() clobbers(A,X)                           ; (via 802 ($322)) restore default devices
 romsub $FFCF = CHRIN() clobbers(X, Y) -> ubyte @ A   ; (via 804 ($324)) input a character (for keyboard, read a whole line from the screen) A=byte read.
 romsub $FFD2 = CHROUT(ubyte char @ A)                           ; (via 806 ($326)) output a character
-romsub $FFD5 = LOAD(ubyte verify @ A, uword address @ XY) -> bool @Pc, ubyte @ A, uword @ XY     ; (via 816 ($330)) load from device
-romsub $FFD8 = SAVE(ubyte zp_startaddr @ A, uword endaddr @ XY) clobbers (X, Y) -> bool @ Pc, ubyte @ A       ; (via 818 ($332)) save to a device
+romsub $FFD5 = LOAD(ubyte verify @ A, uword address @ XY) -> ubyte @Pc, ubyte @ A, uword @ XY     ; (via 816 ($330)) load from device
+romsub $FFD8 = SAVE(ubyte zp_startaddr @ A, uword endaddr @ XY) -> ubyte @ Pc, ubyte @ A          ; (via 818 ($332)) save to a device
 romsub $FFDB = SETTIM(ubyte low @ A, ubyte middle @ X, ubyte high @ Y)      ; set the software clock
 romsub $FFDE = RDTIM() -> ubyte @ A, ubyte @ X, ubyte @ Y       ; read the software clock (A=lo,X=mid,Y=high)
-romsub $FFE1 = STOP() clobbers(X) -> bool @ Pz, ubyte @ A      ; (via 808 ($328)) check the STOP key (and some others in A)
-romsub $FFE4 = GETIN() clobbers(X,Y) -> bool @Pc, ubyte @ A    ; (via 810 ($32A)) get a character
+romsub $FFE1 = STOP() clobbers(X) -> ubyte @ Pz, ubyte @ A      ; (via 808 ($328)) check the STOP key (and some others in A)
+romsub $FFE4 = GETIN() clobbers(X,Y) -> ubyte @Pc, ubyte @ A    ; (via 810 ($32A)) get a character
 romsub $FFE7 = CLALL() clobbers(A,X)                            ; (via 812 ($32C)) close all files
 romsub $FFEA = UDTIM() clobbers(A,X)                            ; update the software clock
 romsub $FFED = SCREEN() -> ubyte @ X, ubyte @ Y                 ; read number of screen rows and columns
-romsub $FFF0 = PLOT(ubyte col @ Y, ubyte row @ X, bool dir @ Pc) -> ubyte @ X, ubyte @ Y       ; read/set position of cursor on screen.  Use txt.plot for a 'safe' wrapper that preserves X.
+romsub $FFF0 = PLOT(ubyte col @ Y, ubyte row @ X, ubyte dir @ Pc) -> ubyte @ X, ubyte @ Y       ; read/set position of cursor on screen.  Use txt.plot for a 'safe' wrapper that preserves X.
 romsub $FFF3 = IOBASE() -> uword @ XY                           ; read base address of I/O devices
 
 ; ---- utility
@@ -57,7 +55,7 @@ asmsub STOP2() -> ubyte @A  {
     ; -- check if STOP key was pressed, returns true if so.  More convenient to use than STOP() because that only sets the carry status flag.
     %asm {{
         phx
-        jsr  cbm.STOP
+        jsr  c64.STOP
         beq  +
         plx
         lda  #0
@@ -69,14 +67,13 @@ asmsub STOP2() -> ubyte @A  {
 }
 
 asmsub RDTIM16() -> uword @AY {
-    ; --  like RDTIM() but only returning the lower 16 bits in AY for convenience. Also avoids ram bank issue for irqs.
+    ; --  like RDTIM() but only returning the lower 16 bits in AY for convenience
     %asm {{
         phx
         php
         sei
-        jsr  cbm.RDTIM
+        jsr  c64.RDTIM
         plp
-        cli
         pha
         txa
         tay
@@ -90,40 +87,38 @@ asmsub RDTIM16() -> uword @AY {
 
 cx16 {
 
-    %option no_symbol_prefixing
-
 ; irq, system and hardware vectors:
-    &uword  IERROR      = $0300
-    &uword  IMAIN       = $0302
-    &uword  ICRNCH      = $0304
-    &uword  IQPLOP      = $0306
-    &uword  IGONE       = $0308
-    &uword  IEVAL       = $030a
-    &ubyte  SAREG       = $030c     ; register storage for A for SYS calls
-    &ubyte  SXREG       = $030d     ; register storage for X for SYS calls
-    &ubyte  SYREG       = $030e     ; register storage for Y for SYS calls
-    &ubyte  SPREG       = $030f     ; register storage for P (status register) for SYS calls
-    &uword  USRADD      = $0311     ; vector for the USR() basic command
+    &uword  IERROR          = $0300
+    &uword  IMAIN           = $0302
+    &uword  ICRNCH          = $0304
+    &uword  IQPLOP          = $0306
+    &uword  IGONE           = $0308
+    &uword  IEVAL           = $030a
+    &ubyte  SAREG           = $030c     ; register storage for A for SYS calls
+    &ubyte  SXREG           = $030d     ; register storage for X for SYS calls
+    &ubyte  SYREG           = $030e     ; register storage for Y for SYS calls
+    &ubyte  SPREG           = $030f     ; register storage for P (status register) for SYS calls
+    &uword  USRADD          = $0311     ; vector for the USR() basic command
     ; $0313 is unused.
-    &uword  CINV        = $0314     ; IRQ vector (in ram)
-    &uword  CBINV       = $0316     ; BRK vector (in ram)
-    &uword  NMINV       = $0318     ; NMI vector (in ram)
-    &uword  IOPEN       = $031a
-    &uword  ICLOSE      = $031c
-    &uword  ICHKIN      = $031e
-    &uword  ICKOUT      = $0320
-    &uword  ICLRCH      = $0322
-    &uword  IBASIN      = $0324
-    &uword  IBSOUT      = $0326
-    &uword  ISTOP       = $0328
-    &uword  IGETIN      = $032a
-    &uword  ICLALL      = $032c
-    &uword  KEYHDL      = $032e     ; keyboard scan code handler see examples/cx16/keyboardhandler.p8
-    &uword  ILOAD       = $0330
-    &uword  ISAVE       = $0332
-    &uword  NMI_VEC     = $FFFA     ; 65c02 nmi vector, determined by the kernal if banked in
-    &uword  RESET_VEC   = $FFFC     ; 65c02 reset vector, determined by the kernal if banked in
-    &uword  IRQ_VEC     = $FFFE     ; 65c02 interrupt vector, determined by the kernal if banked in
+    &uword  CINV            = $0314     ; IRQ vector (in ram)
+    &uword  CBINV           = $0316     ; BRK vector (in ram)
+    &uword  NMINV           = $0318     ; NMI vector (in ram)
+    &uword  IOPEN           = $031a
+    &uword  ICLOSE          = $031c
+    &uword  ICHKIN          = $031e
+    &uword  ICKOUT          = $0320
+    &uword  ICLRCH          = $0322
+    &uword  IBASIN          = $0324
+    &uword  IBSOUT          = $0326
+    &uword  ISTOP           = $0328
+    &uword  IGETIN          = $032a
+    &uword  ICLALL          = $032c
+    &uword  KEYHDL          = $032e     ; keyboard scan code handler see examples/cx16/keyboardhandler.p8
+    &uword  ILOAD           = $0330
+    &uword  ISAVE           = $0332
+    &uword  NMI_VEC         = $FFFA     ; 65c02 nmi vector, determined by the kernal if banked in
+    &uword  RESET_VEC       = $FFFC     ; 65c02 reset vector, determined by the kernal if banked in
+    &uword  IRQ_VEC         = $FFFE     ; 65c02 interrupt vector, determined by the kernal if banked in
 
 
 ; the sixteen virtual 16-bit registers in both normal unsigned mode and signed mode (s)
@@ -279,44 +274,44 @@ cx16 {
 ; I/O
 
     const uword  VIA1_BASE   = $9f00                  ;VIA 6522 #1
-    &ubyte  via1prb    = VIA1_BASE + 0
-    &ubyte  via1pra    = VIA1_BASE + 1
-    &ubyte  via1ddrb   = VIA1_BASE + 2
-    &ubyte  via1ddra   = VIA1_BASE + 3
-    &ubyte  via1t1l    = VIA1_BASE + 4
-    &ubyte  via1t1h    = VIA1_BASE + 5
-    &ubyte  via1t1ll   = VIA1_BASE + 6
-    &ubyte  via1t1lh   = VIA1_BASE + 7
-    &ubyte  via1t2l    = VIA1_BASE + 8
-    &ubyte  via1t2h    = VIA1_BASE + 9
-    &ubyte  via1sr     = VIA1_BASE + 10
-    &ubyte  via1acr    = VIA1_BASE + 11
-    &ubyte  via1pcr    = VIA1_BASE + 12
-    &ubyte  via1ifr    = VIA1_BASE + 13
-    &ubyte  via1ier    = VIA1_BASE + 14
-    &ubyte  via1ora    = VIA1_BASE + 15
+    &ubyte  via1prb	= VIA1_BASE + 0
+    &ubyte  via1pra	= VIA1_BASE + 1
+    &ubyte  via1ddrb	= VIA1_BASE + 2
+    &ubyte  via1ddra	= VIA1_BASE + 3
+    &ubyte  via1t1l	= VIA1_BASE + 4
+    &ubyte  via1t1h	= VIA1_BASE + 5
+    &ubyte  via1t1ll	= VIA1_BASE + 6
+    &ubyte  via1t1lh	= VIA1_BASE + 7
+    &ubyte  via1t2l	= VIA1_BASE + 8
+    &ubyte  via1t2h	= VIA1_BASE + 9
+    &ubyte  via1sr	= VIA1_BASE + 10
+    &ubyte  via1acr	= VIA1_BASE + 11
+    &ubyte  via1pcr	= VIA1_BASE + 12
+    &ubyte  via1ifr	= VIA1_BASE + 13
+    &ubyte  via1ier	= VIA1_BASE + 14
+    &ubyte  via1ora	= VIA1_BASE + 15
 
     const uword  VIA2_BASE   = $9f10                  ;VIA 6522 #2
-    &ubyte  via2prb    = VIA2_BASE + 0
-    &ubyte  via2pra    = VIA2_BASE + 1
-    &ubyte  via2ddrb   = VIA2_BASE + 2
-    &ubyte  via2ddra   = VIA2_BASE + 3
-    &ubyte  via2t1l    = VIA2_BASE + 4
-    &ubyte  via2t1h    = VIA2_BASE + 5
-    &ubyte  via2t1ll   = VIA2_BASE + 6
-    &ubyte  via2t1lh   = VIA2_BASE + 7
-    &ubyte  via2t2l    = VIA2_BASE + 8
-    &ubyte  via2t2h    = VIA2_BASE + 9
-    &ubyte  via2sr     = VIA2_BASE + 10
-    &ubyte  via2acr    = VIA2_BASE + 11
-    &ubyte  via2pcr    = VIA2_BASE + 12
-    &ubyte  via2ifr    = VIA2_BASE + 13
-    &ubyte  via2ier    = VIA2_BASE + 14
-    &ubyte  via2ora    = VIA2_BASE + 15
+    &ubyte  via2prb	= VIA2_BASE + 0
+    &ubyte  via2pra	= VIA2_BASE + 1
+    &ubyte  via2ddrb	= VIA2_BASE + 2
+    &ubyte  via2ddra	= VIA2_BASE + 3
+    &ubyte  via2t1l	= VIA2_BASE + 4
+    &ubyte  via2t1h	= VIA2_BASE + 5
+    &ubyte  via2t1ll	= VIA2_BASE + 6
+    &ubyte  via2t1lh	= VIA2_BASE + 7
+    &ubyte  via2t2l	= VIA2_BASE + 8
+    &ubyte  via2t2h	= VIA2_BASE + 9
+    &ubyte  via2sr	= VIA2_BASE + 10
+    &ubyte  via2acr	= VIA2_BASE + 11
+    &ubyte  via2pcr	= VIA2_BASE + 12
+    &ubyte  via2ifr	= VIA2_BASE + 13
+    &ubyte  via2ier	= VIA2_BASE + 14
+    &ubyte  via2ora	= VIA2_BASE + 15
 
 ; YM-2151 sound chip
     &ubyte  YM_ADDRESS	= $9f40
-    &ubyte  YM_DATA	    = $9f41
+    &ubyte  YM_DATA	= $9f41
 
     const uword  extdev	= $9f60
 
@@ -328,7 +323,7 @@ cx16 {
 romsub $ff4a = close_all(ubyte device @A)  clobbers(A,X,Y)
 romsub $ff59 = lkupla(ubyte la @A)  clobbers(A,X,Y)
 romsub $ff5c = lkupsa(ubyte sa @Y)  clobbers(A,X,Y)
-romsub $ff5f = screen_mode(ubyte mode @A, bool getCurrent @Pc)  clobbers(X, Y) -> ubyte @A, bool @Pc        ; note: X,Y size result is not supported, use SCREEN or get_screen_mode routine for that
+romsub $ff5f = screen_mode(ubyte mode @A, ubyte getCurrent @Pc)  clobbers(A, X, Y) -> ubyte @Pc
 romsub $ff62 = screen_set_charset(ubyte charset @A, uword charsetptr @XY)  clobbers(A,X,Y)      ; incompatible with C128  dlchr()
 ; not yet supported: romsub $ff65 = pfkey()  clobbers(A,X,Y)
 romsub $ff6e = jsrfar()  ; following word = address to call, byte after that=rom/ram bank it is in
@@ -345,12 +340,12 @@ romsub $ff23 = GRAPH_clear()  clobbers(A,X,Y)
 romsub $ff26 = GRAPH_set_window(uword x @R0, uword y @R1, uword width @R2, uword height @R3)  clobbers(A,X,Y)
 romsub $ff29 = GRAPH_set_colors(ubyte stroke @A, ubyte fill @X, ubyte background @Y)  clobbers (A,X,Y)
 romsub $ff2c = GRAPH_draw_line(uword x1 @R0, uword y1 @R1, uword x2 @R2, uword y2 @R3)  clobbers(A,X,Y)
-romsub $ff2f = GRAPH_draw_rect(uword x @R0, uword y @R1, uword width @R2, uword height @R3, uword cornerradius @R4, bool fill @Pc)  clobbers(A,X,Y)
+romsub $ff2f = GRAPH_draw_rect(uword x @R0, uword y @R1, uword width @R2, uword height @R3, uword cornerradius @R4, ubyte fill @Pc)  clobbers(A,X,Y)
 romsub $ff32 = GRAPH_move_rect(uword sx @R0, uword sy @R1, uword tx @R2, uword ty @R3, uword width @R4, uword height @R5)  clobbers(A,X,Y)
-romsub $ff35 = GRAPH_draw_oval(uword x @R0, uword y @R1, uword width @R2, uword height @R3, bool fill @Pc)  clobbers(A,X,Y)
+romsub $ff35 = GRAPH_draw_oval(uword x @R0, uword y @R1, uword width @R2, uword height @R3, ubyte fill @Pc)  clobbers(A,X,Y)
 romsub $ff38 = GRAPH_draw_image(uword x @R0, uword y @R1, uword ptr @R2, uword width @R3, uword height @R4)  clobbers(A,X,Y)
 romsub $ff3b = GRAPH_set_font(uword fontptr @R0)  clobbers(A,X,Y)
-romsub $ff3e = GRAPH_get_char_size(ubyte baseline @A, ubyte width @X, ubyte height_or_style @Y, bool is_control @Pc)  clobbers(A,X,Y)
+romsub $ff3e = GRAPH_get_char_size(ubyte baseline @A, ubyte width @X, ubyte height_or_style @Y, ubyte is_control @Pc)  clobbers(A,X,Y)
 romsub $ff41 = GRAPH_put_char(uword x @R0, uword y @R1, ubyte char @A)  clobbers(A,X,Y)
 romsub $ff41 = GRAPH_put_next_char(ubyte char @A)  clobbers(A,X,Y)     ; alias for the routine above that doesn't reset the position of the initial character
 
@@ -372,17 +367,16 @@ romsub $ff1a = FB_filter_pixels(uword pointer @ R0, uword count @R1)  clobbers(A
 romsub $ff1d = FB_move_pixels(uword sx @R0, uword sy @R1, uword tx @R2, uword ty @R3, uword count @R4)  clobbers(A,X,Y)
 
 ; misc
-romsub $FEBA = BSAVE(ubyte zp_startaddr @ A, uword endaddr @ XY) clobbers (X, Y) -> bool @ Pc, ubyte @ A      ; like cbm.SAVE, but omits the 2-byte prg header
-romsub $fec6 = i2c_read_byte(ubyte device @X, ubyte offset @Y) clobbers (X,Y) -> ubyte @A, bool @Pc
-romsub $fec9 = i2c_write_byte(ubyte device @X, ubyte offset @Y, ubyte data @A) clobbers (A,X,Y) -> bool @Pc
-romsub $fef0 = sprite_set_image(uword pixels @R0, uword mask @R1, ubyte bpp @R2, ubyte number @A, ubyte width @X, ubyte height @Y, bool apply_mask @Pc)  clobbers(A,X,Y) -> bool @Pc
+romsub $fec6 = i2c_read_byte(ubyte device @X, ubyte offset @Y) clobbers (X,Y) -> ubyte @A, ubyte @Pc
+romsub $fec9 = i2c_write_byte(ubyte device @X, ubyte offset @Y, ubyte data @A) clobbers (A,X,Y) -> ubyte @Pc
+romsub $fef0 = sprite_set_image(uword pixels @R0, uword mask @R1, ubyte bpp @R2, ubyte number @A, ubyte width @X, ubyte height @Y, ubyte apply_mask @Pc)  clobbers(A,X,Y) -> ubyte @Pc
 romsub $fef3 = sprite_set_position(uword x @R0, uword y @R1, ubyte number @A)  clobbers(A,X,Y)
 romsub $fee4 = memory_fill(uword address @R0, uword num_bytes @R1, ubyte value @A)  clobbers(A,X,Y)
 romsub $fee7 = memory_copy(uword source @R0, uword target @R1, uword num_bytes @R2)  clobbers(A,X,Y)
 romsub $feea = memory_crc(uword address @R0, uword num_bytes @R1)  clobbers(A,X,Y) -> uword @R2
 romsub $feed = memory_decompress(uword input @R0, uword output @R1)  clobbers(A,X,Y) -> uword @R1       ; last address +1 is result in R1
 romsub $fedb = console_init(uword x @R0, uword y @R1, uword width @R2, uword height @R3)  clobbers(A,X,Y)
-romsub $fede = console_put_char(ubyte char @A, bool wrapping @Pc)  clobbers(A,X,Y)
+romsub $fede = console_put_char(ubyte char @A, ubyte wrapping @Pc)  clobbers(A,X,Y)
 romsub $fee1 = console_get_char()  clobbers(X,Y) -> ubyte @A
 romsub $fed8 = console_put_image(uword pointer @R0, uword width @R1, uword height @R2)  clobbers(A,X,Y)
 romsub $fed5 = console_set_paging_message(uword msgptr @R0)  clobbers(A,X,Y)
@@ -390,7 +384,7 @@ romsub $fecf = entropy_get() -> ubyte @A, ubyte @X, ubyte @Y
 romsub $fecc = monitor()  clobbers(A,X,Y)
 
 romsub $ff44 = macptr(ubyte length @A, uword buffer @XY, bool dontAdvance @Pc)  clobbers(A) -> bool @Pc, uword @XY
-romsub $ff47 = enter_basic(bool cold_or_warm @Pc)  clobbers(A,X,Y)
+romsub $ff47 = enter_basic(ubyte cold_or_warm @Pc)  clobbers(A,X,Y)
 romsub $ff4d = clock_set_date_time(uword yearmonth @R0, uword dayhours @R1, uword minsecs @R2, ubyte jiffies @R3)  clobbers(A, X, Y)
 romsub $ff50 = clock_get_date_time()  clobbers(A, X, Y)  -> uword @R0, uword @R1, uword @R2, ubyte @R3   ; result registers see clock_set_date_time()
 
@@ -407,37 +401,18 @@ romsub $ff53 = joystick_scan()  clobbers(A, X, Y)
 romsub $ff56 = joystick_get(ubyte joynr @A) -> ubyte @A, ubyte @X, ubyte @Y
 romsub $ff56 = joystick_get2(ubyte joynr @A) clobbers(Y) -> uword @AX   ; alternative to above to not have the hassle to deal with multiple return values
 
-; Audio (rom bank 10)
+; Audio (bank 10)
 romsub $C04B = psg_init() clobbers(A,X,Y)
-romsub $C063 = ym_init() clobbers(A,X,Y) -> bool @Pc                   ; (re)init YM chip
-romsub $C066 = ym_loaddefpatches() clobbers(A,X,Y) -> bool @Pc         ; load default YM patches
-romsub $C09F = audio_init() clobbers(A,X,Y) -> bool @Pc                ; (re)initialize PSG and YM audio chips
+romsub $C063 = ym_init() clobbers(A,X,Y) -> ubyte @Pc                   ; (re)init YM chip
+romsub $C066 = ym_loaddefpatches() clobbers(A,X,Y) -> ubyte @Pc         ; load default YM patches
+romsub $C09F = audio_init() clobbers(A,X,Y) -> ubyte @Pc                ; (re)initialize PSG and YM audio chips
 ; TODO: add more of the audio routines?
 
 
-asmsub set_screen_mode(ubyte mode @A) clobbers(A,X,Y) -> bool @Pc {
-    ; -- convenience wrapper for screen_mode() to just set a new mode (and return success)
-    %asm {{
-        clc
-        jmp  screen_mode
-    }}
-}
-
-asmsub get_screen_mode() -> byte @A, byte @X, byte @Y {
-    ; -- convenience wrapper for screen_mode() to just get the current mode in A, and size in characters in X+Y
-    ;    this does need a piece of inlined asm to call it ans store the result values if you call this from prog8 code
-    ;    Note: you can also just do the SEC yourself and simply call screen_mode() directly,
-    ;          or use the existing SCREEN kernal routine for just getting the size in characters.
-    %asm {{
-        sec
-        jmp  screen_mode
-    }}
-}
-
 asmsub kbdbuf_clear() {
     ; -- convenience helper routine to clear the keyboard buffer
     %asm {{
--       jsr  cbm.GETIN
+-       jsr  c64.GETIN
         bne  -
         rts
     }}
@@ -510,7 +485,7 @@ asmsub numbanks() -> uword @AY {
     %asm {{
         phx
         sec
-        jsr  cbm.MEMTOP
+        jsr  c64.MEMTOP
         ldy  #0
         cmp  #0
         bne  +
@@ -539,8 +514,6 @@ asmsub vpeek(ubyte bank @A, uword address @XY) -> ubyte @A {
 
 asmsub vaddr(ubyte bank @A, uword address @R0, ubyte addrsel @R1, byte autoIncrOrDecrByOne @Y) clobbers(A) {
         ; -- setup the VERA's data address register 0 or 1
-        ;    with optional auto increment or decrement of 1.
-        ;    Note that the vaddr_autoincr() and vaddr_autodecr() routines allow to set all possible strides, not just 1.
         %asm {{
             and  #1
             pha
@@ -564,105 +537,6 @@ asmsub vaddr(ubyte bank @A, uword address @R0, ubyte addrsel @R1, byte autoIncrO
         }}
 }
 
-asmsub vaddr_clone(ubyte port @A) clobbers (A,X,Y) {
-    ; -- clones Vera addresses from the given source port to the other one.
-    ;    leaves CTRL on the destination port.
-    %asm {{
-        sta  VERA_CTRL
-        ldx  VERA_ADDR_L
-        ldy  VERA_ADDR_H
-        phy
-        ldy  VERA_ADDR_M
-        eor  #1
-        sta  VERA_CTRL
-        stx  VERA_ADDR_L
-        sty  VERA_ADDR_M
-        ply
-        sty  VERA_ADDR_H
-        rts
-    }}
-}
-
-asmsub vaddr_autoincr(ubyte bank @A, uword address @R0, ubyte addrsel @R1, uword autoIncrAmount @R2) clobbers(A,Y) {
-        ; -- setup the VERA's data address register 0 or 1
-        ;    including setting up optional auto increment amount.
-        ;    Specifiying an unsupported amount results in amount of zero. See the Vera docs about what amounts are possible.
-        %asm {{
-            jsr  _setup
-            lda  cx16.r2H
-            ora  cx16.r2L
-            beq  +
-            jsr  _determine_incr_bits
-+           ora  P8ZP_SCRATCH_REG
-            sta  cx16.VERA_ADDR_H
-            rts
-
-_setup      and  #1
-            sta  P8ZP_SCRATCH_REG
-            lda  cx16.r1
-            and  #1
-            sta  cx16.VERA_CTRL
-            lda  cx16.r0
-            sta  cx16.VERA_ADDR_L
-            lda  cx16.r0+1
-            sta  cx16.VERA_ADDR_M
-            rts
-
-_determine_incr_bits
-            lda  cx16.r2H
-            bne  _large
-            lda  cx16.r2L
-            ldy  #13
--           cmp  _strides_lsb,y
-            beq  +
-            dey
-            bpl  -
-+           tya
-            asl  a
-            asl  a
-            asl  a
-            asl  a
-            rts
-_large      ora  cx16.r2L
-            cmp  #1         ; 256
-            bne  +
-            lda  #9<<4
-            rts
-+           cmp  #2         ; 512
-            bne  +
-            lda  #10<<4
-            rts
-+           cmp  #65        ; 320
-            bne  +
-            lda  #14<<4
-            rts
-+           cmp  #130       ; 640
-            bne  +
-            lda  #15<<4
-            rts
-+           lda  #0
-            rts
-_strides_lsb    .byte   0,1,2,4,8,16,32,64,128,255,255,40,80,160,255,255
-        }}
-}
-
-asmsub vaddr_autodecr(ubyte bank @A, uword address @R0, ubyte addrsel @R1, uword autoDecrAmount @R2) clobbers(A,Y) {
-        ; -- setup the VERA's data address register 0 or 1
-        ;    including setting up optional auto decrement amount.
-        ;    Specifiying an unsupported amount results in amount of zero. See the Vera docs about what amounts are possible.
-        %asm {{
-            jsr  vaddr_autoincr._setup
-            lda  cx16.r2H
-            ora  cx16.r2L
-            beq  +
-            jsr  vaddr_autoincr._determine_incr_bits
-            ora  #%00001000         ; autodecrement
-+           ora  P8ZP_SCRATCH_REG
-            sta  cx16.VERA_ADDR_H
-            rts
-        }}
-}
-
 asmsub vpoke(ubyte bank @A, uword address @R0, ubyte value @Y) clobbers(A) {
     ; -- write a single byte to VERA's video memory
     ;    note: inefficient when writing multiple sequential bytes!
@@ -753,91 +627,7 @@ asmsub vpoke_mask(ubyte bank @A, uword address @R0, ubyte mask @X, ubyte value @
     }}
 }
 
-asmsub save_virtual_registers() clobbers(A,Y) {
-    %asm {{
-        ldy  #31
--       lda  cx16.r0,y
-        sta  _cx16_vreg_storage,y
-        dey
-        bpl  -
-        rts
-
-_cx16_vreg_storage
-        .word 0,0,0,0,0,0,0,0
-        .word 0,0,0,0,0,0,0,0
-    }}
-}
-
-asmsub restore_virtual_registers() clobbers(A,Y) {
-    %asm {{
-        ldy  #31
--       lda  save_virtual_registers._cx16_vreg_storage,y
-        sta  cx16.r0,y
-        dey
-        bpl  -
-        rts
-    }}
-}
-
-
-asmsub save_vera_context() clobbers(A) {
-    ; -- use this at the start of your IRQ handler if it uses Vera registers, to save the state
-    %asm {{
-        ; note cannot store this on cpu hardware stack because this gets called as a subroutine
-        lda  cx16.VERA_ADDR_L
-        sta  _vera_storage
-        lda  cx16.VERA_ADDR_M
-        sta  _vera_storage+1
-        lda  cx16.VERA_ADDR_H
-        sta  _vera_storage+2
-        lda  cx16.VERA_CTRL
-        sta  _vera_storage+3
-        eor  #1
-        sta  _vera_storage+7
-        sta  cx16.VERA_CTRL
-        lda  cx16.VERA_ADDR_L
-        sta  _vera_storage+4
-        lda  cx16.VERA_ADDR_M
-        sta  _vera_storage+5
-        lda  cx16.VERA_ADDR_H
-        sta  _vera_storage+6
-        rts
-_vera_storage:  .byte 0,0,0,0,0,0,0,0
-    }}
-}
-
-asmsub restore_vera_context() clobbers(A) {
-    ; -- use this at the end of your IRQ handler if it uses Vera registers, to restore the state
-    %asm {{
-        lda  cx16.save_vera_context._vera_storage+7
-        sta  cx16.VERA_CTRL
-        lda  cx16.save_vera_context._vera_storage+6
-        sta  cx16.VERA_ADDR_H
-        lda  cx16.save_vera_context._vera_storage+5
-        sta  cx16.VERA_ADDR_M
-        lda  cx16.save_vera_context._vera_storage+4
-        sta  cx16.VERA_ADDR_L
-        lda  cx16.save_vera_context._vera_storage+3
-        sta  cx16.VERA_CTRL
-        lda  cx16.save_vera_context._vera_storage+2
-        sta  cx16.VERA_ADDR_H
-        lda  cx16.save_vera_context._vera_storage+1
-        sta  cx16.VERA_ADDR_M
-        lda  cx16.save_vera_context._vera_storage+0
-        sta  cx16.VERA_ADDR_L
-        rts
-    }}
-}
-
-}
-
-sys {
-    ; ------- lowlevel system routines --------
-
-    %option no_symbol_prefixing
-
-    const ubyte target = 16         ;  compilation target specifier.  64 = C64,  128 = C128,  16 = CommanderX16.
-
+; ---- system stuff -----
 asmsub  init_system()  {
     ; Initializes the machine to a sane starting state.
     ; Called automatically by the loader program logic.
@@ -848,30 +638,29 @@ asmsub  init_system()  {
         tay
         jsr  cx16.mouse_config  ; disable mouse
         cld
-        lda  cx16.VERA_DC_VIDEO
+        lda  VERA_DC_VIDEO
         and  #%00000111 ; retain chroma + output mode
         sta  P8ZP_SCRATCH_REG
         lda  #$0a
         sta  $01        ; rom bank 10 (audio)
-        jsr  cx16.audio_init ; silence
+        jsr  audio_init ; silence
         stz  $01        ; rom bank 0 (kernal)
-        jsr  cbm.IOINIT
-        jsr  cbm.RESTOR
-        jsr  cbm.CINT
-        lda  cx16.VERA_DC_VIDEO
+        jsr  c64.IOINIT
+        jsr  c64.RESTOR
+        jsr  c64.CINT
+        lda  VERA_DC_VIDEO
         and  #%11111000
         ora  P8ZP_SCRATCH_REG
-        sta  cx16.VERA_DC_VIDEO  ; restore old output mode
+        sta  VERA_DC_VIDEO  ; restore old output mode
         lda  #$90       ; black
-        jsr  cbm.CHROUT
+        jsr  c64.CHROUT
         lda  #1
-        jsr  cbm.CHROUT ; swap fg/bg
+        sta  $00        ; select ram bank 1
+        jsr  c64.CHROUT ; swap fg/bg
         lda  #$9e       ; yellow
-        jsr  cbm.CHROUT
+        jsr  c64.CHROUT
         lda  #147       ; clear screen
-        jsr  cbm.CHROUT
-        lda  #PROG8_VARSHIGH_RAMBANK
-        sta  $00    ; select ram bank
+        jsr  c64.CHROUT
         lda  #0
         tax
         tay
@@ -889,8 +678,6 @@ asmsub  init_system_phase2()  {
         sta  restore_irq._orig_irqvec
         lda  cx16.CINV+1
         sta  restore_irq._orig_irqvec+1
-        lda  #PROG8_VARSHIGH_RAMBANK
-        sta  $00    ; select ram bank
         cli
         rts
     }}
@@ -908,7 +695,7 @@ asmsub  cleanup_at_exit() {
     }}
 }
 
-asmsub  set_irq(uword handler @AY, bool useKernal @Pc) clobbers(A)  {
+asmsub  set_irq(uword handler @AY, ubyte useKernal @Pc) clobbers(A)  {
 	%asm {{
 	        sta  _modified+1
 	        sty  _modified+2
@@ -987,6 +774,56 @@ IRQ_SCRATCH_ZPWORD2	.word  0
 		}}
 }
 
+asmsub save_vera_context() clobbers(A) {
+    ; -- use this at the start of your IRQ handler if it uses Vera registers, to save the state
+    %asm {{
+        ; note cannot store this on cpu hardware stack because this gets called as a subroutine
+        lda  cx16.VERA_ADDR_L
+        sta  _vera_storage
+        lda  cx16.VERA_ADDR_M
+        sta  _vera_storage+1
+        lda  cx16.VERA_ADDR_H
+        sta  _vera_storage+2
+        lda  cx16.VERA_CTRL
+        sta  _vera_storage+3
+        eor  #1
+        sta  _vera_storage+7
+        sta  cx16.VERA_CTRL
+        lda  cx16.VERA_ADDR_L
+        sta  _vera_storage+4
+        lda  cx16.VERA_ADDR_M
+        sta  _vera_storage+5
+        lda  cx16.VERA_ADDR_H
+        sta  _vera_storage+6
+        rts
+_vera_storage:  .byte 0,0,0,0,0,0,0,0
+    }}
+}
+
+asmsub restore_vera_context() clobbers(A) {
+    ; -- use this at the end of your IRQ handler if it uses Vera registers, to restore the state
+    %asm {{
+        lda  cx16.save_vera_context._vera_storage+7
+        sta  cx16.VERA_CTRL
+        lda  cx16.save_vera_context._vera_storage+6
+        sta  cx16.VERA_ADDR_H
+        lda  cx16.save_vera_context._vera_storage+5
+        sta  cx16.VERA_ADDR_M
+        lda  cx16.save_vera_context._vera_storage+4
+        sta  cx16.VERA_ADDR_L
+        lda  cx16.save_vera_context._vera_storage+3
+        sta  cx16.VERA_CTRL
+        lda  cx16.save_vera_context._vera_storage+2
+        sta  cx16.VERA_ADDR_H
+        lda  cx16.save_vera_context._vera_storage+1
+        sta  cx16.VERA_ADDR_M
+        lda  cx16.save_vera_context._vera_storage+0
+        sta  cx16.VERA_ADDR_L
+        rts
+    }}
+}
+
+
 asmsub  restore_irq() clobbers(A) {
 	%asm {{
 	    sei
@@ -1056,14 +893,23 @@ asmsub  set_rasterline(uword line @AY) {
     }}
 }
 
+}
+
+
+sys {
+    ; ------- lowlevel system routines --------
+
+    const ubyte target = 16         ;  compilation target specifier.  64 = C64,  128 = C128,  16 = CommanderX16.
+
+
     asmsub reset_system() {
         ; Soft-reset the system back to initial power-on Basic prompt.
         ; We do this via the SMC so that a true reset is performed that also resets the Vera fully.
         %asm {{
             sei
             ldx #$42
-            ldy #2
-            lda #0
+            ldy #1
+            tya
             jsr  cx16.i2c_write_byte
             bra  *
         }}
@@ -1095,11 +941,11 @@ _loop       lda  P8ZP_SCRATCH_W1
             rts
 
 +           sei
-            jsr  cbm.RDTIM
+            jsr  c64.RDTIM
             cli
             sta  P8ZP_SCRATCH_B1
 -           sei
-            jsr  cbm.RDTIM
+            jsr  c64.RDTIM
             cli
             cmp  P8ZP_SCRATCH_B1
             beq  -
@@ -1240,23 +1086,10 @@ _longcopy
         }}
     }
 
-    inline asmsub irqsafe_set_irqd() {
-        %asm {{
-        php
-        sei
-        }}
-    }
-
-    inline asmsub irqsafe_clear_irqd() {
-        %asm {{
-        plp
-        }}
-    }
-
     inline asmsub exit(ubyte returnvalue @A) {
         ; -- immediately exit the program with a return code in the A register
         %asm {{
-            jsr  cbm.CLRCHN		; reset i/o channels
+            jsr  c64.CLRCHN		; reset i/o channels
             ldx  prog8_lib.orig_stackpointer
             txs
             rts		; return to original caller

compiler/res/prog8lib/cx16/textio.p8

@@ -6,8 +6,6 @@
 
 txt {
 
-    %option no_symbol_prefixing
-
 const ubyte DEFAULT_WIDTH = 80
 const ubyte DEFAULT_HEIGHT = 60
 
@@ -35,10 +33,10 @@ asmsub column(ubyte col @A) clobbers(A, X, Y) {
     ; ---- set the cursor on the given column (starting with 0) on the current line
     %asm {{
         sec
-        jsr  cbm.PLOT
+        jsr  c64.PLOT
         tay
         clc
-        jmp  cbm.PLOT
+        jmp  c64.PLOT
     }}
 }
 
@@ -48,7 +46,7 @@ asmsub  fill_screen (ubyte char @ A, ubyte color @ Y) clobbers(A)  {
         sty  _ly+1
         phx
         pha
-        jsr  cbm.SCREEN             ; get dimensions in X/Y
+        jsr  c64.SCREEN             ; get dimensions in X/Y
         txa
         lsr  a
         lsr  a
@@ -96,7 +94,7 @@ asmsub  clear_screenchars (ubyte char @ A) clobbers(Y)  {
 	%asm {{
         phx
         pha
-        jsr  cbm.SCREEN             ; get dimensions in X/Y
+        jsr  c64.SCREEN             ; get dimensions in X/Y
         txa
         lsr  a
         lsr  a
@@ -127,7 +125,7 @@ asmsub  clear_screencolors (ubyte color @ A) clobbers(Y)  {
 	%asm {{
         phx
         sta  _la+1
-        jsr  cbm.SCREEN             ; get dimensions in X/Y
+        jsr  c64.SCREEN             ; get dimensions in X/Y
         txa
         lsr  a
         lsr  a
@@ -160,35 +158,35 @@ ubyte[16] color_to_charcode = [$90,$05,$1c,$9f,$9c,$1e,$1f,$9e,$81,$95,$96,$97,$
 
 sub color (ubyte txtcol) {
     txtcol &= 15
-    cbm.CHROUT(color_to_charcode[txtcol])
+    c64.CHROUT(color_to_charcode[txtcol])
 }
 
 sub color2 (ubyte txtcol, ubyte bgcol) {
     txtcol &= 15
     bgcol &= 15
-    cbm.CHROUT(color_to_charcode[bgcol])
-    cbm.CHROUT(1)       ; switch fg and bg colors
-    cbm.CHROUT(color_to_charcode[txtcol])
+    c64.CHROUT(color_to_charcode[bgcol])
+    c64.CHROUT(1)       ; switch fg and bg colors
+    c64.CHROUT(color_to_charcode[txtcol])
 }
 
 sub lowercase() {
-    cbm.CHROUT($0e)
+    c64.CHROUT($0e)
     ; this is not 100% compatible: cx16.screen_set_charset(3, 0)  ; lowercase petscii charset
 }
 
 sub uppercase() {
-    cbm.CHROUT($8e)
+    c64.CHROUT($8e)
     ; this is not 100% compatible: cx16.screen_set_charset(2, 0)  ; uppercase petscii charset
 }
 
 sub iso() {
-    cbm.CHROUT($0f)
+    c64.CHROUT($0f)
     ; This doesn't enable it completely: cx16.screen_set_charset(1, 0)  ; iso charset
 }
 
 sub iso_off() {
     ; -- you have to call this first when switching back from iso charset to regular charset.
-    cbm.CHROUT($8f)
+    c64.CHROUT($8f)
 }
 
 
@@ -197,7 +195,7 @@ asmsub  scroll_left() clobbers(A, Y)  {
 	;      contents of the rightmost column are unchanged, you should clear/refill this yourself
 	%asm {{
 	    phx
-	    jsr  cbm.SCREEN
+	    jsr  c64.SCREEN
 	    dex
 	    stx  _lx+1
         dey
@@ -238,12 +236,12 @@ _lx     ldx  #0                ; modified
 	}}
 }
 
-asmsub  scroll_right() clobbers(A,Y)  {
+asmsub  scroll_right() clobbers(A)  {
 	; ---- scroll the whole screen 1 character to the right
 	;      contents of the leftmost column are unchanged, you should clear/refill this yourself
 	%asm {{
 	    phx
-	    jsr  cbm.SCREEN
+	    jsr  c64.SCREEN
 	    dex
 	    stx  _lx+1
 	    txa
@@ -297,7 +295,7 @@ asmsub  scroll_up() clobbers(A, Y)  {
 	;      contents of the bottom row are unchanged, you should refill/clear this yourself
 	%asm {{
 	    phx
-	    jsr  cbm.SCREEN
+	    jsr  c64.SCREEN
 	    stx  _nextline+1
 	    dey
         sty  P8ZP_SCRATCH_B1
@@ -347,7 +345,7 @@ asmsub  scroll_down() clobbers(A, Y)  {
 	;      contents of the top row are unchanged, you should refill/clear this yourself
 	%asm {{
 	    phx
-	    jsr  cbm.SCREEN
+	    jsr  c64.SCREEN
 	    stx  _nextline+1
 	    dey
         sty  P8ZP_SCRATCH_B1
@@ -398,20 +396,20 @@ _nextline
 	}}
 }
 
-romsub $FFD2 = chrout(ubyte char @ A)    ; for consistency. You can also use cbm.CHROUT directly ofcourse.
+romsub $FFD2 = chrout(ubyte char @ A)    ; for consistency. You can also use c64.CHROUT directly ofcourse.
 
 asmsub  print (str text @ AY) clobbers(A,Y)  {
 	; ---- print null terminated string from A/Y
 	; note: the compiler contains an optimization that will replace
 	;       a call to this subroutine with a string argument of just one char,
-	;       by just one call to cbm.CHROUT of that single char.
+	;       by just one call to c64.CHROUT of that single char.
 	%asm {{
 		sta  P8ZP_SCRATCH_B1
 		sty  P8ZP_SCRATCH_REG
 		ldy  #0
 -		lda  (P8ZP_SCRATCH_B1),y
 		beq  +
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		iny
 		bne  -
 +		rts
@@ -425,11 +423,11 @@ asmsub  print_ub0  (ubyte value @ A) clobbers(A,Y)  {
 		jsr  conv.ubyte2decimal
 		pha
 		tya
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		pla
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		txa
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		plx
 		rts
 	}}
@@ -445,16 +443,16 @@ _print_byte_digits
 		cpy  #'0'
 		beq  +
 		tya
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		pla
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		bra  _ones
 +       pla
         cmp  #'0'
         beq  _ones
-        jsr  cbm.CHROUT
+        jsr  c64.CHROUT
 _ones   txa
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		plx
 		rts
 	}}
@@ -468,45 +466,45 @@ asmsub  print_b  (byte value @ A) clobbers(A,Y)  {
 		cmp  #0
 		bpl  +
 		lda  #'-'
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 +		pla
 		jsr  conv.byte2decimal
 		bra  print_ub._print_byte_digits
 	}}
 }
 
-asmsub  print_ubhex  (ubyte value @ A, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_ubhex  (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the ubyte in A in hex form (if Carry is set, a radix prefix '$' is printed as well)
 	%asm {{
 		phx
 		bcc  +
 		pha
 		lda  #'$'
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		pla
 +		jsr  conv.ubyte2hex
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		tya
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		plx
 		rts
 	}}
 }
 
-asmsub  print_ubbin  (ubyte value @ A, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_ubbin  (ubyte value @ A, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the ubyte in A in binary form (if Carry is set, a radix prefix '%' is printed as well)
 	%asm {{
 		phx
 		sta  P8ZP_SCRATCH_B1
 		bcc  +
 		lda  #'%'
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 +		ldy  #8
 -		lda  #'0'
 		asl  P8ZP_SCRATCH_B1
 		bcc  +
 		lda  #'1'
-+		jsr  cbm.CHROUT
++		jsr  c64.CHROUT
 		dey
 		bne  -
 		plx
@@ -514,7 +512,7 @@ asmsub  print_ubbin  (ubyte value @ A, bool prefix @ Pc) clobbers(A,Y)  {
 	}}
 }
 
-asmsub  print_uwbin  (uword value @ AY, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_uwbin  (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the uword in A/Y in binary form (if Carry is set, a radix prefix '%' is printed as well)
 	%asm {{
 		pha
@@ -526,7 +524,7 @@ asmsub  print_uwbin  (uword value @ AY, bool prefix @ Pc) clobbers(A,Y)  {
 	}}
 }
 
-asmsub  print_uwhex  (uword value @ AY, bool prefix @ Pc) clobbers(A,Y)  {
+asmsub  print_uwhex  (uword value @ AY, ubyte prefix @ Pc) clobbers(A,Y)  {
 	; ---- print the uword in A/Y in hexadecimal form (4 digits)
 	;      (if Carry is set, a radix prefix '$' is printed as well)
 	%asm {{
@@ -547,7 +545,7 @@ asmsub  print_uw0  (uword value @ AY) clobbers(A,Y)  {
 		ldy  #0
 -		lda  conv.uword2decimal.decTenThousands,y
         beq  +
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		iny
 		bne  -
 +		plx
@@ -570,14 +568,14 @@ asmsub  print_uw  (uword value @ AY) clobbers(A,Y)  {
 		bne  -
 
 _gotdigit
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		iny
 		lda  conv.uword2decimal.decTenThousands,y
 		bne  _gotdigit
 		rts
 _allzero
         lda  #'0'
-        jmp  cbm.CHROUT
+        jmp  c64.CHROUT
 	}}
 }
 
@@ -588,7 +586,7 @@ asmsub  print_w  (word value @ AY) clobbers(A,Y)  {
 		bpl  +
 		pha
 		lda  #'-'
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		tya
 		eor  #255
 		tay
@@ -609,7 +607,7 @@ asmsub  input_chars  (uword buffer @ AY) clobbers(A) -> ubyte @ Y  {
 		sta  P8ZP_SCRATCH_W1
 		sty  P8ZP_SCRATCH_W1+1
 		ldy  #0				; char counter = 0
--		jsr  cbm.CHRIN
+-		jsr  c64.CHRIN
 		cmp  #$0d			; return (ascii 13) pressed?
 		beq  +				; yes, end.
 		sta  (P8ZP_SCRATCH_W1),y	; else store char in buffer
@@ -771,7 +769,7 @@ asmsub  plot  (ubyte col @ Y, ubyte row @ A) clobbers(A) {
 		phx
 		tax
 		clc
-		jsr  cbm.PLOT
+		jsr  c64.PLOT
 		plx
 		rts
 	}}
@@ -780,7 +778,7 @@ asmsub  plot  (ubyte col @ Y, ubyte row @ A) clobbers(A) {
 asmsub width() clobbers(X,Y) -> ubyte @A {
     ; -- returns the text screen width (number of columns)
     %asm {{
-        jsr  cbm.SCREEN
+        jsr  c64.SCREEN
         txa
         rts
     }}
@@ -789,7 +787,7 @@ asmsub width() clobbers(X,Y) -> ubyte @A {
 asmsub height() clobbers(X, Y) -> ubyte @A {
     ; -- returns the text screen height (number of rows)
     %asm {{
-        jsr  cbm.SCREEN
+        jsr  c64.SCREEN
         tya
         rts
     }}

compiler/res/prog8lib/cx16logo.p8

@@ -3,8 +3,6 @@
 %import textio
 
 cx16logo {
-    %option no_symbol_prefixing
-
     sub logo_at(ubyte column, ubyte row) {
         uword strptr
         for strptr in logo_lines {

compiler/res/prog8lib/diskio.p8

@@ -1,66 +1,59 @@
-; C64/C128 disk drive I/O routines.
+; C64 and Cx16 disk drive I/O routines.
 
 %import textio
 %import string
 %import syslib
 
 diskio {
-    %option no_symbol_prefixing
 
-    ubyte drivenumber = 8
+    sub directory(ubyte drivenumber) -> bool {
+        ; -- Prints the directory contents of disk drive 8-11 to the screen. Returns success.
 
-    sub set_drive(ubyte number) {
-        drivenumber = number
-    }
-
-    sub directory() -> bool {
-        ; -- Prints the directory contents to the screen. Returns success.
-
-        cbm.SETNAM(1, "$")
-        cbm.SETLFS(12, drivenumber, 0)
+        c64.SETNAM(1, "$")
+        c64.SETLFS(12, drivenumber, 0)
         ubyte status = 1
-        void cbm.OPEN()          ; open 12,8,0,"$"
+        void c64.OPEN()          ; open 12,8,0,"$"
         if_cs
             goto io_error
-        void cbm.CHKIN(12)        ; use #12 as input channel
+        void c64.CHKIN(12)        ; use #12 as input channel
         if_cs
             goto io_error
 
         repeat 4 {
-            void cbm.CHRIN()     ; skip the 4 prologue bytes
+            void c64.CHRIN()     ; skip the 4 prologue bytes
         }
 
         ; while not stop key pressed / EOF encountered, read data.
-        status = cbm.READST()
+        status = c64.READST()
         if status!=0 {
             status = 1
             goto io_error
         }
 
         while status==0 {
-            ubyte low = cbm.CHRIN()
-            ubyte high = cbm.CHRIN()
+            ubyte low = c64.CHRIN()
+            ubyte high = c64.CHRIN()
             txt.print_uw(mkword(high, low))
             txt.spc()
             ubyte @zp char
             repeat {
-                char = cbm.CHRIN()
+                char = c64.CHRIN()
                 if char==0
                     break
                 txt.chrout(char)
             }
             txt.nl()
-            void cbm.CHRIN()     ; skip 2 bytes
-            void cbm.CHRIN()
-            status = cbm.READST()
-            if cbm.STOP2()
+            void c64.CHRIN()     ; skip 2 bytes
+            void c64.CHRIN()
+            status = c64.READST()
+            if c64.STOP2()
                 break
         }
-        status = cbm.READST()
+        status = c64.READST()
 
 io_error:
-        cbm.CLRCHN()        ; restore default i/o devices
-        cbm.CLOSE(12)
+        c64.CLRCHN()        ; restore default i/o devices
+        c64.CLOSE(12)
 
         if status and status & $40 == 0 {            ; bit 6=end of file
             txt.print("\ni/o error, status: ")
@@ -72,43 +65,37 @@ io_error:
         return true
     }
 
-    sub diskname() -> uword {
+    sub diskname(ubyte drivenumber) -> uword {
         ; -- Returns pointer to disk name string or 0 if failure.
 
-        cbm.SETNAM(1, "$")
-        cbm.SETLFS(12, drivenumber, 0)
+        c64.SETNAM(1, "$")
+        c64.SETLFS(12, drivenumber, 0)
         ubyte okay = false
-        void cbm.OPEN()          ; open 12,8,0,"$"
+        void c64.OPEN()          ; open 12,8,0,"$"
         if_cs
             goto io_error
-        void cbm.CHKIN(12)        ; use #12 as input channel
+        void c64.CHKIN(12)        ; use #12 as input channel
         if_cs
             goto io_error
 
-        while cbm.CHRIN()!='"' {
-            ; skip up to entry name
+        repeat 6 {
+            void c64.CHRIN()     ; skip the 6 prologue bytes
         }
-        if cbm.READST()!=0
+        if c64.READST()!=0
             goto io_error
 
         cx16.r0 = &list_filename
         repeat {
-            @(cx16.r0) = cbm.CHRIN()
-            if @(cx16.r0)=='"' {
-                @(cx16.r0) = ' '
-                while @(cx16.r0)==' ' and cx16.r0>=&diskio.list_filename {
-                    @(cx16.r0) = 0
-                    cx16.r0--
-                }
+            @(cx16.r0) = c64.CHRIN()
+            if @(cx16.r0)==0
                 break
-            }
             cx16.r0++
         }
         okay = true
 
 io_error:
-        cbm.CLRCHN()        ; restore default i/o devices
-        cbm.CLOSE(12)
+        c64.CLRCHN()        ; restore default i/o devices
+        c64.CLOSE(12)
         if okay
             return &list_filename
         return 0
@@ -119,12 +106,13 @@ io_error:
     uword list_pattern
     uword list_blocks
     bool iteration_in_progress = false
+    ubyte last_drivenumber = 8       ; which drive was last used for a f_open operation?
     str list_filetype = "???"       ; prg, seq, dir
     str list_filename = "?" * 50
 
     ; ----- get a list of files (uses iteration functions internally) -----
 
-    sub list_filenames(uword pattern_ptr, uword filenames_buffer, uword filenames_buf_size) -> ubyte {
+    sub list_filenames(ubyte drivenumber, uword pattern_ptr, uword filenames_buffer, uword filenames_buf_size) -> ubyte {
         ; -- fill the provided buffer with the names of the files on the disk (until buffer is full).
         ;    Files in the buffer are separeted by a 0 byte. You can provide an optional pattern to match against.
         ;    After the last filename one additional 0 byte is placed to indicate the end of the list.
@@ -132,10 +120,10 @@ io_error:
         ;    Also sets carry on exit: Carry clear = all files returned, Carry set = directory has more files that didn't fit in the buffer.
         uword buffer_start = filenames_buffer
         ubyte files_found = 0
-        if lf_start_list(pattern_ptr) {
+        if lf_start_list(drivenumber, pattern_ptr) {
             while lf_next_entry() {
                 if list_filetype!="dir" {
-                    filenames_buffer += string.copy(list_filename, filenames_buffer) + 1
+                    filenames_buffer += string.copy(diskio.list_filename, filenames_buffer) + 1
                     files_found++
                     if filenames_buffer - buffer_start > filenames_buf_size-20 {
                         @(filenames_buffer)=0
@@ -154,7 +142,7 @@ io_error:
 
     ; ----- iterative file lister functions (uses io channel 12) -----
 
-    sub lf_start_list(uword pattern_ptr) -> bool {
+    sub lf_start_list(ubyte drivenumber, uword pattern_ptr) -> bool {
         ; -- start an iterative file listing with optional pattern matching.
         ;    note: only a single iteration loop can be active at a time!
         lf_end_list()
@@ -162,20 +150,20 @@ io_error:
         list_skip_disk_name = true
         iteration_in_progress = true
 
-        cbm.SETNAM(1, "$")
-        cbm.SETLFS(12, drivenumber, 0)
-        void cbm.OPEN()          ; open 12,8,0,"$"
+        c64.SETNAM(1, "$")
+        c64.SETLFS(12, drivenumber, 0)
+        void c64.OPEN()          ; open 12,8,0,"$"
         if_cs
             goto io_error
-        void cbm.CHKIN(12)        ; use #12 as input channel
+        void c64.CHKIN(12)        ; use #12 as input channel
         if_cs
             goto io_error
 
         repeat 4 {
-            void cbm.CHRIN()     ; skip the 4 prologue bytes
+            void c64.CHRIN()     ; skip the 4 prologue bytes
         }
 
-        if cbm.READST()==0
+        if c64.READST()==0
             return true
 
 io_error:
@@ -192,26 +180,26 @@ io_error:
             return false
 
         repeat {
-            void cbm.CHKIN(12)        ; use #12 as input channel again
+            void c64.CHKIN(12)        ; use #12 as input channel again
 
             uword nameptr = &list_filename
-            ubyte blocks_lsb = cbm.CHRIN()
-            ubyte blocks_msb = cbm.CHRIN()
+            ubyte blocks_lsb = c64.CHRIN()
+            ubyte blocks_msb = c64.CHRIN()
 
-            if cbm.READST()
+            if c64.READST()
                 goto close_end
 
             list_blocks = mkword(blocks_msb, blocks_lsb)
 
             ; read until the filename starts after the first "
-            while cbm.CHRIN()!='\"'  {
-                if cbm.READST()
+            while c64.CHRIN()!='\"'  {
+                if c64.READST()
                     goto close_end
             }
 
             ; read the filename
             repeat {
-                ubyte char = cbm.CHRIN()
+                ubyte char = c64.CHRIN()
                 if char==0
                     break
                 if char=='\"'
@@ -223,17 +211,17 @@ io_error:
             @(nameptr) = 0
 
             do {
-                cx16.r15L = cbm.CHRIN()
+                cx16.r15L = c64.CHRIN()
             } until cx16.r15L!=' '      ; skip blanks up to 3 chars entry type
             list_filetype[0] = cx16.r15L
-            list_filetype[1] = cbm.CHRIN()
-            list_filetype[2] = cbm.CHRIN()
-            while cbm.CHRIN() {
+            list_filetype[1] = c64.CHRIN()
+            list_filetype[2] = c64.CHRIN()
+            while c64.CHRIN() {
                 ; read the rest of the entry until the end
             }
 
-            void cbm.CHRIN()     ; skip 2 bytes
-            void cbm.CHRIN()
+            void c64.CHRIN()     ; skip 2 bytes
+            void c64.CHRIN()
 
             if not list_skip_disk_name {
                 if not list_pattern
@@ -252,8 +240,8 @@ close_end:
     sub lf_end_list() {
         ; -- end an iterative file listing session (close channels).
         if iteration_in_progress {
-            cbm.CLRCHN()
-            cbm.CLOSE(12)
+            c64.CLRCHN()
+            c64.CLOSE(12)
             iteration_in_progress = false
         }
     }
@@ -261,24 +249,25 @@ close_end:
 
     ; ----- iterative file loader functions (uses io channel 12) -----
 
-    sub f_open(uword filenameptr) -> bool {
+    sub f_open(ubyte drivenumber, uword filenameptr) -> bool {
         ; -- open a file for iterative reading with f_read
         ;    note: only a single iteration loop can be active at a time!
         f_close()
 
-        cbm.SETNAM(string.length(filenameptr), filenameptr)
-        cbm.SETLFS(12, drivenumber, 12)     ; note: has to be 12,x,12 because otherwise f_seek doesn't work
-        void cbm.OPEN()          ; open 12,8,12,"filename"
+        c64.SETNAM(string.length(filenameptr), filenameptr)
+        c64.SETLFS(12, drivenumber, 12)     ; note: has to be 12,x,12 because otherwise f_seek doesn't work
+        last_drivenumber = drivenumber
+        void c64.OPEN()          ; open 12,8,12,"filename"
         if_cc {
-            if cbm.READST()==0 {
+            if c64.READST()==0 {
                 iteration_in_progress = true
-                void cbm.CHKIN(12)          ; use #12 as input channel
+                void c64.CHKIN(12)          ; use #12 as input channel
                 if_cc {
-                    void cbm.CHRIN()        ; read first byte to test for file not found
-                    if not cbm.READST() {
-                        cbm.CLOSE(12)           ; close file because we already consumed first byte
-                        void cbm.OPEN()         ; re-open the file
-                        void cbm.CHKIN(12)
+                    void c64.CHRIN()        ; read first byte to test for file not found
+                    if not c64.READST() {
+                        c64.CLOSE(12)           ; close file because we already consumed first byte
+                        void c64.OPEN()         ; re-open the file
+                        void c64.CHKIN(12)
                         return true
                     }
                 }
@@ -291,6 +280,9 @@ close_end:
     sub f_read(uword bufferpointer, uword num_bytes) -> uword {
         ; -- read from the currently open file, up to the given number of bytes.
         ;    returns the actual number of bytes read.  (checks for End-of-file and error conditions)
+        ;    NOTE: on systems with banked ram (such as Commander X16) this routine DOES NOT
+        ;          automatically load into subsequent banks if it reaches a bank boundary!
+        ;          Consider using cx16diskio.f_read() on X16.
         if not iteration_in_progress or not num_bytes
             return 0
 
@@ -303,14 +295,14 @@ close_end:
             sta  m_in_buffer+2
         }}
         while num_bytes {
-            if cbm.READST() {
+            if c64.READST() {
                 f_close()
-                if cbm.READST() & $40    ; eof?
+                if c64.READST() & $40    ; eof?
                     return list_blocks   ; number of bytes read
                 return 0  ; error.
             }
             %asm {{
-                jsr  cbm.CHRIN
+                jsr  c64.CHRIN
 m_in_buffer     sta  $ffff
                 inc  m_in_buffer+1
                 bne  +
@@ -325,11 +317,12 @@ m_in_buffer     sta  $ffff
 
     sub f_read_all(uword bufferpointer) -> uword {
         ; -- read the full contents of the file, returns number of bytes read.
+        ;    Note: Consider using cx16diskio.f_read_all() on X16!
         if not iteration_in_progress
             return 0
 
         uword total_read = 0
-        while not cbm.READST() {
+        while not c64.READST() {
             cx16.r0 = f_read(bufferpointer, 256)
             total_read += cx16.r0
             bufferpointer += cx16.r0
@@ -347,9 +340,9 @@ m_in_buffer     sta  $ffff
             sta  P8ZP_SCRATCH_W1
             sty  P8ZP_SCRATCH_W1+1
             ldx  #12
-            jsr  cbm.CHKIN              ; use channel 12 again for input
+            jsr  c64.CHKIN              ; use channel 12 again for input
             ldy  #0
-_loop       jsr  cbm.CHRIN
+_loop       jsr  c64.CHRIN
             sta  (P8ZP_SCRATCH_W1),y
             beq  _end
             iny
@@ -364,11 +357,12 @@ _end        rts
         }}
     }
 
+
     sub f_close() {
         ; -- end an iterative file loading session (close channels).
         if iteration_in_progress {
-            cbm.CLRCHN()
-            cbm.CLOSE(12)
+            c64.CLRCHN()
+            c64.CLOSE(12)
             iteration_in_progress = false
         }
     }
@@ -376,16 +370,16 @@ _end        rts
 
     ; ----- iterative file writing functions (uses io channel 13) -----
 
-    sub f_open_w(uword filenameptr) -> bool {
+    sub f_open_w(ubyte drivenumber, uword filenameptr) -> bool {
         ; -- open a file for iterative writing with f_write
         f_close_w()
 
-        cbm.SETNAM(string.length(filenameptr), filenameptr)
-        cbm.SETLFS(13, drivenumber, 1)
-        void cbm.OPEN()             ; open 13,8,1,"filename"
+        c64.SETNAM(string.length(filenameptr), filenameptr)
+        c64.SETLFS(13, drivenumber, 1)
+        void c64.OPEN()             ; open 13,8,1,"filename"
         if_cc {
-            cbm.CHKOUT(13)          ; use #13 as output channel
-            return not cbm.READST()
+            c64.CHKOUT(13)          ; use #13 as output channel
+            return not c64.READST()
         }
         f_close_w()
         return false
@@ -394,39 +388,39 @@ _end        rts
     sub f_write(uword bufferpointer, uword num_bytes) -> bool {
         ; -- write the given number of bytes to the currently open file
         if num_bytes!=0 {
-            cbm.CHKOUT(13)        ; use #13 as output channel again
+            c64.CHKOUT(13)        ; use #13 as output channel again
             repeat num_bytes {
-                cbm.CHROUT(@(bufferpointer))
+                c64.CHROUT(@(bufferpointer))
                 bufferpointer++
             }
-            return not cbm.READST()
+            return not c64.READST()
         }
         return true
     }
 
     sub f_close_w() {
         ; -- end an iterative file writing session (close channels).
-        cbm.CLRCHN()
-        cbm.CLOSE(13)
+        c64.CLRCHN()
+        c64.CLOSE(13)
     }
 
 
     ; ---- other functions ----
 
-    sub status() -> uword {
+    sub status(ubyte drivenumber) -> uword {
         ; -- retrieve the disk drive's current status message
         uword messageptr = &list_filename
-        cbm.SETNAM(0, list_filename)
-        cbm.SETLFS(15, drivenumber, 15)
-        void cbm.OPEN()          ; open 15,8,15
+        c64.SETNAM(0, list_filename)
+        c64.SETLFS(15, drivenumber, 15)
+        void c64.OPEN()          ; open 15,8,15
         if_cs
             goto io_error
-        void cbm.CHKIN(15)        ; use #15 as input channel
+        void c64.CHKIN(15)        ; use #15 as input channel
         if_cs
             goto io_error
 
-        while not cbm.READST() {
-            cx16.r5L = cbm.CHRIN()
+        while not c64.READST() {
+            cx16.r5L = c64.CHRIN()
             if cx16.r5L=='\r' or cx16.r5L=='\n'
                 break
             @(messageptr) = cx16.r5L
@@ -435,8 +429,8 @@ _end        rts
         @(messageptr) = 0
 
 done:
-        cbm.CLRCHN()        ; restore default i/o devices
-        cbm.CLOSE(15)
+        c64.CLRCHN()        ; restore default i/o devices
+        c64.CLOSE(15)
         return list_filename
 
 io_error:
@@ -444,9 +438,9 @@ io_error:
         goto done
     }
 
-    sub save(uword filenameptr, uword address, uword size) -> bool {
-        cbm.SETNAM(string.length(filenameptr), filenameptr)
-        cbm.SETLFS(1, drivenumber, 0)
+    sub save(ubyte drivenumber, uword filenameptr, uword address, uword size) -> bool {
+        c64.SETNAM(string.length(filenameptr), filenameptr)
+        c64.SETLFS(1, drivenumber, 0)
         uword @shared end_address = address + size
         cx16.r0L = 0
 
@@ -459,17 +453,17 @@ io_error:
             lda  #<P8ZP_SCRATCH_W1
             ldx  end_address
             ldy  end_address+1
-            jsr  cbm.SAVE
+            jsr  c64.SAVE
             php
             ldx  P8ZP_SCRATCH_REG
             plp
         }}
 
         if_cc
-            cx16.r0L = cbm.READST()==0
+            cx16.r0L = c64.READST()==0
 
-        cbm.CLRCHN()
-        cbm.CLOSE(1)
+        c64.CLRCHN()
+        c64.CLOSE(1)
 
         return cx16.r0L
     }
@@ -480,77 +474,99 @@ io_error:
     ; If you specify a custom address_override, the first 2 bytes in the file are ignored
     ; and the rest is loaded at the given location in memory.
     ; Returns the end load address+1 if successful or 0 if a load error occurred.
-    sub load(uword filenameptr, uword address_override) -> uword {
-        cbm.SETNAM(string.length(filenameptr), filenameptr)
-        ubyte secondary = 1
-        cx16.r1 = 0
-        if address_override
-            secondary = 0
-        cbm.SETLFS(1, drivenumber, secondary)
-        %asm {{
-            stx  P8ZP_SCRATCH_REG
-            lda  #0
-            ldx  address_override
-            ldy  address_override+1
-            jsr  cbm.LOAD
-            bcs  +
-            stx  cx16.r1
-            sty  cx16.r1+1
-+           ldx  P8ZP_SCRATCH_REG
-        }}
-
-        cbm.CLRCHN()
-        cbm.CLOSE(1)
-        return cx16.r1
+    ; NOTE: when the load is larger than 64Kb and/or spans multiple RAM banks
+    ;       (which is possible on the Commander X16), the returned size is not correct,
+    ;       because it doesn't take the number of ram banks into account.
+    ;       Also consider using cx16diskio.load() instead  on the Commander X16.
+    sub load(ubyte drivenumber, uword filenameptr, uword address_override) -> uword {
+        return internal_load_routine(drivenumber, filenameptr, address_override, false)
     }
 
-    ; Identical to load(), but DOES INCLUDE the first 2 bytes in the file.
-    ; No program header is assumed in the file. Everything is loaded.
-    ; See comments on load() for more details.
-    sub load_raw(uword filenameptr, uword address) -> uword {
-        ; read the 2 header bytes separately to skip them
-        if not f_open(filenameptr)
+    ; Use kernal LOAD routine to load the given file in memory.
+    ; INCLUDING the first 2 bytes in the file: no program header is assumed in the file.
+    ; This is different from Basic's LOAD instruction which always skips the first two bytes.
+    ; The load address is mandatory.
+    ; Returns the end load address+1 if successful or 0 if a load error occurred.
+    ; NOTE: when the load is larger than 64Kb and/or spans multiple RAM banks
+    ;       (which is possible on the Commander X16), the returned size is not correct,
+    ;       because it doesn't take the number of ram banks into account.
+    ;       Also consider using cx16diskio.load_raw() instead on the Commander X16.
+    sub load_raw(ubyte drivenumber, uword filenameptr, uword address) -> uword {
+        if sys.target==16   ; are we on commander X16?
+            return internal_load_routine(drivenumber, filenameptr, address, true)
+        ; fallback to reading the 2 header bytes separately
+        if not f_open(drivenumber, filenameptr)
             return 0
         cx16.r1 = f_read(address, 2)
         f_close()
         if cx16.r1!=2
             return 0
         address += 2
-        return load(filenameptr, address)
+        return load(drivenumber, filenameptr, address)
     }
 
-    sub delete(uword filenameptr) {
+
+    ; Internal routine, only to be used on Commander X16 platform if headerless=true,
+    ; because this routine uses kernal support for that to load headerless files.
+    ; On C64 it will always be called with headerless=false.
+    sub internal_load_routine(ubyte drivenumber, uword filenameptr, uword address_override, bool headerless) -> uword {
+        c64.SETNAM(string.length(filenameptr), filenameptr)
+        ubyte secondary = 1
+        cx16.r1 = 0
+        if address_override
+            secondary = 0
+        if headerless
+            secondary |= %00000010  ; activate cx16 kernal headerless load support
+        c64.SETLFS(1, drivenumber, secondary)
+        %asm {{
+            stx  P8ZP_SCRATCH_REG
+            lda  #0
+            ldx  address_override
+            ldy  address_override+1
+            jsr  c64.LOAD
+            bcs  +
+            stx  cx16.r1
+            sty  cx16.r1+1
++           ldx  P8ZP_SCRATCH_REG
+        }}
+
+        c64.CLRCHN()
+        c64.CLOSE(1)
+        return cx16.r1
+    }
+
+    sub delete(ubyte drivenumber, uword filenameptr) {
         ; -- delete a file on the drive
         list_filename[0] = 's'
         list_filename[1] = ':'
         ubyte flen = string.copy(filenameptr, &list_filename+2)
-        cbm.SETNAM(flen+2, list_filename)
-        cbm.SETLFS(1, drivenumber, 15)
-        void cbm.OPEN()
-        cbm.CLRCHN()
-        cbm.CLOSE(1)
+        c64.SETNAM(flen+2, list_filename)
+        c64.SETLFS(1, drivenumber, 15)
+        void c64.OPEN()
+        c64.CLRCHN()
+        c64.CLOSE(1)
     }
 
-    sub rename(uword oldfileptr, uword newfileptr) {
+    sub rename(ubyte drivenumber, uword oldfileptr, uword newfileptr) {
         ; -- rename a file on the drive
         list_filename[0] = 'r'
         list_filename[1] = ':'
         ubyte flen_new = string.copy(newfileptr, &list_filename+2)
         list_filename[flen_new+2] = '='
         ubyte flen_old = string.copy(oldfileptr, &list_filename+3+flen_new)
-        cbm.SETNAM(3+flen_new+flen_old, list_filename)
-        cbm.SETLFS(1, drivenumber, 15)
-        void cbm.OPEN()
-        cbm.CLRCHN()
-        cbm.CLOSE(1)
+        c64.SETNAM(3+flen_new+flen_old, list_filename)
+        c64.SETLFS(1, drivenumber, 15)
+        void c64.OPEN()
+        c64.CLRCHN()
+        c64.CLOSE(1)
     }
 
-    sub send_command(uword commandptr) {
+    sub send_command(ubyte drivenumber, uword commandptr) {
         ; -- send a dos command to the drive
-        cbm.SETNAM(string.length(commandptr), commandptr)
-        cbm.SETLFS(15, drivenumber, 15)
-        void cbm.OPEN()
-        cbm.CLRCHN()
-        cbm.CLOSE(15)
+        c64.SETNAM(string.length(commandptr), commandptr)
+        c64.SETLFS(15, drivenumber, 15)
+        void c64.OPEN()
+        c64.CLRCHN()
+        c64.CLOSE(15)
     }
 }

compiler/res/prog8lib/floats_functions.p8

@@ -1,6 +1,6 @@
 floats {
     ; the floating point functions shared across compiler targets
-    %option merge, no_symbol_prefixing
+    %option merge
 
 sub print_f(float value) {
 	; ---- prints the floating point value (without a newline).
@@ -15,7 +15,7 @@ sub print_f(float value) {
 		ldy  #0
 -		lda  (P8ZP_SCRATCH_W1),y
 		beq  +
-		jsr  cbm.CHROUT
+		jsr  c64.CHROUT
 		iny
 		bne  -
 +		ldx  floats_store_reg
@@ -39,6 +39,18 @@ sub pow(float value, float power) -> float {
     }}
 }
 
+sub fabs(float value) -> float {
+    %asm {{
+        stx  P8ZP_SCRATCH_REG
+        lda  #<value
+        ldy  #>value
+        jsr  MOVFM
+        jsr  ABS
+        ldx  P8ZP_SCRATCH_REG
+        rts
+    }}
+}
+
 sub sin(float angle) -> float {
     %asm {{
         lda  #<angle
@@ -116,6 +128,18 @@ sub log2(float value) -> float {
     }}
 }
 
+sub sqrt(float value) -> float {
+    %asm {{
+        lda  #<value
+        ldy  #>value
+        jsr  MOVFM
+        stx  P8ZP_SCRATCH_REG
+        jsr  SQR
+        ldx  P8ZP_SCRATCH_REG
+        rts
+    }}
+}
+
 sub rad(float angle) -> float {
     ; -- convert degrees to radians (d * pi / 180)
     %asm {{
@@ -213,27 +237,4 @@ sub rndseedf(float seed) {
     }}
 }
 
-
-sub minf(float f1, float f2) -> float {
-    if f1<f2
-        return f1
-    return f2
-}
-
-
-sub maxf(float f1, float f2) -> float {
-    if f1>f2
-        return f1
-    return f2
-}
-
-
-sub clampf(float value, float minimum, float maximum) -> float {
-    if value>maximum
-      value=maximum
-    if value>minimum
-      return value
-    return minimum
-}
-
 }

compiler/res/prog8lib/math.asm

@@ -51,7 +51,8 @@ multiply_bytes_into_word	.proc
 multiply_words	.proc
 	; -- multiply two 16-bit words into a 32-bit result  (signed and unsigned)
 	;      input: A/Y = first 16-bit number, P8ZP_SCRATCH_W1 in ZP = second 16-bit number
-	;      output: multiply_words.result  4-bytes/32-bits product, LSB order (low-to-high)  low 16 bits also in AY.
+	;      output: multiply_words.result  4-bytes/32-bits product, LSB order (low-to-high)
+	;      clobbers: A
 
 		sta  P8ZP_SCRATCH_W2
 		sty  P8ZP_SCRATCH_W2+1
@@ -78,8 +79,6 @@ mult16		lda  #0
 		dex
 		bne  -
 		ldx  P8ZP_SCRATCH_REG
-		lda  result
-		ldy  result+1
 		rts
 
 result		.byte  0,0,0,0

compiler/res/prog8lib/math.p8

@@ -1,8 +1,6 @@
 ; Internal Math library routines - always included by the compiler
 
 math {
-    %option no_symbol_prefixing
-
 	%asminclude "library:math.asm"
 
     asmsub sin8u(ubyte angle @A) clobbers(Y) -> ubyte @A {
@@ -97,296 +95,4 @@ _sinecosR8	.char  trunc(127.0 * sin(range(180+45) * rad(360.0/180.0)))
             rts
         }}
     }
-
-
-sub direction_sc(byte x1, byte y1, byte x2, byte y2) -> ubyte {
-    ; From a pair of signed coordinates around the origin, calculate discrete direction between 0 and 23 into A.
-    cx16.r0L = 3        ; quadrant
-    cx16.r1sL = x2-x1   ; xdelta
-    if_neg {
-        cx16.r0L--
-        cx16.r1sL = -cx16.r1sL
-    }
-    cx16.r2sL = y2-y1   ; ydelta
-    if_neg {
-        cx16.r0L-=2
-        cx16.r2sL = -cx16.r2sL
-    }
-    return direction_qd(cx16.r0L, cx16.r1L, cx16.r2L)
-}
-
-sub direction(ubyte x1, ubyte y1, ubyte x2, ubyte y2) -> ubyte {
-    ; From a pair of positive coordinates, calculate discrete direction between 0 and 23 into A.
-    cx16.r0L = 3        ; quadrant
-    if x2>=x1 {
-        cx16.r1L = x2-x1
-    } else {
-        cx16.r1L = x1-x2
-        cx16.r0L--
-    }
-    if y2>=y1 {
-        cx16.r2L = y2-y1
-    } else {
-        cx16.r2L = y1-y2
-        cx16.r0L -= 2
-    }
-    return direction_qd(cx16.r0L, cx16.r1L, cx16.r2L)
-}
-
-asmsub direction_qd(ubyte quadrant @A, ubyte xdelta @X, ubyte ydelta @Y) -> ubyte @A {
-    ;Arctan  https://github.com/dustmop/arctan24
-    ; From a pair of X/Y deltas (both >=0), and quadrant 0-3, calculate discrete direction between 0 and 23 into A.
-    ;  .reg:a @in  quadrant Number 0 to 3.
-    ;  .reg:x @in  x_delta Delta for x direction.
-    ;  .reg:y @in  y_delta Delta for y direction.
-    ; Returns A as the direction (0-23).
-
-    %asm {{
-x_delta = cx16.r0L
-y_delta = cx16.r1L
-quadrant = cx16.r2L
-half_value = cx16.r3L
-region_number = cx16.r4L
-small = cx16.r5L
-large = cx16.r5H
-
-  sta quadrant
-  sty y_delta
-  stx x_delta
-  cpx y_delta
-  bcs _XGreaterOrEqualY
-
-_XLessY:
-  lda #16
-  sta region_number
-  stx small
-  sty large
-  bne _DetermineRegion
-
-_XGreaterOrEqualY:
-  lda #0
-  sta region_number
-  stx large
-  sty small
-
-_DetermineRegion:
-  ; set A = small * 2.5
-  lda small
-  lsr a
-  sta half_value
-  lda small
-  asl a
-  bcs _SmallerQuotient
-  clc
-  adc half_value
-  bcs _SmallerQuotient
-  cmp large
-  bcc _LargerQuotient
-
-; S * 2.5 > L
-_SmallerQuotient:
-  ; set A = S * 1.25
-  lsr half_value
-  lda small
-  clc
-  adc half_value
-  cmp large
-  bcc _Region1 ; if S * 1.25 < L then goto Region1 (L / S > 1.25)
-  bcs _Region0 ;                                   (L / S < 1.25)
-
-; S * 2.5 < L
-_LargerQuotient:
-  ; set A = S * 7.5
-  lda small
-  asl a
-  asl a
-  asl a
-  bcs _Region2
-  sec
-  sbc half_value
-  cmp large
-  bcc _Region3 ; if S * 7.5 < L then goto Region3 (L / S > 7.5)
-  jmp _Region2 ;                                  (L / S < 7.5)
-
-_Region0:
-  ; L / S < 1.25. d=3,9,15,21
-  jmp _LookupResult
-
-_Region1:
-  ; 1.25 < L / S < 2.5. d=2,4,8,10,14,16,20,22
-  lda region_number
-  clc
-  adc #4
-  sta region_number
-  bpl _LookupResult
-
-_Region2:
-  ; 2.5 < L / S < 7.5. d=1,5,7,11,13,17,19,23
-  lda region_number
-  clc
-  adc #8
-  sta region_number
-  bpl _LookupResult
-
-_Region3:
-  ; 7.5 < L / S. d=0,6,12,18
-  lda region_number
-  clc
-  adc #12
-  sta region_number
-
-_LookupResult:
-  lda quadrant
-  clc
-  adc region_number
-  tax
-  lda _quadrant_region_to_direction,x
-  rts
-
-_quadrant_region_to_direction:
-  .byte  9, 3,15,21
-  .byte 10, 2,14,22
-  .byte 11, 1,13,23
-  .byte 12, 0,12, 0
-  .byte  9, 3,15,21
-  .byte  8, 4,16,20
-  .byte  7, 5,17,19
-  .byte  6, 6,18,18
-
-    }}
-}
-
-asmsub atan2(ubyte x1 @R0, ubyte y1 @R1, ubyte x2 @R2, ubyte y2 @R3) -> ubyte @A {
-    ;; Calculate the angle, in a 256-degree circle, between two points into A.
-    ;; The points (x1, y1) and (x2, y2) have to use *unsigned coordinates only* from the positive quadrant in the carthesian plane!
-    ;; https://www.codebase64.org/doku.php?id=base:8bit_atan2_8-bit_angle
-    ;; This uses 2 large lookup tables so uses a lot of memory but is super fast.
-
-    %asm {{
-
-x1 = cx16.r0L
-y1 = cx16.r1L
-x2 = cx16.r2L
-y2 = cx16.r3L
-octant = cx16.r4L			;; temporary zeropage variable
-
-		lda x1
-		sec
-		sbc x2
-		bcs *+4
-		eor #$ff
-		tax
-		rol octant
-
-		lda y1
-		sec
-		sbc y2
-		bcs *+4
-		eor #$ff
-		tay
-		rol octant
-
-		lda log2_tab,x
-		sec
-		sbc log2_tab,y
-		bcc *+4
-		eor #$ff
-		tax
-
-		lda octant
-		rol a
-		and #%111
-		tay
-
-		lda atan_tab,x
-		eor octant_adjust,y
-		rts
-
-octant_adjust
-		.byte %00111111		;; x+,y+,|x|>|y|
-		.byte %00000000		;; x+,y+,|x|<|y|
-		.byte %11000000		;; x+,y-,|x|>|y|
-		.byte %11111111		;; x+,y-,|x|<|y|
-		.byte %01000000		;; x-,y+,|x|>|y|
-		.byte %01111111		;; x-,y+,|x|<|y|
-		.byte %10111111		;; x-,y-,|x|>|y|
-		.byte %10000000		;; x-,y-,|x|<|y|
-
-
-		;;;;;;;; atan(2^(x/32))*128/pi ;;;;;;;;
-
-atan_tab
-		.byte $00,$00,$00,$00,$00,$00,$00,$00
-		.byte $00,$00,$00,$00,$00,$00,$00,$00
-		.byte $00,$00,$00,$00,$00,$00,$00,$00
-		.byte $00,$00,$00,$00,$00,$00,$00,$00
-		.byte $00,$00,$00,$00,$00,$00,$00,$00
-		.byte $00,$00,$00,$00,$00,$00,$00,$00
-		.byte $00,$00,$00,$00,$00,$00,$00,$00
-		.byte $00,$00,$00,$00,$00,$00,$00,$00
-		.byte $00,$00,$00,$00,$00,$00,$00,$00
-		.byte $00,$00,$00,$00,$00,$00,$00,$00
-		.byte $00,$00,$00,$00,$00,$01,$01,$01
-		.byte $01,$01,$01,$01,$01,$01,$01,$01
-		.byte $01,$01,$01,$01,$01,$01,$01,$01
-		.byte $01,$01,$01,$01,$01,$01,$01,$01
-		.byte $01,$01,$01,$01,$01,$02,$02,$02
-		.byte $02,$02,$02,$02,$02,$02,$02,$02
-		.byte $02,$02,$02,$02,$02,$02,$02,$02
-		.byte $03,$03,$03,$03,$03,$03,$03,$03
-		.byte $03,$03,$03,$03,$03,$04,$04,$04
-		.byte $04,$04,$04,$04,$04,$04,$04,$04
-		.byte $05,$05,$05,$05,$05,$05,$05,$05
-		.byte $06,$06,$06,$06,$06,$06,$06,$06
-		.byte $07,$07,$07,$07,$07,$07,$08,$08
-		.byte $08,$08,$08,$08,$09,$09,$09,$09
-		.byte $09,$0a,$0a,$0a,$0a,$0b,$0b,$0b
-		.byte $0b,$0c,$0c,$0c,$0c,$0d,$0d,$0d
-		.byte $0d,$0e,$0e,$0e,$0e,$0f,$0f,$0f
-		.byte $10,$10,$10,$11,$11,$11,$12,$12
-		.byte $12,$13,$13,$13,$14,$14,$15,$15
-		.byte $15,$16,$16,$17,$17,$17,$18,$18
-		.byte $19,$19,$19,$1a,$1a,$1b,$1b,$1c
-		.byte $1c,$1c,$1d,$1d,$1e,$1e,$1f,$1f
-
-
-		;;;;;;;; log2(x)*32 ;;;;;;;;
-
-log2_tab
-		.byte $00,$00,$20,$32,$40,$4a,$52,$59
-		.byte $60,$65,$6a,$6e,$72,$76,$79,$7d
-		.byte $80,$82,$85,$87,$8a,$8c,$8e,$90
-		.byte $92,$94,$96,$98,$99,$9b,$9d,$9e
-		.byte $a0,$a1,$a2,$a4,$a5,$a6,$a7,$a9
-		.byte $aa,$ab,$ac,$ad,$ae,$af,$b0,$b1
-		.byte $b2,$b3,$b4,$b5,$b6,$b7,$b8,$b9
-		.byte $b9,$ba,$bb,$bc,$bd,$bd,$be,$bf
-		.byte $c0,$c0,$c1,$c2,$c2,$c3,$c4,$c4
-		.byte $c5,$c6,$c6,$c7,$c7,$c8,$c9,$c9
-		.byte $ca,$ca,$cb,$cc,$cc,$cd,$cd,$ce
-		.byte $ce,$cf,$cf,$d0,$d0,$d1,$d1,$d2
-		.byte $d2,$d3,$d3,$d4,$d4,$d5,$d5,$d5
-		.byte $d6,$d6,$d7,$d7,$d8,$d8,$d9,$d9
-		.byte $d9,$da,$da,$db,$db,$db,$dc,$dc
-		.byte $dd,$dd,$dd,$de,$de,$de,$df,$df
-		.byte $df,$e0,$e0,$e1,$e1,$e1,$e2,$e2
-		.byte $e2,$e3,$e3,$e3,$e4,$e4,$e4,$e5
-		.byte $e5,$e5,$e6,$e6,$e6,$e7,$e7,$e7
-		.byte $e7,$e8,$e8,$e8,$e9,$e9,$e9,$ea
-		.byte $ea,$ea,$ea,$eb,$eb,$eb,$ec,$ec
-		.byte $ec,$ec,$ed,$ed,$ed,$ed,$ee,$ee
-		.byte $ee,$ee,$ef,$ef,$ef,$ef,$f0,$f0
-		.byte $f0,$f1,$f1,$f1,$f1,$f1,$f2,$f2
-		.byte $f2,$f2,$f3,$f3,$f3,$f3,$f4,$f4
-		.byte $f4,$f4,$f5,$f5,$f5,$f5,$f5,$f6
-		.byte $f6,$f6,$f6,$f7,$f7,$f7,$f7,$f7
-		.byte $f8,$f8,$f8,$f8,$f9,$f9,$f9,$f9
-		.byte $f9,$fa,$fa,$fa,$fa,$fa,$fb,$fb
-		.byte $fb,$fb,$fb,$fc,$fc,$fc,$fc,$fc
-		.byte $fd,$fd,$fd,$fd,$fd,$fd,$fe,$fe
-		.byte $fe,$fe,$fe,$ff,$ff,$ff,$ff,$ff
-
-    }}
-}
-
 }

compiler/res/prog8lib/prog8_funcs.asm

@@ -86,15 +86,16 @@ func_all_w_stack	.proc
 
 abs_b_stack	.proc
 	; -- push abs(A) on stack (as unsigned word)
-		jsr  abs_b_into_A
+		jsr  abs_b_into_AY
 		sta  P8ESTACK_LO,x
 		stz  P8ESTACK_HI,x
 		dex
 		rts
 		.pend
 
-abs_b_into_A	.proc
-	; -- A = abs(A)
+abs_b_into_AY	.proc
+	; -- AY = abs(A)  (abs always returns unsigned word)
+		ldy  #0
 		cmp  #0
 		bmi  +
 		rts
@@ -555,111 +556,3 @@ func_pokew   .proc
 	sta  (P8ZP_SCRATCH_W1),y
 	rts
 	.pend
-
-
-func_clamp_byte .proc
-	; signed value in A, result in A
-	; minimum in P8ZP_SCRATCH_W1
-	; maximum in P8ZP_SCRATCH_W1+1
-	tay
-	sec
-	sbc  P8ZP_SCRATCH_W1+1
-	bvc  +
-	eor  #$80
-+       bmi  +
-	lda  P8ZP_SCRATCH_W1+1
-	tay
-	jmp  ++
-+       tya
-+	sec
-	sbc  P8ZP_SCRATCH_W1
-	bvc  +
-	eor  #$80
-+       bmi  +
-	tya
-	rts
-+       lda  P8ZP_SCRATCH_W1
-	rts
-	.pend
-
-
-func_clamp_ubyte .proc
-	; value in A, result in A
-	; minimum in P8ZP_SCRATCH_W1
-	; maximum in P8ZP_SCRATCH_W1+1
-	cmp  P8ZP_SCRATCH_W1+1
-	bcc  +
-	lda  P8ZP_SCRATCH_W1+1
-+       cmp  P8ZP_SCRATCH_W1
-	bcc  +
-	rts
-+       lda  P8ZP_SCRATCH_W1
-	rts
-	.pend
-
-func_clamp_word .proc
-	; signed value in AY, result in AY
-	; minimum in P8ZP_SCRATCH_W1
-	; maximum in P8ZP_SCRATCH_W2
-	sta  P8ZP_SCRATCH_B1
-	sty  P8ZP_SCRATCH_REG
-	ldy  P8ZP_SCRATCH_W2+1
-	lda  P8ZP_SCRATCH_W2
-	cmp  P8ZP_SCRATCH_B1
-	tya
-	sbc  P8ZP_SCRATCH_REG
-	bvc  +
-	eor  #$80
-+       bpl  +
-	lda  P8ZP_SCRATCH_W2
-	ldy  P8ZP_SCRATCH_W2+1
-	sta  P8ZP_SCRATCH_B1
-	sty  P8ZP_SCRATCH_REG
-+	ldy  P8ZP_SCRATCH_W1+1
-	lda  P8ZP_SCRATCH_W1
-	cmp  P8ZP_SCRATCH_B1
-	tya
-	sbc  P8ZP_SCRATCH_REG
-	bvc  +
-	eor  #$80
-+       bpl  +
-	ldy  P8ZP_SCRATCH_REG
-	lda  P8ZP_SCRATCH_B1
-	rts
-+	ldy  P8ZP_SCRATCH_W1+1
-	lda  P8ZP_SCRATCH_W1
-	rts
-	.pend
-
-func_clamp_uword .proc
-	; value in AY, result in AY
-	; minimum in P8ZP_SCRATCH_W1
-	; maximum in P8ZP_SCRATCH_W2
-	sta  P8ZP_SCRATCH_B1
-	sty  P8ZP_SCRATCH_REG
-	cpy  P8ZP_SCRATCH_W2+1
-	bcc  ++
-	bne  +
-	cmp  P8ZP_SCRATCH_W2
-	bcc  ++
-+       beq  +
-	lda  P8ZP_SCRATCH_W2
-	ldy  P8ZP_SCRATCH_W2+1
-	sta  P8ZP_SCRATCH_B1
-	sty  P8ZP_SCRATCH_REG
-+	ldy  P8ZP_SCRATCH_REG
-	lda  P8ZP_SCRATCH_B1
-	cpy  P8ZP_SCRATCH_W1+1
-	bcc  ++
-	bne  +
-	cmp  P8ZP_SCRATCH_W1
-	bcc  ++
-+       beq  +
-	ldy  P8ZP_SCRATCH_REG
-	lda  P8ZP_SCRATCH_B1
-	rts
-+	ldy  P8ZP_SCRATCH_W1+1
-	lda  P8ZP_SCRATCH_W1
-	rts
-
-	.pend

compiler/res/prog8lib/prog8_lib.asm

@@ -167,8 +167,9 @@ mul_word	.proc
 		lda  P8ESTACK_LO+1,x
 		ldy  P8ESTACK_HI+1,x
 		jsr  math.multiply_words
+		lda  math.multiply_words.result
 		sta  P8ESTACK_LO+1,x
-		tya
+		lda  math.multiply_words.result+1
 		sta  P8ESTACK_HI+1,x
 		rts
 		.pend

compiler/res/prog8lib/prog8_lib.p8

@@ -1,8 +1,6 @@
 ; Internal library routines - always included by the compiler
 
 prog8_lib {
-    %option no_symbol_prefixing
-
 	%asminclude "library:prog8_lib.asm"
 	%asminclude "library:prog8_funcs.asm"
 }

compiler/res/prog8lib/string.p8

@@ -1,7 +1,6 @@
 ; 0-terminated string manipulation routines.
 
 string {
-    %option no_symbol_prefixing
 
     asmsub length(uword string @AY) clobbers(A) -> ubyte @Y {
         ; Returns the number of bytes in the string.
@@ -128,7 +127,7 @@ _startloop	dey
         }}
     }
 
-    asmsub find(uword string @R0, ubyte character @A) -> ubyte @A, bool @Pc {
+    asmsub find(uword string @R0, ubyte character @A) -> ubyte @A, ubyte @Pc {
         ; Locates the first position of the given character in the string,
         ; returns Carry set if found + index in A, or A=0 + Carry clear if not found.
         %asm {{

compiler/res/prog8lib/test_stack.p8

@@ -3,7 +3,6 @@
 %import textio
 
 test_stack {
-    %option no_symbol_prefixing
 
     asmsub test() {
         %asm {{

compiler/res/prog8lib/virtual/conv.p8

@@ -106,21 +106,19 @@ sub  str_uwhex  (uword value) {
 
 sub  str_uw0  (uword value) {
     ; ---- convert the uword in A/Y in decimal string form, with left padding 0s (5 positions total)
-    uword value2 = value/10
-    ubyte digits = value-value2*10 as ubyte
-    uword value3 = value2/10
-    ubyte tens = value2-value3*10 as ubyte
-    uword value4 = value3/10
-    ubyte hundreds = value3-value4*10 as ubyte
-    uword value5 = value4/10
-    ubyte thousands = value4-value5*10 as ubyte
-    uword value6 = value5/10
-    ubyte tenthousands = value5-value6*10 as ubyte
+    ubyte tenthousands = (value / 10000) as ubyte
+    value -= 10000*tenthousands
+    ubyte thousands = (value / 1000) as ubyte
+    value -= 1000*thousands
+    ubyte hundreds = (value / 100) as ubyte
+    value -= 100 as uword * hundreds
+    ubyte tens = (value / 10) as ubyte
+    value -= 10*tens
     string_out[0] = tenthousands+'0'
     string_out[1] = thousands+'0'
     string_out[2] = hundreds+'0'
     string_out[3] = tens+'0'
-    string_out[4] = digits+'0'
+    string_out[4] = value as ubyte + '0'
     string_out[5] = 0
 }
 
@@ -141,16 +139,14 @@ sub  str_w  (word value)  {
 }
 
 sub internal_str_uw(uword value, uword out_ptr) {
-    uword value2 = value/10
-    ubyte digits = value-value2*10 as ubyte
-    uword value3 = value2/10
-    ubyte tens = value2-value3*10 as ubyte
-    uword value4 = value3/10
-    ubyte hundreds = value3-value4*10 as ubyte
-    uword value5 = value4/10
-    ubyte thousands = value4-value5*10 as ubyte
-    uword value6 = value5/10
-    ubyte tenthousands = value5-value6*10 as ubyte
+    ubyte tenthousands = (value / 10000) as ubyte
+    value -= 10000*tenthousands
+    ubyte thousands = (value / 1000) as ubyte
+    value -= 1000*thousands
+    ubyte hundreds = (value / 100) as ubyte
+    value -= 100 as uword * hundreds
+    ubyte tens = (value / 10) as ubyte
+    value -= 10*tens
     if tenthousands
         goto output_tenthousands
     if thousands
@@ -173,7 +169,7 @@ output_tens:
     @(out_ptr) = tens+'0'
     out_ptr++
 output_ones:
-    @(out_ptr) = digits+'0'
+    @(out_ptr) = value as ubyte + '0'
     out_ptr++
     @(out_ptr) = 0
 }

compiler/res/prog8lib/virtual/diskio.p8

@@ -1 +0,0 @@
-; there is no diskio yet for the VM target.

compiler/res/prog8lib/virtual/floats.p8

@@ -25,6 +25,14 @@ sub pow(float value, float power) -> float {
     }}
 }
 
+sub fabs(float value) -> float {
+    %ir {{
+        loadm.f fr0,floats.fabs.value
+        fabs.f fr0,fr0
+        returnr.f fr0
+    }}
+}
+
 sub sin(float angle) -> float {
     %ir {{
         loadm.f fr0,floats.sin.angle
@@ -73,6 +81,14 @@ sub log2(float value) -> float {
     }}
 }
 
+sub sqrt(float value) -> float {
+    %ir {{
+        loadm.f fr0,floats.sqrt.value
+        sqrt.f fr0,fr0
+        returnr.f fr0
+    }}
+}
+
 sub rad(float angle) -> float {
     ; -- convert degrees to radians (d * pi / 180)
     return angle * PI / 180.0
@@ -123,27 +139,4 @@ sub rndseedf(float seed) {
     }}
 }
 
-
-sub minf(float f1, float f2) -> float {
-    if f1<f2
-        return f1
-    return f2
-}
-
-
-sub maxf(float f1, float f2) -> float {
-    if f1>f2
-        return f1
-    return f2
-}
-
-
-sub clampf(float value, float minimum, float maximum) -> float {
-    if value<minimum
-        value=minimum
-    if value<maximum
-        return value
-    return maximum
-}
-
 }

compiler/res/prog8lib/virtual/math.p8

@@ -182,61 +182,4 @@ math {
             return
         }}
     }
-
-
-sub direction(ubyte x1, ubyte y1, ubyte x2, ubyte y2) -> ubyte {
-    ; From a pair of positive coordinates, calculate discrete direction between 0 and 23 into A.
-    ; This adjusts the atan() result  so that the direction N is centered on the angle=N instead of having it as a boundary
-    ubyte angle = atan2(x1, y1, x2, y2) - 256/48
-    return 23-lsb(mkword(angle,0) / 2730)
-}
-
-sub direction_sc(byte x1, byte y1, byte x2, byte y2) -> ubyte {
-    ; From a pair of signed coordinates around the origin, calculate discrete direction between 0 and 23 into A.
-    ; shift the points into the positive quadrant
-    ubyte px1
-    ubyte py1
-    ubyte px2
-    ubyte py2
-    if x1<0 or x2<0 {
-        px1 = x1 as ubyte + 128
-        px2 = x2 as ubyte + 128
-    } else {
-        px1 = x1 as ubyte
-        px2 = x2 as ubyte
-    }
-    if y1<0 or y2<0 {
-        py1 = y1 as ubyte + 128
-        py2 = y2 as ubyte + 128
-    } else {
-        py1 = y1 as ubyte
-        py2 = y2 as ubyte
-    }
-
-    return direction(px1, py1, px2, py2)
-}
-
-sub direction_qd(ubyte quadrant, ubyte xdelta, ubyte ydelta) -> ubyte {
-    ; From a pair of X/Y deltas (both >=0), and quadrant 0-3, calculate discrete direction between 0 and 23.
-    when quadrant {
-        3 -> return direction(0, 0, xdelta, ydelta)
-        2 -> return direction(xdelta, 0, 0, ydelta)
-        1 -> return direction(0, ydelta, xdelta, 0)
-        else -> return direction(xdelta, ydelta, 0, 0)
-    }
-}
-
-sub atan2(ubyte x1, ubyte y1, ubyte x2, ubyte y2) -> ubyte {
-    ;; Calculate the angle, in a 256-degree circle, between two points into A.
-    ;; The points (x1, y1) and (x2, y2) have to use *unsigned coordinates only* from the positive quadrant in the carthesian plane!
-    %ir {{
-        loadm.b r65532,math.atan2.x1
-        loadm.b r65533,math.atan2.y1
-        loadm.b r65534,math.atan2.x2
-        loadm.b r65535,math.atan2.y2
-        syscall 44 (r65532.b, r65533.b, r65534.b, r65535.b): r0.b
-        returnr.b r0
-    }}
-}
-
 }

compiler/res/prog8lib/virtual/syslib.p8

@@ -218,43 +218,4 @@ cx16 {
     &byte r13sH = $ff1d
     &byte r14sH = $ff1f
     &byte r15sH = $ff21
-
-    sub save_virtual_registers() {
-        uword[32] storage
-        storage[0] = r0
-        storage[1] = r1
-        storage[2] = r2
-        storage[3] = r3
-        storage[4] = r4
-        storage[5] = r5
-        storage[6] = r6
-        storage[7] = r7
-        storage[8] = r8
-        storage[9] = r9
-        storage[10] = r10
-        storage[11] = r11
-        storage[12] = r12
-        storage[13] = r13
-        storage[14] = r14
-        storage[15] = r15
-    }
-
-    sub restore_virtual_registers() {
-        r0 = cx16.save_virtual_registers.storage[0]
-        r1 = cx16.save_virtual_registers.storage[1]
-        r2 = cx16.save_virtual_registers.storage[2]
-        r3 = cx16.save_virtual_registers.storage[3]
-        r4 = cx16.save_virtual_registers.storage[4]
-        r5 = cx16.save_virtual_registers.storage[5]
-        r6 = cx16.save_virtual_registers.storage[6]
-        r7 = cx16.save_virtual_registers.storage[7]
-        r8 = cx16.save_virtual_registers.storage[8]
-        r9 = cx16.save_virtual_registers.storage[9]
-        r10 = cx16.save_virtual_registers.storage[10]
-        r11 = cx16.save_virtual_registers.storage[11]
-        r12 = cx16.save_virtual_registers.storage[12]
-        r13 = cx16.save_virtual_registers.storage[13]
-        r14 = cx16.save_virtual_registers.storage[14]
-        r15 = cx16.save_virtual_registers.storage[15]
-    }
 }

compiler/res/version.txt

@@ -0,0 +1 @@
+8.14

compiler/src/prog8/CompilerMain.kt

@@ -20,10 +20,8 @@ import kotlin.system.exitProcess
 
 
 fun main(args: Array<String>) {
-    println("\nProg8 compiler v${prog8.buildversion.VERSION} by Irmen de Jong (irmen@razorvine.net)")
-    if('-' in prog8.buildversion.VERSION) {
-        println("Prerelease version from git commit ${prog8.buildversion.GIT_SHA.take(8)} in branch ${prog8.buildversion.GIT_BRANCH}")
-    }
+    val buildVersion = object {}.javaClass.getResource("/version.txt")?.readText()?.trim()
+    println("\nProg8 compiler v$buildVersion by Irmen de Jong (irmen@razorvine.net)")
     println("This software is licensed under the GNU GPL 3.0, see https://www.gnu.org/licenses/gpl.html\n")
 
     val succes = compileMain(args)
@@ -50,11 +48,11 @@ private fun compileMain(args: Array<String>): Boolean {
     val quietAssembler by cli.option(ArgType.Boolean, fullName = "quietasm", description = "don't print assembler output results")
     val slowCodegenWarnings by cli.option(ArgType.Boolean, fullName = "slowwarn", description="show debug warnings about slow/problematic assembly code generation")
     val sourceDirs by cli.option(ArgType.String, fullName="srcdirs", description = "list of extra paths, separated with ${File.pathSeparator}, to search in for imported modules").multiple().delimiter(File.pathSeparator)
-    val compilationTarget by cli.option(ArgType.String, fullName = "target", description = "target output of the compiler (one of '${C64Target.NAME}', '${C128Target.NAME}', '${Cx16Target.NAME}', '${AtariTarget.NAME}', '${VMTarget.NAME}') (required)")
+    val compilationTarget by cli.option(ArgType.String, fullName = "target", description = "target output of the compiler (one of '${C64Target.NAME}', '${C128Target.NAME}', '${Cx16Target.NAME}', '${AtariTarget.NAME}', '${VMTarget.NAME}')").default(C64Target.NAME)
     val startVm by cli.option(ArgType.Boolean, fullName = "vm", description = "load and run a .p8ir IR source file in the VM")
     val watchMode by cli.option(ArgType.Boolean, fullName = "watch", description = "continuous compilation mode (watch for file changes)")
-    val varsHighBank by cli.option(ArgType.Int, fullName = "varshigh", description = "put uninitialized variables in high memory area instead of at the end of the program. On the cx16 target the value specifies the HiRAM bank (0=keep active), on other systems it is ignored.")
-    val splitWordArrays by cli.option(ArgType.Boolean, fullName = "splitarrays", description = "treat all word arrays as tagged with @split to make them lsb/msb split in memory")
+    val varsHigh by cli.option(ArgType.Boolean, fullName = "varshigh", description = "put uninitialized variables in high memory area instead of at the end of the program")
+    val useNewExprCode by cli.option(ArgType.Boolean, fullName = "newexpr", description = "use new expression code-gen (experimental)")
     val moduleFiles by cli.argument(ArgType.String, fullName = "modules", description = "main module file(s) to compile").multiple(999)
 
     try {
@@ -80,20 +78,8 @@ private fun compileMain(args: Array<String>): Boolean {
     if(srcdirs.firstOrNull()!=".")
         srcdirs.add(0, ".")
 
-    if(startVm==null) {
-        if(compilationTarget==null) {
-            System.err.println("No compilation target specified")
-            return false
-        }
-
-        if (compilationTarget !in setOf(C64Target.NAME, C128Target.NAME, Cx16Target.NAME, AtariTarget.NAME, VMTarget.NAME)) {
-            System.err.println("Invalid compilation target: $compilationTarget")
-            return false
-        }
-    }
-
-    if(varsHighBank==0 && compilationTarget==Cx16Target.NAME) {
-        System.err.println("On the Commander X16, HiRAM bank 0 is used by the kernal and can't be used.")
+    if (compilationTarget !in setOf(C64Target.NAME, C128Target.NAME, Cx16Target.NAME, AtariTarget.NAME, VMTarget.NAME)) {
+        System.err.println("Invalid compilation target: $compilationTarget")
         return false
     }
 
@@ -140,10 +126,10 @@ private fun compileMain(args: Array<String>): Boolean {
                     quietAssembler == true,
                     asmListfile == true,
                     experimentalCodegen == true,
-                    varsHighBank,
-                    compilationTarget!!,
+                    varsHigh == true,
+                    useNewExprCode == true,
+                    compilationTarget,
                     evalStackAddr,
-                    splitWordArrays == true,
                     processedSymbols,
                     srcdirs,
                     outputPath
@@ -192,10 +178,6 @@ private fun compileMain(args: Array<String>): Boolean {
         }
 
     } else {
-        if((startEmulator1==true || startEmulator2==true) && moduleFiles.size>1) {
-            System.err.println("can't start emulator when multiple module files are specified")
-            return false
-        }
         for(filepathRaw in moduleFiles) {
             val filepath = pathFrom(filepathRaw).normalize()
             val compilationResult: CompilationResult
@@ -209,10 +191,10 @@ private fun compileMain(args: Array<String>): Boolean {
                     quietAssembler == true,
                     asmListfile == true,
                     experimentalCodegen == true,
-                    varsHighBank,
-                    compilationTarget!!,
+                    varsHigh == true,
+                    useNewExprCode == true,
+                    compilationTarget,
                     evalStackAddr,
-                    splitWordArrays == true,
                     processedSymbols,
                     srcdirs,
                     outputPath

compiler/src/prog8/buildversion/BuildVersion.kt

@@ -1,15 +0,0 @@
-package prog8.buildversion
-
-/**
- * Automatically generated file containing build version information.
- */
-const val MAVEN_GROUP = "prog8"
-const val MAVEN_NAME = "compiler"
-const val VERSION = "9.2-SNAPSHOT"
-const val GIT_REVISION = 3964
-const val GIT_SHA = "aaa30e4a583fa7c8da61998cf7cbb2a60b52afb0"
-const val GIT_DATE = "2023-07-16T21:16:18Z"
-const val GIT_BRANCH = "master"
-const val BUILD_DATE = "2023-07-16T21:16:23Z"
-const val BUILD_UNIX_TIME = 1689542183583L
-const val DIRTY = 1

compiler/src/prog8/compiler/BuiltinFunctions.kt

@@ -7,7 +7,10 @@ import prog8.ast.base.SyntaxError
 import prog8.ast.expressions.*
 import prog8.ast.statements.VarDecl
 import prog8.code.core.*
-import kotlin.math.*
+import kotlin.math.abs
+import kotlin.math.sign
+import kotlin.math.sqrt
+
 
 private typealias ConstExpressionCaller = (args: List<Expression>, position: Position, program: Program) -> NumericLiteral
 
@@ -16,26 +19,12 @@ internal val constEvaluatorsForBuiltinFuncs: Map<String, ConstExpressionCaller>
     "len" to ::builtinLen,
     "sizeof" to ::builtinSizeof,
     "sgn" to ::builtinSgn,
-    "sqrt__ubyte" to { a, p, prg -> oneIntArgOutputInt(a, p, prg) { sqrt(it.toDouble()) } },
-    "sqrt__uword" to { a, p, prg -> oneIntArgOutputInt(a, p, prg) { sqrt(it.toDouble()) } },
-    "sqrt__float" to { a, p, prg -> oneFloatArgOutputFloat(a, p, prg) { sqrt(it) } },
+    "sqrt16" to { a, p, prg -> oneIntArgOutputInt(a, p, prg) { sqrt(it.toDouble()) } },
     "any" to { a, p, prg -> collectionArg(a, p, prg, ::builtinAny) },
     "all" to { a, p, prg -> collectionArg(a, p, prg, ::builtinAll) },
     "lsb" to { a, p, prg -> oneIntArgOutputInt(a, p, prg) { x: Int -> (x and 255).toDouble() } },
     "msb" to { a, p, prg -> oneIntArgOutputInt(a, p, prg) { x: Int -> (x ushr 8 and 255).toDouble()} },
-    "mkword" to ::builtinMkword,
-    "clamp__ubyte" to ::builtinClampUByte,
-    "clamp__byte" to ::builtinClampByte,
-    "clamp__uword" to ::builtinClampUWord,
-    "clamp__word" to ::builtinClampWord,
-    "min__ubyte" to ::builtinMinUByte,
-    "min__byte" to ::builtinMinByte,
-    "min__uword" to ::builtinMinUWord,
-    "min__word" to ::builtinMinWord,
-    "max__ubyte" to ::builtinMaxUByte,
-    "max__byte" to ::builtinMaxByte,
-    "max__uword" to ::builtinMaxUWord,
-    "max__word" to ::builtinMaxWord
+    "mkword" to ::builtinMkword
 )
 
 private fun builtinAny(array: List<Double>): Double = if(array.any { it!=0.0 }) 1.0 else 0.0
@@ -70,16 +59,6 @@ private fun oneIntArgOutputInt(args: List<Expression>, position: Position, progr
     return NumericLiteral.optimalInteger(function(integer).toInt(), args[0].position)
 }
 
-private fun oneFloatArgOutputFloat(args: List<Expression>, position: Position, program: Program, function: (arg: Double)->Double): NumericLiteral {
-    if(args.size!=1)
-        throw SyntaxError("built-in function requires one float argument", position)
-    val constval = args[0].constValue(program) ?: throw NotConstArgumentException()
-    if(constval.type != DataType.FLOAT)
-        throw SyntaxError("built-in function requires one float argument", position)
-
-    return NumericLiteral(DataType.FLOAT, function(constval.number), args[0].position)
-}
-
 private fun collectionArg(args: List<Expression>, position: Position, program: Program, function: (arg: List<Double>)->Double): NumericLiteral {
     if(args.size!=1)
         throw SyntaxError("builtin function requires one non-scalar argument", position)
@@ -177,116 +156,3 @@ private fun builtinSgn(args: List<Expression>, position: Position, program: Prog
     val constval = args[0].constValue(program) ?: throw NotConstArgumentException()
     return NumericLiteral(DataType.BYTE, constval.number.sign, position)
 }
-
-private fun builtinMinByte(args: List<Expression>, position: Position, program: Program): NumericLiteral {
-    if (args.size != 2)
-        throw SyntaxError("min requires 2 arguments", position)
-    val val1 = args[0].constValue(program) ?: throw NotConstArgumentException()
-    val val2 = args[1].constValue(program) ?: throw NotConstArgumentException()
-    val result = min(val1.number.toInt(), val2.number.toInt())
-    return NumericLiteral(DataType.BYTE, result.toDouble(), position)
-}
-
-private fun builtinMinUByte(args: List<Expression>, position: Position, program: Program): NumericLiteral {
-    if (args.size != 2)
-        throw SyntaxError("min requires 2 arguments", position)
-    val val1 = args[0].constValue(program) ?: throw NotConstArgumentException()
-    val val2 = args[1].constValue(program) ?: throw NotConstArgumentException()
-    val result = min(val1.number.toInt(), val2.number.toInt())
-    return NumericLiteral(DataType.UBYTE, result.toDouble(), position)
-}
-
-private fun builtinMinWord(args: List<Expression>, position: Position, program: Program): NumericLiteral {
-    if (args.size != 2)
-        throw SyntaxError("min requires 2 arguments", position)
-    val val1 = args[0].constValue(program) ?: throw NotConstArgumentException()
-    val val2 = args[1].constValue(program) ?: throw NotConstArgumentException()
-    val result = min(val1.number.toInt(), val2.number.toInt())
-    return NumericLiteral(DataType.WORD, result.toDouble(), position)
-}
-
-private fun builtinMinUWord(args: List<Expression>, position: Position, program: Program): NumericLiteral {
-    if (args.size != 2)
-        throw SyntaxError("min requires 2 arguments", position)
-    val val1 = args[0].constValue(program) ?: throw NotConstArgumentException()
-    val val2 = args[1].constValue(program) ?: throw NotConstArgumentException()
-    val result = min(val1.number.toInt(), val2.number.toInt())
-    return NumericLiteral(DataType.UWORD, result.toDouble(), position)
-}
-
-private fun builtinMaxByte(args: List<Expression>, position: Position, program: Program): NumericLiteral {
-    if (args.size != 2)
-        throw SyntaxError("max requires 2 arguments", position)
-    val val1 = args[0].constValue(program) ?: throw NotConstArgumentException()
-    val val2 = args[1].constValue(program) ?: throw NotConstArgumentException()
-    val result = max(val1.number.toInt(), val2.number.toInt())
-    return NumericLiteral(DataType.BYTE, result.toDouble(), position)
-}
-
-private fun builtinMaxUByte(args: List<Expression>, position: Position, program: Program): NumericLiteral {
-    if (args.size != 2)
-        throw SyntaxError("max requires 2 arguments", position)
-    val val1 = args[0].constValue(program) ?: throw NotConstArgumentException()
-    val val2 = args[1].constValue(program) ?: throw NotConstArgumentException()
-    val result = max(val1.number.toInt(), val2.number.toInt())
-    return NumericLiteral(DataType.UBYTE, result.toDouble(), position)
-}
-
-private fun builtinMaxWord(args: List<Expression>, position: Position, program: Program): NumericLiteral {
-    if (args.size != 2)
-        throw SyntaxError("max requires 2 arguments", position)
-    val val1 = args[0].constValue(program) ?: throw NotConstArgumentException()
-    val val2 = args[1].constValue(program) ?: throw NotConstArgumentException()
-    val result = max(val1.number.toInt(), val2.number.toInt())
-    return NumericLiteral(DataType.WORD, result.toDouble(), position)
-}
-
-private fun builtinMaxUWord(args: List<Expression>, position: Position, program: Program): NumericLiteral {
-    if (args.size != 2)
-        throw SyntaxError("max requires 2 arguments", position)
-    val val1 = args[0].constValue(program) ?: throw NotConstArgumentException()
-    val val2 = args[1].constValue(program) ?: throw NotConstArgumentException()
-    val result = max(val1.number.toInt(), val2.number.toInt())
-    return NumericLiteral(DataType.UWORD, result.toDouble(), position)
-}
-
-private fun builtinClampUByte(args: List<Expression>, position: Position, program: Program): NumericLiteral {
-    if(args.size!=3)
-        throw SyntaxError("clamp requires 3 arguments", position)
-    val value = args[0].constValue(program) ?: throw NotConstArgumentException()
-    val minimum = args[1].constValue(program) ?: throw NotConstArgumentException()
-    val maximum = args[2].constValue(program) ?: throw NotConstArgumentException()
-    val result = min(max(value.number, minimum.number), maximum.number)
-    return NumericLiteral(DataType.UBYTE, result, position)
-}
-
-private fun builtinClampByte(args: List<Expression>, position: Position, program: Program): NumericLiteral {
-    if(args.size!=3)
-        throw SyntaxError("clamp requires 3 arguments", position)
-    val value = args[0].constValue(program) ?: throw NotConstArgumentException()
-    val minimum = args[1].constValue(program) ?: throw NotConstArgumentException()
-    val maximum = args[2].constValue(program) ?: throw NotConstArgumentException()
-    val result = min(max(value.number, minimum.number), maximum.number)
-    return NumericLiteral(DataType.BYTE, result, position)
-}
-
-private fun builtinClampUWord(args: List<Expression>, position: Position, program: Program): NumericLiteral {
-    if(args.size!=3)
-        throw SyntaxError("clamp requires 3 arguments", position)
-    val value = args[0].constValue(program) ?: throw NotConstArgumentException()
-    val minimum = args[1].constValue(program) ?: throw NotConstArgumentException()
-    val maximum = args[2].constValue(program) ?: throw NotConstArgumentException()
-    val result = min(max(value.number, minimum.number), maximum.number)
-    return NumericLiteral(DataType.UWORD, result, position)
-}
-
-private fun builtinClampWord(args: List<Expression>, position: Position, program: Program): NumericLiteral {
-    if(args.size!=3)
-        throw SyntaxError("clamp requires 3 arguments", position)
-    val value = args[0].constValue(program) ?: throw NotConstArgumentException()
-    val minimum = args[1].constValue(program) ?: throw NotConstArgumentException()
-    val maximum = args[2].constValue(program) ?: throw NotConstArgumentException()
-    val result = min(max(value.number, minimum.number), maximum.number)
-    return NumericLiteral(DataType.WORD, result, position)
-}
-

compiler/src/prog8/compiler/Compiler.kt

@@ -4,11 +4,12 @@ import com.github.michaelbull.result.onFailure
 import prog8.ast.IBuiltinFunctions
 import prog8.ast.Program
 import prog8.ast.base.AstException
+import prog8.ast.base.FatalAstException
 import prog8.ast.expressions.Expression
 import prog8.ast.expressions.NumericLiteral
 import prog8.ast.statements.Directive
 import prog8.code.SymbolTableMaker
-import prog8.code.ast.PtProgram
+import prog8.code.ast.*
 import prog8.code.core.*
 import prog8.code.target.*
 import prog8.codegen.vm.VmCodeGen
@@ -35,10 +36,10 @@ class CompilerArguments(val filepath: Path,
                         val quietAssembler: Boolean,
                         val asmListfile: Boolean,
                         val experimentalCodegen: Boolean,
-                        val varsHighBank: Int?,
+                        val varsHigh: Boolean,
+                        val useNewExprCode: Boolean,
                         val compilationTarget: String,
                         val evalStackBaseAddress: UInt?,
-                        val splitWordArrays: Boolean,
                         val symbolDefs: Map<String, String>,
                         val sourceDirs: List<String> = emptyList(),
                         val outputDir: Path = Path(""),
@@ -76,9 +77,9 @@ fun compileProgram(args: CompilerArguments): CompilationResult? {
                 asmQuiet = args.quietAssembler
                 asmListfile = args.asmListfile
                 experimentalCodegen = args.experimentalCodegen
-                varsHighBank = args.varsHighBank
+                varsHigh = args.varsHigh
+                useNewExprCode = args.useNewExprCode
                 evalStackBaseAddress = args.evalStackBaseAddress
-                splitWordArrays = args.splitWordArrays
                 outputDir = args.outputDir.normalize()
                 symbolDefs = args.symbolDefs
             }
@@ -280,9 +281,10 @@ fun determineCompilationOptions(program: Program, compTarget: ICompilationTarget
     val launcherTypeStr = launcherDirective?.args?.single()?.name?.uppercase()
     val zpoption: String? = (toplevelModule.statements.singleOrNull { it is Directive && it.directive == "%zeropage" }
             as? Directive)?.args?.single()?.name?.uppercase()
-    val allOptions = program.modules.flatMap { it.options() }.toSet()
-    val floatsEnabled = "enable_floats" in allOptions
-    val noSysInit = "no_sysinit" in allOptions
+    val allOptions = program.modules.flatMap { it.statements }.filter { it is Directive && it.directive == "%option" }
+        .flatMap { (it as Directive).args }.toSet()
+    val floatsEnabled = allOptions.any { it.name == "enable_floats" }
+    val noSysInit = allOptions.any { it.name == "no_sysinit" }
     val zpType: ZeropageType =
         if (zpoption == null)
             if (floatsEnabled) ZeropageType.FLOATSAFE else ZeropageType.KERNALSAFE
@@ -368,8 +370,8 @@ private fun optimizeAst(program: Program, compilerOptions: CompilationOptions, e
         // keep optimizing expressions and statements until no more steps remain
         val optsDone1 = program.simplifyExpressions(errors, compTarget)
         val optsDone2 = program.splitBinaryExpressions(compilerOptions)
-        val optsDone3 = program.optimizeStatements(errors, functions, compilerOptions)
-        val optsDone4 = program.inlineSubroutines(compilerOptions)
+        val optsDone3 = program.optimizeStatements(errors, functions, compTarget)
+        val optsDone4 = program.inlineSubroutines()
         program.constantFold(errors, compTarget) // because simplified statements and expressions can result in more constants that can be folded away
         errors.report()
         if (optsDone1 + optsDone2 + optsDone3 + optsDone4 == 0)
@@ -403,12 +405,23 @@ private fun createAssemblyAndAssemble(program: PtProgram,
     val asmgen = if(compilerOptions.experimentalCodegen)
         prog8.codegen.experimental.ExperiCodeGen()
     else if (compilerOptions.compTarget.machine.cpu in arrayOf(CpuType.CPU6502, CpuType.CPU65c02))
-        prog8.codegen.cpu6502.AsmGen6502(prefixSymbols = true)
+        prog8.codegen.cpu6502.AsmGen6502()
     else if (compilerOptions.compTarget.name == VMTarget.NAME)
         VmCodeGen()
     else
         throw NotImplementedError("no code generator for cpu ${compilerOptions.compTarget.machine.cpu}")
 
+    if(compilerOptions.useNewExprCode) {
+        if(compilerOptions.compTarget.machine.cpu !in arrayOf(CpuType.CPU6502, CpuType.CPU65c02)) {
+            // the IR code gen backend has its own, better, version of dealing with binary expressions.
+            throw IllegalArgumentException("'newexpr' expression rewrite should not be used with compilation target ${compilerOptions.compTarget.name}")
+        }
+
+        transformNewExpressions(program)
+    }
+
+    // printAst(program, true) { println(it) }
+
     val stMaker = SymbolTableMaker(program, compilerOptions)
     val symbolTable = stMaker.make()
     val assembly = asmgen.generate(program, symbolTable, compilerOptions, errors)
@@ -420,3 +433,188 @@ private fun createAssemblyAndAssemble(program: PtProgram,
         false
     }
 }
+
+private fun transformNewExpressions(program: PtProgram) {
+    val newVariables = mutableMapOf<PtSub, MutableList<PtVariable>>()
+    var countByteVars = 0
+    var countWordVars = 0
+    var countFloatVars = 0
+    // TODO: find a reliable way to reuse more temp vars across expressions
+
+    fun getExprVar(type: DataType, pos: Position, scope: PtSub): PtIdentifier {
+        val count = when(type) {
+            in ByteDatatypes -> {
+                countByteVars++
+                countByteVars
+            }
+            in WordDatatypes -> {
+                countWordVars++
+                countWordVars
+            }
+            DataType.FLOAT -> {
+                countFloatVars++
+                countFloatVars
+            }
+            else -> throw FatalAstException("weird dt")
+        }
+        val name = "p8p_exprvar_${count}_${type.toString().lowercase()}"
+        var subVars = newVariables[scope]
+        if(subVars==null) {
+            subVars = mutableListOf()
+            newVariables[scope] = subVars
+        }
+        if(subVars.all { it.name!=name }) {
+            subVars.add(PtVariable(name, type, ZeropageWish.DONTCARE, null, null, pos))
+        }
+        return PtIdentifier("${scope.scopedName}.$name", type, pos)
+    }
+
+    fun transformExpr(expr: PtBinaryExpression): Pair<PtExpression, List<IPtAssignment>> {
+        // depth first process the expression tree
+        val scope = expr.definingSub()!!
+        val assignments = mutableListOf<IPtAssignment>()
+
+        fun transformOperand(node: PtExpression): PtNode {
+            return when(node) {
+                is PtNumber, is PtIdentifier, is PtArray, is PtString, is PtMachineRegister -> node
+                is PtBinaryExpression -> {
+                    val (replacement, subAssigns) = transformExpr(node)
+                    assignments.addAll(subAssigns)
+                    replacement
+                }
+                else -> {
+                    val variable = getExprVar(node.type, node.position, scope)
+                    val assign = PtAssignment(node.position)
+                    val target = PtAssignTarget(variable.position)
+                    target.add(variable)
+                    assign.add(target)
+                    assign.add(node)
+                    assignments.add(assign)
+                    variable
+                }
+            }
+        }
+
+        val newLeft = transformOperand(expr.left)
+        val newRight = transformOperand(expr.right)
+
+        // process the binexpr
+
+        val resultVar =
+            if(expr.type == expr.left.type) {
+                getExprVar(expr.type, expr.position, scope)
+            } else {
+                if(expr.operator in ComparisonOperators && expr.type in ByteDatatypes) {
+                    // this is very common and should be dealth with correctly; byte==0, word>42
+                    val varType = if(expr.left.type in PassByReferenceDatatypes) DataType.UWORD else expr.left.type
+                    getExprVar(varType, expr.position, scope)
+                }
+                else if(expr.left.type in PassByReferenceDatatypes && expr.type==DataType.UBYTE) {
+                    // this is common and should be dealth with correctly; for instance "name"=="john"
+                    val varType = if (expr.left.type in PassByReferenceDatatypes) DataType.UWORD else expr.left.type
+                    getExprVar(varType, expr.position, scope)
+                } else if(expr.left.type equalsSize expr.type) {
+                    getExprVar(expr.type, expr.position, scope)
+                } else {
+                    TODO("expression type differs from left operand type! got ${expr.left.type} expected ${expr.type}   ${expr.position}")
+                }
+            }
+
+        if(resultVar.name!=(newLeft as? PtIdentifier)?.name) {
+            // resultvar = left
+            val assign1 = PtAssignment(newLeft.position)
+            val target1 = PtAssignTarget(resultVar.position)
+            target1.add(resultVar)
+            assign1.add(target1)
+            assign1.add(newLeft)
+            assignments.add(assign1)
+        }
+        // resultvar {oper}= right
+        val operator = if(expr.operator in ComparisonOperators) expr.operator else expr.operator+'='
+        val assign2 = PtAugmentedAssign(operator, newRight.position)
+        val target2 = PtAssignTarget(resultVar.position)
+        target2.add(resultVar.copy())
+        assign2.add(target2)
+        assign2.add(newRight)
+        assignments.add(assign2)
+        return Pair(resultVar, assignments)
+    }
+
+    fun isProperStatement(node: PtNode): Boolean {
+        return when(node) {
+            is PtAssignment -> true
+            is PtAugmentedAssign -> true
+            is PtBreakpoint -> true
+            is PtConditionalBranch -> true
+            is PtForLoop -> true
+            is PtIfElse -> true
+            is PtIncludeBinary -> true
+            is PtInlineAssembly -> true
+            is PtJump -> true
+            is PtAsmSub -> true
+            is PtLabel -> true
+            is PtSub -> true
+            is PtVariable -> true
+            is PtNop -> true
+            is PtPostIncrDecr -> true
+            is PtRepeatLoop -> true
+            is PtReturn -> true
+            is PtWhen -> true
+            is PtBuiltinFunctionCall -> node.void
+            is PtFunctionCall -> node.void
+            else -> false
+        }
+    }
+
+    fun transform(node: PtNode, parent: PtNode) {
+        if(node is PtBinaryExpression) {
+            node.children.toTypedArray().forEach {
+                transform(it, node)
+            }
+            val (rep, assignments) = transformExpr(node)
+            var replacement = rep
+            if(!(rep.type equalsSize node.type)) {
+                if(rep.type in NumericDatatypes && node.type in ByteDatatypes) {
+                    replacement = PtTypeCast(node.type, node.position)
+                    replacement.add(rep)
+                } else
+                    TODO("cast replacement type ${rep.type} -> ${node.type}")
+            }
+            var idx = parent.children.indexOf(node)
+            parent.children[idx] = replacement
+            replacement.parent = parent
+            // find the statement above which we should insert the assignments
+            var stmt = node
+            while(!isProperStatement(stmt))
+                stmt = stmt.parent
+            idx = stmt.parent.children.indexOf(stmt)
+            assignments.reversed().forEach {
+                stmt.parent.add(idx, it as PtNode)
+            }
+        } else {
+            node.children.toTypedArray().forEach { child -> transform(child, node) }
+        }
+    }
+
+    program.allBlocks().forEach { block ->
+        block.children.toTypedArray().forEach {
+            transform(it, block)
+        }
+    }
+
+    // add the new variables
+    newVariables.forEach { (sub, vars) ->
+        vars.forEach {
+            sub.add(0, it)
+        }
+    }
+
+    // extra check to see that all PtBinaryExpressions have been transformed
+    fun binExprCheck(node: PtNode) {
+        if(node is PtBinaryExpression)
+            throw IllegalArgumentException("still got binexpr $node ${node.position}")
+        node.children.forEach { binExprCheck(it) }
+    }
+    binExprCheck(program)
+}
+

compiler/src/prog8/compiler/ErrorReporter.kt

@@ -21,10 +21,6 @@ internal class ErrorReporter: IErrorReporter {
         messages.add(CompilerMessage(MessageSeverity.WARNING, msg, position))
     }
 
-    override fun undefined(symbol: List<String>, position: Position) {
-        err("undefined symbol: ${symbol.joinToString(".")}", position)
-    }
-
     override fun report() {
         var numErrors = 0
         var numWarnings = 0

compiler/src/prog8/compiler/ModuleImporter.kt

@@ -32,7 +32,6 @@ class ModuleImporter(private val program: Program,
             val programPath = path.resolve(normalizedFilePath)
             if(programPath.exists()) {
                 println("Compiling program ${Path("").absolute().relativize(programPath)}")
-                println("Compiler target: $compilationTargetName")
                 val source = SourceCode.File(programPath)
                 return Ok(importModule(source))
             }

compiler/src/prog8/compiler/astprocessing/AsmInstructionNamesFinder.kt

@@ -0,0 +1,49 @@
+package prog8.compiler.astprocessing
+
+import prog8.ast.statements.Block
+import prog8.ast.statements.Label
+import prog8.ast.statements.Subroutine
+import prog8.ast.statements.VarDecl
+import prog8.ast.walk.IAstVisitor
+import prog8.code.core.ICompilationTarget
+import prog8.code.target.VMTarget
+
+class  AsmInstructionNamesFinder(val target: ICompilationTarget): IAstVisitor {
+
+    val blocks = mutableSetOf<Block>()
+    val variables = mutableSetOf<VarDecl>()
+    val labels = mutableSetOf<Label>()
+    val subroutines = mutableSetOf<Subroutine>()
+
+    private fun isPossibleInstructionName(name: String) = name.length==3 && name.all { it.isLetter() }
+
+    fun foundAny(): Boolean = blocks.isNotEmpty() || variables.isNotEmpty() || subroutines.isNotEmpty() || labels.isNotEmpty()
+
+    override fun visit(block: Block) {
+        if(target.name!=VMTarget.NAME && !block.isInLibrary && isPossibleInstructionName(block.name)) {
+            blocks += block
+        }
+        super.visit(block)
+    }
+
+    override fun visit(decl: VarDecl) {
+        if(target.name!=VMTarget.NAME && !decl.definingModule.isLibrary && isPossibleInstructionName(decl.name)) {
+            variables += decl
+        }
+        super.visit(decl)
+    }
+
+    override fun visit(label: Label) {
+        if(target.name!=VMTarget.NAME && !label.definingModule.isLibrary && isPossibleInstructionName(label.name)) {
+            labels += label
+        }
+        super.visit(label)
+    }
+
+    override fun visit(subroutine: Subroutine) {
+        if(target.name!=VMTarget.NAME && !subroutine.definingModule.isLibrary && isPossibleInstructionName(subroutine.name)) {
+            subroutines += subroutine
+        }
+        super.visit(subroutine)
+    }
+}

compiler/src/prog8/compiler/astprocessing/AsmInstructionNamesReplacer.kt

@@ -0,0 +1,101 @@
+package prog8.compiler.astprocessing
+
+import prog8.ast.Node
+import prog8.ast.expressions.IdentifierReference
+import prog8.ast.statements.*
+import prog8.ast.walk.AstWalker
+import prog8.ast.walk.IAstModification
+
+class AsmInstructionNamesReplacer(
+    val blocks: Set<Block>,
+    val subroutines: Set<Subroutine>,
+    val variables: Set<VarDecl>,
+    val labels: Set<Label>): AstWalker() {
+
+    override fun after(identifier: IdentifierReference, parent: Node): Iterable<IAstModification> {
+        val newName = identifier.nameInSource.map { ident ->
+            if(ident.length==3 && !identifier.definingModule.isLibrary) {
+                val blockTarget = blocks.firstOrNull { it.name==ident }
+                val subTarget = subroutines.firstOrNull {it.name==ident }
+                val varTarget = variables.firstOrNull { it.name==ident }
+                val labelTarget = labels.firstOrNull { it.name==ident}
+
+                if(blockTarget!=null || subTarget!=null || varTarget!=null || labelTarget!=null) {
+                    "p8p_$ident"
+                } else
+                     ident
+            } else
+                 ident
+        }
+
+        return if(newName!=identifier.nameInSource)
+            listOf(IAstModification.ReplaceNode(identifier, IdentifierReference(newName, identifier.position), parent))
+        else
+            noModifications
+    }
+
+    override fun after(label: Label, parent: Node): Iterable<IAstModification> {
+        return if(label in labels)
+            listOf(IAstModification.ReplaceNode(label, Label("p8p_${label.name}", label.position), parent))
+        else
+            noModifications
+    }
+
+    override fun after(block: Block, parent: Node): Iterable<IAstModification> {
+        return if(block in blocks)
+            listOf(IAstModification.ReplaceNode(block, Block("p8p_${block.name}", block.address, block.statements, block.isInLibrary, block.position), parent))
+        else
+            noModifications
+    }
+
+    override fun after(decl: VarDecl, parent: Node): Iterable<IAstModification> {
+        return if(decl in variables)
+            listOf(IAstModification.ReplaceNode(decl, decl.renamed("p8p_${decl.name}"), parent))
+        else
+            noModifications
+    }
+
+    private val subsWithParamRefsToFix = mutableListOf<Subroutine>()
+
+    override fun applyModifications(): Int {
+        var count = super.applyModifications()
+        subsWithParamRefsToFix.forEach { subroutine ->
+            subroutine.statements.withIndex().reversed().forEach { (index,stmt) ->
+                if(stmt is VarDecl && stmt.origin==VarDeclOrigin.SUBROUTINEPARAM) {
+                    val param = subroutine.parameters.single { it.name == stmt.name}
+                    val decl = VarDecl.fromParameter(param)
+                    subroutine.statements[index] = decl
+                    decl.linkParents(subroutine)
+                    count++
+                }
+            }
+        }
+        return count
+    }
+
+    override fun after(subroutine: Subroutine, parent: Node): Iterable<IAstModification> {
+        val changedParams = mutableListOf<Pair<Int, SubroutineParameter>>()
+        subroutine.parameters.withIndex().forEach { (index, param) ->
+            if(param.name.length==3 && param.name.all { it.isLetter() } && !param.definingModule.isLibrary) {
+                changedParams.add(index to SubroutineParameter("p8p_${param.name}", param.type, param.position))
+            }
+        }
+
+        changedParams.forEach { (index, newParam) -> subroutine.parameters[index] = newParam }
+        val newName = if(subroutine in subroutines) "p8p_${subroutine.name}" else subroutine.name
+
+        return if(newName!=subroutine.name || changedParams.isNotEmpty()) {
+            val newSub = Subroutine(newName, subroutine.parameters, subroutine.returntypes,
+                subroutine.asmParameterRegisters, subroutine.asmReturnvaluesRegisters, subroutine.asmClobbers, subroutine.asmAddress, subroutine.isAsmSubroutine,
+                subroutine.inline, false, subroutine.statements, subroutine.position)
+            if(changedParams.isNotEmpty())
+                subsWithParamRefsToFix += newSub
+            listOf(IAstModification.ReplaceNode(subroutine, newSub, parent))
+        } else {
+            if(changedParams.isNotEmpty())
+                subsWithParamRefsToFix += subroutine
+            noModifications
+        }
+    }
+
+}

compiler/src/prog8/compiler/astprocessing/AstChecker.kt

@@ -12,7 +12,6 @@ import prog8.compiler.builtinFunctionReturnType
 import java.io.CharConversionException
 import java.io.File
 import kotlin.io.path.Path
-import kotlin.math.floor
 
 /**
  * Semantic analysis.
@@ -63,7 +62,7 @@ internal class AstChecker(private val program: Program,
     override fun visit(identifier: IdentifierReference) {
         val stmt = identifier.targetStatement(program)
         if(stmt==null)
-            errors.undefined(identifier.nameInSource, identifier.position)
+            errors.err("undefined symbol: ${identifier.nameInSource.joinToString(".")}", identifier.position)
         else {
             val target = stmt as? VarDecl
             if (target != null && target.origin == VarDeclOrigin.SUBROUTINEPARAM) {
@@ -115,8 +114,6 @@ internal class AstChecker(private val program: Program,
                         if (returnValue == null || returnValue.type != DataType.UBYTE || (returnValue.number!=0.0 && returnValue.number!=1.0)) {
                             errors.err("type $valueDt of return value doesn't match subroutine's return type ${expectedReturnValues[0]}",returnStmt.value!!.position)
                         }
-                    } else if(valueDt.isIterable && expectedReturnValues[0]==DataType.UWORD) {
-                        // you can return a string or array when a uword (pointer) is returned
                     }
                     else {
                         errors.err("type $valueDt of return value doesn't match subroutine's return type ${expectedReturnValues[0]}",returnStmt.value!!.position)
@@ -129,11 +126,8 @@ internal class AstChecker(private val program: Program,
 
     override fun visit(ifElse: IfElse) {
         val dt = ifElse.condition.inferType(program)
-        if(!dt.isInteger && !dt.istype(DataType.BOOL)) {
-            val identifier = ifElse.condition as? IdentifierReference
-            if(identifier==null || identifier.targetStatement(program)!=null)
-                errors.err("condition value should be an integer type or bool", ifElse.condition.position)
-        }
+        if(!dt.isInteger && !dt.istype(DataType.BOOL))
+            errors.err("condition value should be an integer type or bool", ifElse.condition.position)
         super.visit(ifElse)
     }
 
@@ -171,8 +165,7 @@ internal class AstChecker(private val program: Program,
                     }
                     DataType.UWORD -> {
                         if(iterableDt!= DataType.UBYTE && iterableDt!= DataType.UWORD && iterableDt != DataType.STR &&
-                                iterableDt != DataType.ARRAY_UB && iterableDt != DataType.ARRAY_UW &&
-                                iterableDt != DataType.ARRAY_UW_SPLIT)
+                                iterableDt != DataType.ARRAY_UB && iterableDt!= DataType.ARRAY_UW)
                             errors.err("uword loop variable can only loop over unsigned bytes, words or strings", forLoop.position)
 
                         checkUnsignedLoopDownto0(forLoop.iterable as? RangeExpression)
@@ -183,8 +176,7 @@ internal class AstChecker(private val program: Program,
                     }
                     DataType.WORD -> {
                         if(iterableDt!= DataType.BYTE && iterableDt!= DataType.WORD &&
-                                iterableDt != DataType.ARRAY_B && iterableDt!= DataType.ARRAY_W &&
-                                iterableDt != DataType.ARRAY_W_SPLIT)
+                                iterableDt != DataType.ARRAY_B && iterableDt!= DataType.ARRAY_W)
                             errors.err("word loop variable can only loop over bytes or words", forLoop.position)
                     }
                     DataType.FLOAT -> {
@@ -341,7 +333,7 @@ internal class AstChecker(private val program: Program,
             for(param in subroutine.parameters.zip(subroutine.asmParameterRegisters)) {
                 if(param.second.registerOrPair in arrayOf(RegisterOrPair.A, RegisterOrPair.X, RegisterOrPair.Y)) {
                     if (param.first.type != DataType.UBYTE && param.first.type != DataType.BYTE && param.first.type != DataType.BOOL)
-                        errors.err("parameter '${param.first.name}' should be (u)byte or bool", param.first.position)
+                        err("parameter '${param.first.name}' should be (u)byte or bool")
                 }
                 else if(param.second.registerOrPair in arrayOf(RegisterOrPair.AX, RegisterOrPair.AY, RegisterOrPair.XY)) {
                     if (param.first.type != DataType.UWORD && param.first.type != DataType.WORD
@@ -349,8 +341,8 @@ internal class AstChecker(private val program: Program,
                         err("parameter '${param.first.name}' should be (u)word (an address) or str")
                 }
                 else if(param.second.statusflag!=null) {
-                    if (param.first.type != DataType.BOOL)
-                        errors.err("parameter '${param.first.name}' should be of type bool", param.first.position)
+                    if (param.first.type != DataType.UBYTE && param.first.type != DataType.BOOL)
+                        err("parameter '${param.first.name}' should be bool or ubyte")
                 }
             }
             subroutine.returntypes.zip(subroutine.asmReturnvaluesRegisters).forEachIndexed { index, pair ->
@@ -364,8 +356,8 @@ internal class AstChecker(private val program: Program,
                         err("return type #${index + 1} should be (u)word/address")
                 }
                 else if(pair.second.statusflag!=null) {
-                    if (pair.first != DataType.BOOL)
-                        err("return type #${index + 1} should be bool")
+                    if (pair.first != DataType.UBYTE && pair.first != DataType.BOOL)
+                        err("return type #${index + 1} should be bool or ubyte")
                 }
             }
 
@@ -436,6 +428,7 @@ internal class AstChecker(private val program: Program,
             val statusFlagsNoCarry = subroutine.asmParameterRegisters.mapNotNull { it.statusflag }.toSet() - Statusflag.Pc
             if(statusFlagsNoCarry.isNotEmpty())
                 err("can only use Carry as status flag parameter")
+
         }
 
         // Non-string and non-ubytearray Pass-by-reference datatypes can not occur as parameters to a subroutine directly
@@ -449,30 +442,22 @@ internal class AstChecker(private val program: Program,
 
     override fun visit(untilLoop: UntilLoop) {
         val dt = untilLoop.condition.inferType(program)
-        if(!dt.isInteger && !dt.istype(DataType.BOOL)) {
-            val identifier = untilLoop.condition as? IdentifierReference
-            if(identifier==null || identifier.targetStatement(program)!=null)
-                errors.err("condition value should be an integer type or bool", untilLoop.condition.position)
-        }
+        if(!dt.isInteger && !dt.istype(DataType.BOOL))
+            errors.err("condition value should be an integer type or bool", untilLoop.condition.position)
         super.visit(untilLoop)
     }
 
     override fun visit(whileLoop: WhileLoop) {
         val dt = whileLoop.condition.inferType(program)
-        if(!dt.isInteger && !dt.istype(DataType.BOOL)) {
-            val identifier = whileLoop.condition as? IdentifierReference
-            if(identifier==null || identifier.targetStatement(program)!=null)
-                errors.err("condition value should be an integer type or bool", whileLoop.condition.position)
-        }
+        if(!dt.isInteger && !dt.istype(DataType.BOOL))
+            errors.err("condition value should be an integer type or bool", whileLoop.condition.position)
         super.visit(whileLoop)
     }
 
     override fun visit(repeatLoop: RepeatLoop) {
         val iterations = repeatLoop.iterations?.constValue(program)
-        if (iterations != null) {
-            require(floor(iterations.number)==iterations.number)
-            if (iterations.number.toInt() > 65535) errors.err("repeat cannot go over 65535 iterations", iterations.position)
-        }
+        if(iterations != null && iterations.number.toInt() > 65535)
+            errors.err("repeat cannot go over 65535 iterations", iterations.position)
 
         val ident = repeatLoop.iterations as? IdentifierReference
         if(ident!=null) {
@@ -536,7 +521,7 @@ internal class AstChecker(private val program: Program,
             val targetName = targetIdentifier.nameInSource
             when (val targetSymbol = assignment.definingScope.lookup(targetName)) {
                 null -> {
-                    errors.undefined(targetIdentifier.nameInSource, targetIdentifier.position)
+                    errors.err("undefined symbol: ${targetIdentifier.nameInSource.joinToString(".")}", targetIdentifier.position)
                     return
                 }
                 !is VarDecl -> {
@@ -644,9 +629,6 @@ internal class AstChecker(private val program: Program,
                         DataType.ARRAY_B, DataType.ARRAY_UB ->
                             if(arraySize > 256)
                                 err("byte array length must be 1-256")
-                        in SplitWordArrayTypes ->
-                            if(arraySize > 256)
-                                err("split word array length must be 1-256")
                         DataType.ARRAY_W, DataType.ARRAY_UW ->
                             if(arraySize > 128)
                                 err("word array length must be 1-128")
@@ -695,10 +677,6 @@ internal class AstChecker(private val program: Program,
                         if (length == 0 || length > 256)
                             err("string and byte array length must be 1-256")
                     }
-                    in SplitWordArrayTypes -> {
-                        if (length == 0 || length > 256)
-                            err("split word array length must be 1-256")
-                    }
                     DataType.ARRAY_UW, DataType.ARRAY_W -> {
                         if (length == 0 || length > 128)
                             err("word array length must be 1-128")
@@ -711,9 +689,6 @@ internal class AstChecker(private val program: Program,
                     }
                 }
             }
-
-            if(decl.splitArray && decl.type==VarDeclType.MEMORY)
-                err("@split can't be used on memory mapped arrays")
         }
 
         if(decl.datatype==DataType.STR) {
@@ -746,13 +721,13 @@ internal class AstChecker(private val program: Program,
             "%output" -> {
                 if(directive.parent !is Module)
                     err("this directive may only occur at module level")
-                if(directive.args.size!=1 || directive.args[0].name !in OutputType.entries.map {it.name.lowercase()})
+                if(directive.args.size!=1 || directive.args[0].name !in OutputType.values().map {it.name.lowercase()})
                     err("invalid output directive type")
             }
             "%launcher" -> {
                 if(directive.parent !is Module)
                     err("this directive may only occur at module level")
-                if(directive.args.size!=1 || directive.args[0].name !in CbmPrgLauncherType.entries.map{it.name.lowercase()})
+                if(directive.args.size!=1 || directive.args[0].name !in CbmPrgLauncherType.values().map{it.name.lowercase()})
                     err("invalid launcher directive type")
             }
             "%zeropage" -> {
@@ -817,7 +792,7 @@ internal class AstChecker(private val program: Program,
                     err("this directive may only occur in a block or at module level")
                 if(directive.args.isEmpty())
                     err("missing option directive argument(s)")
-                else if(directive.args.map{it.name in arrayOf("enable_floats", "force_output", "no_sysinit", "align_word", "align_page", "merge", "splitarrays", "no_symbol_prefixing")}.any { !it })
+                else if(directive.args.map{it.name in arrayOf("enable_floats", "force_output", "no_sysinit", "align_word", "align_page", "merge")}.any { !it })
                     err("invalid option directive argument(s)")
             }
             else -> throw SyntaxError("invalid directive ${directive.directive}", directive.position)
@@ -980,8 +955,6 @@ internal class AstChecker(private val program: Program,
                 // expression with one side BOOL other side (U)BYTE is allowed; bool==byte
             } else if((expr.operator == "<<" || expr.operator == ">>") && (leftDt in WordDatatypes && rightDt in ByteDatatypes)) {
                 // exception allowed: shifting a word by a byte
-            } else if((leftDt==DataType.UWORD && rightDt==DataType.STR) || (leftDt==DataType.STR && rightDt==DataType.UWORD)) {
-                // exception allowed: comparing uword (pointer) with string
             } else {
                 errors.err("left and right operands aren't the same type", expr.left.position)
             }
@@ -1167,13 +1140,21 @@ internal class AstChecker(private val program: Program,
                     }
                 }
             }
-            else if(funcName[0].startsWith("divmod")) {
-                if(functionCallStatement.args[2] is TypecastExpression || functionCallStatement.args[3] is TypecastExpression) {
-                    errors.err("arguments must be all ubyte or all uword", functionCallStatement.position)
-                } else {
-                    if(functionCallStatement.args[2] !is IdentifierReference || functionCallStatement.args[3] !is IdentifierReference)
-                        errors.err("arguments 3 and 4 must be variables to receive the division and remainder", functionCallStatement.position)
-                }
+            else if(funcName[0] == "divmod") {
+                if(functionCallStatement.args[2] !is IdentifierReference || functionCallStatement.args[3] !is IdentifierReference)
+                    errors.err("arguments 3 and 4 must be variables to receive the division and remainder", functionCallStatement.position)
+                if(functionCallStatement.args[2] is TypecastExpression || functionCallStatement.args[3] is TypecastExpression)
+                    errors.err("all arguments must be ubyte", functionCallStatement.position)
+                if(!functionCallStatement.args.all {it.inferType(program) istype DataType.UBYTE})
+                    errors.err("all arguments must be ubyte", functionCallStatement.position)
+            }
+            else if(funcName[0] == "divmodw") {
+                if(functionCallStatement.args[2] !is IdentifierReference || functionCallStatement.args[3] !is IdentifierReference)
+                    errors.err("arguments 3 and 4 must be variables to receive the division and remainder", functionCallStatement.position)
+                if(functionCallStatement.args[2] is TypecastExpression || functionCallStatement.args[3] is TypecastExpression)
+                    errors.err("all arguments must be uword", functionCallStatement.position)
+                if(!functionCallStatement.args.all {it.inferType(program) istype DataType.UWORD})
+                    errors.err("all arguments must be uword", functionCallStatement.position)
             }
 
             if(funcName[0] in InplaceModifyingBuiltinFunctions) {
@@ -1251,7 +1232,7 @@ internal class AstChecker(private val program: Program,
             val target = postIncrDecr.definingScope.lookup(targetName)
             if(target==null) {
                 val symbol = postIncrDecr.target.identifier!!
-                errors.undefined(symbol.nameInSource, symbol.position)
+                errors.err("undefined symbol: ${symbol.nameInSource.joinToString(".")}", symbol.position)
             } else {
                 if(target !is VarDecl || target.type== VarDeclType.CONST) {
                     errors.err("can only increment or decrement a variable", postIncrDecr.position)
@@ -1304,7 +1285,7 @@ internal class AstChecker(private val program: Program,
 
         // check index value 0..255
         val dtxNum = arrayIndexedExpression.indexer.indexExpr.inferType(program)
-        if(dtxNum.isKnown && dtxNum isnot DataType.UBYTE && dtxNum isnot DataType.BYTE)
+        if(dtxNum isnot DataType.UBYTE && dtxNum isnot DataType.BYTE)
             errors.err("array indexing is limited to byte size 0..255", arrayIndexedExpression.position)
 
         super.visit(arrayIndexedExpression)
@@ -1341,14 +1322,8 @@ internal class AstChecker(private val program: Program,
                     constvalue == null -> errors.err("choice value must be a constant", whenChoice.position)
                     constvalue.type !in IntegerDatatypes -> errors.err("choice value must be a byte or word", whenChoice.position)
                     conditionType isnot constvalue.type -> {
-                        if(conditionType.isKnown) {
-                            if(conditionType.istype(DataType.BOOL)) {
-                                if(constvalue.number!=0.0 && constvalue.number!=1.0)
-                                    errors.err("choice value datatype differs from condition value", whenChoice.position)
-                            } else {
-                                errors.err("choice value datatype differs from condition value", whenChoice.position)
-                            }
-                        }
+                        if(conditionType.isKnown)
+                            errors.err("choice value datatype differs from condition value", whenChoice.position)
                     }
                 }
             }
@@ -1390,32 +1365,6 @@ internal class AstChecker(private val program: Program,
         super.visit(containment)
     }
 
-    override fun visit(memread: DirectMemoryRead) {
-        if(!memread.addressExpression.inferType(program).istype(DataType.UWORD)) {
-            errors.err("address for memory access isn't uword", memread.position)
-        }
-        val tc = memread.addressExpression as? TypecastExpression
-        if(tc!=null && tc.implicit) {
-            if(!tc.expression.inferType(program).istype(DataType.UWORD)) {
-                errors.err("address for memory access isn't uword", memread.position)
-            }
-        }
-        super.visit(memread)
-    }
-
-    override fun visit(memwrite: DirectMemoryWrite) {
-        if(!memwrite.addressExpression.inferType(program).istype(DataType.UWORD)) {
-            errors.err("address for memory access isn't uword", memwrite.position)
-        }
-        val tc = memwrite.addressExpression as? TypecastExpression
-        if(tc!=null && tc.implicit) {
-            if(!tc.expression.inferType(program).istype(DataType.UWORD)) {
-                errors.err("address for memory access isn't uword", memwrite.position)
-            }
-        }
-        super.visit(memwrite)
-    }
-
     private fun checkFunctionOrLabelExists(target: IdentifierReference, statement: Statement): Statement? {
         when (val targetStatement = target.targetStatement(program)) {
             is Label, is Subroutine, is BuiltinFunctionPlaceholder -> return targetStatement
@@ -1429,7 +1378,7 @@ internal class AstChecker(private val program: Program,
                 else
                     errors.err("cannot call that: ${target.nameInSource.joinToString(".")}", target.position)
             }
-            null -> errors.undefined(target.nameInSource, target.position)
+            null -> errors.err("undefined symbol: ${target.nameInSource.joinToString(".")}", target.position)
             else -> errors.err("cannot call that: ${target.nameInSource.joinToString(".")}", target.position)
         }
         return null
@@ -1486,23 +1435,22 @@ internal class AstChecker(private val program: Program,
                 }
                 return err("invalid byte array initialization value ${value.type}, expected $targetDt")
             }
-            DataType.ARRAY_UW, DataType.ARRAY_W, DataType.ARRAY_W_SPLIT, DataType.ARRAY_UW_SPLIT-> {
+            DataType.ARRAY_UW, DataType.ARRAY_W -> {
                 // value may be either a single word, or a word arraysize, or a range
                 if(value.type istype targetDt) {
                     if(!checkArrayValues(value, targetDt))
                         return false
                     val arraySpecSize = arrayspec.constIndex()
                     val arraySize = value.value.size
-                    val maxLength = if(targetDt in SplitWordArrayTypes) 256 else 128
                     if(arraySpecSize!=null && arraySpecSize>0) {
-                        if(arraySpecSize>maxLength)
-                            return err("array length must be 1-$maxLength")
+                        if(arraySpecSize>128)
+                            return err("word array length must be 1-128")
                         val expectedSize = arrayspec.constIndex() ?: return err("array size specifier must be constant integer value")
                         if (arraySize != expectedSize)
                             return err("initializer array size mismatch (expecting $expectedSize, got $arraySize)")
                         return true
                     }
-                    return err("invalid array size, must be 1-$maxLength")
+                    return err("invalid word array size, must be 1-128")
                 }
                 return err("invalid word array initialization value ${value.type}, expected $targetDt")
             }
@@ -1590,7 +1538,6 @@ internal class AstChecker(private val program: Program,
             when (it) {
                 is NumericLiteral -> it.number.toInt()
                 is AddressOf -> it.identifier.hashCode() and 0xffff
-                is IdentifierReference -> it.hashCode() and 0xffff
                 is TypecastExpression -> {
                     val constVal = it.expression.constValue(program)
                     val cast = constVal?.cast(it.type)
@@ -1610,10 +1557,10 @@ internal class AstChecker(private val program: Program,
             DataType.ARRAY_B -> {
                 correct = array.all { it in -128..127 }
             }
-            DataType.ARRAY_UW, DataType.ARRAY_UW_SPLIT -> {
+            DataType.ARRAY_UW -> {
                 correct = array.all { (it in 0..65535) }
             }
-            DataType.ARRAY_W, DataType.ARRAY_W_SPLIT -> {
+            DataType.ARRAY_W -> {
                 correct = array.all { it in -32768..32767 }
             }
             DataType.ARRAY_F -> correct = true

compiler/src/prog8/compiler/astprocessing/AstExtensions.kt

@@ -12,6 +12,7 @@ import prog8.ast.statements.VarDeclOrigin
 import prog8.ast.walk.AstWalker
 import prog8.ast.walk.IAstModification
 import prog8.code.core.*
+import prog8.code.target.VMTarget
 
 
 internal fun Program.checkValid(errors: IErrorReporter, compilerOptions: CompilationOptions) {
@@ -27,6 +28,20 @@ internal fun Program.processAstBeforeAsmGeneration(compilerOptions: CompilationO
     boolRemover.visit(this)
     boolRemover.applyModifications()
 
+    if(compilerOptions.compTarget.name!=VMTarget.NAME) {
+        val finder = AsmInstructionNamesFinder(compilerOptions.compTarget)
+        finder.visit(this)
+        if(finder.foundAny()) {
+            val replacer = AsmInstructionNamesReplacer(
+                finder.blocks,
+                finder.subroutines,
+                finder.variables,
+                finder.labels)
+            replacer.visit(this)
+            replacer.applyModifications()
+        }
+    }
+
     val fixer = BeforeAsmAstChanger(this, compilerOptions, errors)
     fixer.visit(this)
     while (errors.noErrors() && fixer.applyModifications() > 0) {