diff --git a/.idea/libraries/Maven__info_picocli_picocli_4_2_0.xml b/.idea/libraries/Maven__info_picocli_picocli_4_5_2.xml
similarity index 68%
rename from .idea/libraries/Maven__info_picocli_picocli_4_2_0.xml
rename to .idea/libraries/Maven__info_picocli_picocli_4_5_2.xml
index c6d887975..85754e65a 100644
--- a/.idea/libraries/Maven__info_picocli_picocli_4_2_0.xml
+++ b/.idea/libraries/Maven__info_picocli_picocli_4_5_2.xml
@@ -1,13 +1,13 @@
 <component name="libraryTable">
-  <library name="Maven: info.picocli:picocli:4.2.0">
+  <library name="Maven: info.picocli:picocli:4.5.2">
     <CLASSES>
-      <root url="jar://$MAVEN_REPOSITORY$/info/picocli/picocli/4.2.0/picocli-4.2.0.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/info/picocli/picocli/4.5.2/picocli-4.5.2.jar!/" />
     </CLASSES>
     <JAVADOC>
-      <root url="jar://$MAVEN_REPOSITORY$/info/picocli/picocli/4.2.0/picocli-4.2.0-javadoc.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/info/picocli/picocli/4.5.2/picocli-4.5.2-javadoc.jar!/" />
     </JAVADOC>
     <SOURCES>
-      <root url="jar://$MAVEN_REPOSITORY$/info/picocli/picocli/4.2.0/picocli-4.2.0-sources.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/info/picocli/picocli/4.5.2/picocli-4.5.2-sources.jar!/" />
     </SOURCES>
   </library>
 </component>
\ No newline at end of file
diff --git a/kickc.iml b/kickc.iml
index 0468924bf..8e57f98ea 100644
--- a/kickc.iml
+++ b/kickc.iml
@@ -23,7 +23,7 @@
     <orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-commons:1.6.2" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-api:5.6.2" level="project" />
     <orderEntry type="library" name="Maven: cml.kickass:kickassembler:5.16-65ce02.h" level="project" />
-    <orderEntry type="library" name="Maven: info.picocli:picocli:4.2.0" level="project" />
+    <orderEntry type="library" name="Maven: info.picocli:picocli:4.5.2" level="project" />
     <orderEntry type="library" name="Maven: javax.json:javax.json-api:1.1.4" level="project" />
     <orderEntry type="library" name="Maven: org.glassfish:javax.json:1.1.4" level="project" />
   </component>
diff --git a/pom.xml b/pom.xml
index d69b6c4c9..10d475aad 100644
--- a/pom.xml
+++ b/pom.xml
@@ -49,7 +49,7 @@
         <dependency>
             <groupId>info.picocli</groupId>
             <artifactId>picocli</artifactId>
-            <version>4.2.0</version>
+            <version>4.5.2</version>
         </dependency>
         <dependency>
             <groupId>javax.json</groupId>
diff --git a/src/main/fragment/cache/fragment-cache-mos6502x.asm b/src/main/fragment/cache/fragment-cache-mos6502x.asm
index e58058f69..a262c04d6 100644
--- a/src/main/fragment/cache/fragment-cache-mos6502x.asm
+++ b/src/main/fragment/cache/fragment-cache-mos6502x.asm
@@ -19956,3 +19956,16 @@ bne !-
 clc
 adc #2
 sta {z1}
+//FRAGMENT vbuz1=pbuc1_derefidx_vbum2
+ldy {m2}
+lda {c1},y
+sta {z1}
+//FRAGMENT vbuaa=pbuc1_derefidx_vbum1
+ldy {m1}
+lda {c1},y
+//FRAGMENT vbuxx=pbuc1_derefidx_vbum1
+ldy {m1}
+ldx {c1},y
+//FRAGMENT vbuyy=pbuc1_derefidx_vbum1
+ldx {m1}
+ldy {c1},x
diff --git a/src/main/java/dk/camelot64/kickc/KickC.java b/src/main/java/dk/camelot64/kickc/KickC.java
index a139e92ca..175eab9e4 100644
--- a/src/main/java/dk/camelot64/kickc/KickC.java
+++ b/src/main/java/dk/camelot64/kickc/KickC.java
@@ -53,6 +53,9 @@ public class KickC implements Callable<Integer> {
    @CommandLine.Option(names = {"-a"}, description = "Assemble the output file using KickAssembler. Produces a binary file.")
    private boolean assemble = false;
 
+   @CommandLine.Option(names = {"-Xassembler"}, description = "Passes the next option to the assembler. The option should generally be quoted. This option can be repeated to pass multiple options.")
+   private List<String> assemblerOptions = null;
+
    @CommandLine.Option(names = {"-e"}, description = "Execute the assembled binary file using an appropriate emulator. The emulator chosen depends on the target platform.")
    private boolean execute = false;
 
@@ -181,6 +184,8 @@ public class KickC implements Callable<Integer> {
 
    public static void main(String[] args) {
       final CommandLine commandLine = new CommandLine(new KickC());
+      commandLine.setTrimQuotes(true);
+      commandLine.setUnmatchedOptionsAllowedAsOptionParameters(true);
       final int exitCode = commandLine.execute(args);
       System.exit(exitCode);
    }
@@ -438,6 +443,10 @@ public class KickC implements Callable<Integer> {
             assembleCommand.add("-vicesymbols");
             assembleCommand.add("-showmem");
             assembleCommand.add("-debugdump");
+            // Add passed options
+            if(assemblerOptions !=null)
+               assembleCommand.addAll(assemblerOptions);
+
             if(verbose) {
                System.out.print("Assembling command: java -jar KickAss.jar ");
                for(String cmd : assembleCommand) {
@@ -465,7 +474,6 @@ public class KickC implements Callable<Integer> {
 
          // Execute the binary file if instructed
          if(emulator != null) {
-
             // Find commandline options for the emulator
             String emuOptions = "";
             if(emulator.equals("C64Debugger")) {
@@ -478,7 +486,6 @@ public class KickC implements Callable<Integer> {
                Path viceSymbolsPath = outputDir.resolve(outputFileNameBase + ".vs");
                emuOptions = "-moncommands " + viceSymbolsPath.toAbsolutePath().toString() + " ";
             }
-
             System.out.println("Executing " + outputBinaryFilePath + " using " + emulator);
             String executeCommand = emulator + " " + emuOptions + outputBinaryFilePath.toAbsolutePath().toString();
             if(verbose) {