From 8fbe13f99d166184ddbc1cf685957f323b1f9bd9 Mon Sep 17 00:00:00 2001
From: Irmen de Jong <irmen@razorvine.net>
Date: Fri, 29 Sep 2023 00:28:04 +0200
Subject: [PATCH] c64: $a5 removed from free ZP (it's actually used by kernal
 disk routines)

---
 codeCore/src/prog8/code/target/c64/C64Zeropage.kt | 4 ++--
 docs/source/todo.rst                              | 1 -
 examples/test.p8                                  | 6 ++++++
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/codeCore/src/prog8/code/target/c64/C64Zeropage.kt b/codeCore/src/prog8/code/target/c64/C64Zeropage.kt
index dd3e70ac7..5f3bd194b 100644
--- a/codeCore/src/prog8/code/target/c64/C64Zeropage.kt
+++ b/codeCore/src/prog8/code/target/c64/C64Zeropage.kt
@@ -53,11 +53,11 @@ class C64Zeropage(options: CompilationOptions) : Zeropage(options) {
                 ).map{it.toUInt()})
             }
 
-            if(options.zeropage!= ZeropageType.DONTUSE) {
+            if(options.zeropage != ZeropageType.DONTUSE) {
                 // add the free Zp addresses
                 // these are valid for the C-64 but allow BASIC to keep running fully *as long as you don't use tape I/O*
                 free.addAll(listOf(0x02, 0x03, 0x04, 0x05, 0x06, 0x0a, 0x0e,
-                        0x92, 0x96, 0x9b, 0x9c, 0x9e, 0x9f, 0xa5, 0xa6,
+                        0x92, 0x96, 0x9b, 0x9c, 0x9e, 0x9f, 0xa6,
                         0xb0, 0xb1, 0xbe, 0xbf, 0xf9).map{it.toUInt()})
             } else {
                 // don't use the zeropage at all
diff --git a/docs/source/todo.rst b/docs/source/todo.rst
index 8676f8bee..8ed18b5fc 100644
--- a/docs/source/todo.rst
+++ b/docs/source/todo.rst
@@ -1,7 +1,6 @@
 TODO
 ====
 
-- fix c64 diskio.f_write optimizer issue (in test.p8)
 - why is petscii \n translated to $8d and not $0d?  and \r IS translated to $0d?
 - add a compiler switch to replace all calls to the math word mul routine on the X16 by the verafx call instead.
 - [on branch: shortcircuit] investigate McCarthy evaluation again? this may also reduce code size perhaps for things like if a>4 or a<2 ....
diff --git a/examples/test.p8 b/examples/test.p8
index 3a75d4feb..216f17f09 100644
--- a/examples/test.p8
+++ b/examples/test.p8
@@ -7,6 +7,12 @@
 
 main {
     sub start() {
+        txt.print("\\r=")
+        txt.print_ub('\r')
+        txt.print(" and \\n=")
+        txt.print_ub('\n')
+        txt.nl()
+
         ubyte[256] buf
 
         void diskio.delete("lines.txt")