c64 system reset now banks kernel rom back in

compiler/src/prog8/compiler/target/CompilationTarget.kt

@@ -35,7 +35,7 @@ internal object C64Target: CompilationTarget {
             if(altEncoding) Petscii.decodeScreencode(bytes, true) else Petscii.decodePetscii(bytes, true)
     override fun asmGenerator(program: Program, errors: ErrorReporter, zp: Zeropage, options: CompilationOptions, path: Path) =
             AsmGen(program, errors, zp, options, path)
-    override val asmForSystemReset = "  sei |  jmp  (c64.RESET_VEC)"        // TODO enable kernal rom bank
+    override val asmForSystemReset = "  sei |  lda  #14 |  sta  $1 |  jmp  (c64.RESET_VEC)"
     override val initProcName = "c64.init_system"
 }
 

examples/test.p8

@@ -1,8 +1,7 @@
 %import c64textio
 ;%import c64flt
 ;%option enable_floats
-%zeropage basicsafe
-; TODO system reset should also work when kernal is paged out
+%zeropage kernalsafe
 
 
 main {
@@ -10,20 +9,23 @@ main {
 
     sub start() {
 
-        uword ub1
-        word  ww1
-        uword ii
+        %asm {{
+            sei
+            ldy  #0
+            sty  $1
+            lda  #0
+-           sta  $f000,y
+            iny
+            bne  -
+-           lda  $f000,y
+            sta  $0400,y
+            iny
+            bne  -
+        }}
 
-        for ii in 0 to 20 {
-            ; ub1 = ii
-            ; ub1 *= 40       ; TODO implement non-stack optimized muls
-            ; todo a = EXPRESSION * const -> is that optimized?
-            ub1 = ii * 15
-            txt.print_uw(ub1)
-            c64.CHROUT(',')
-            ub1 = 1+(ii * 15)
-            txt.print_uw(ub1)
-            c64.CHROUT('\n')
+        repeat 60000 {
+            ubyte a = sin (3)
+            a++
         }
 
 ;asmsub  clear_screen (ubyte char @ A, ubyte color @ Y) clobbers(A)  { ...}