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MEGA65: Switch "zero page" to $1600 - $16ff #315

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MEGA65: Switch "zero page" to $1600 - $16ff #315

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4 changes: 4 additions & 0 deletions mos-platform/mega65/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -16,3 +16,7 @@ add_platform_object_file(mega65-unmap-basic unmap-basic.o unmap-basic.S)

add_platform_library(mega65-c kernal.S)
target_include_directories(mega65-c BEFORE PUBLIC .)

target_compile_options(mega65-unmap-basic PRIVATE
-mcpu=mos45gs02
)
8 changes: 6 additions & 2 deletions mos-platform/mega65/unmap-basic.S
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,9 @@
ldx #$44 ; unmap all C65 ROMs except $e000-$ffff
stx $d030

lda #$16 ; Switch zero page to $1600 - $16ff
tab


; restore BASIC ROM after all other exit handlers have completed
.section .fini.990,"axR", @progbits
Expand All @@ -24,7 +27,8 @@
; restore C65 ROMs to as before
ldx #$64
stx $d030

lda #$00 ; Switch zero page back to default
tab

cli