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add CHARGEN_RELOC knob to conditionally include the code to change CHBASE

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Christian Groessler
2013-09-19 23:34:45 +02:00
parent 60e97f4d96
commit fe75788015
1 changed files with 13 additions and 2 deletions
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15
libsrc/atari/romswitch.inc
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@@ -7,9 +7,10 @@
.ifdef __ATARIXL__
USEWSYNC= 1
USEWSYNC = 1
CHARGEN_RELOC = 1
.if USEWSYNC
.if .defined(USEWSYNC) .and .defined(CHARGEN_RELOC)
.macro wsync
sta WSYNC
.endmacro
@@ -24,25 +25,31 @@ USEWSYNC= 1
and #$fe
wsync
sta PORTB
.ifdef CHARGEN_RELOC
lda #>__CHARGEN_START__
sta CHBAS
sta CHBASE
.endif
.endmacro
.macro disable_rom_quick
lda PORTB
and #$fe
sta PORTB
.ifdef CHARGEN_RELOC
lda #>__CHARGEN_START__
sta CHBAS
sta CHBASE
.endif
.endmacro
.macro disable_rom_val val
lda val
wsync
sta PORTB
.ifdef CHARGEN_RELOC
lda #>__CHARGEN_START__
sta CHBAS
sta CHBASE
.endif
.endmacro
.macro enable_rom
@@ -50,17 +57,21 @@ USEWSYNC= 1
ora #1
wsync
sta PORTB
.ifdef CHARGEN_RELOC
lda #$E0
sta CHBAS
sta CHBASE
.endif
.endmacro
.macro enable_rom_quick
lda PORTB
ora #1
sta PORTB
.ifdef CHARGEN_RELOC
lda #$E0
sta CHBAS
sta CHBASE
.endif
.endmacro
.else ; above __ATARIXL__, below not