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changes for atarixl target

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This commit is contained in:
Christian Groessler 2013-08-26 10:36:40 +02:00
parent e4c934b6f5
commit a3511ea93d
1 changed files with 33 additions and 1 deletions
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34
libsrc/atari/ostype.s
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@ -41,11 +41,41 @@
.export _get_ostype
.if .defined(__ATARIXL__)
.warning "fix me!"
.include "atari.inc"
.import __CHARGEN_START__
.segment "LOWCODE"
.macro disable_rom
pha
lda PORTB
and #$fe
sta PORTB
lda #>__CHARGEN_START__
sta CHBAS
sta CHBASE
pla
.endmacro
.macro enable_rom
lda PORTB
ora #1
sta PORTB
lda #$E0
sta CHBAS
sta CHBASE
.endmacro
.else ; above atarixl, below atari
.macro disable_rom
.endmacro
.macro enable_rom
.endmacro
.endif
.proc _get_ostype
enable_rom
lda $fcd8
cmp #$a2
beq _400800
@ -67,6 +97,7 @@
and #%00111000
ora #%11
_fin: ldx #0
disable_rom
rts
; unknown ROM
@ -74,6 +105,7 @@ _fin: ldx #0
_unknown:
lda #0
tax
disable_rom
rts
; 1200XL ROM