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adapt to CHARGEN_RELOC

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This commit is contained in:
Christian Groessler 2013-09-20 18:09:53 +02:00
parent 722dbaa1aa
commit 34e75afec3
1 changed files with 22 additions and 8 deletions
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30
libsrc/atari/irq.s
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@ -6,6 +6,10 @@
.import callirq
.include "atari.inc"
.ifdef __ATARIXL__
.import __CHARGEN_START__
.include "romswitch.inc"
.endif
; ------------------------------------------------------------------------
@ -40,17 +44,27 @@ doneirq:
IRQStub:
cld ; Just to be sure
.ifdef __ATARIXL__
pha
lda PORTB
pha
and #$fe
sta PORTB ; disable ROM @@@ TODO: update CHARGEN
pha
.ifdef CHARGEN_RELOC
lda CHBAS
pha
.endif
lda PORTB
pha
and #$fe
sta PORTB ; disable ROM
set_chbase >__CHARGEN_START__
.endif
jsr callirq ; Call the functions
.ifdef __ATARIXL__
pla
sta PORTB
pla
pla
sta PORTB ; restore old ROM setting
.ifdef CHARGEN_RELOC
pla
sta CHBAS
sta CHBASE
.endif
pla
.endif
jmp IRQInd ; Jump to the saved IRQ vector