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Add indication on the screen of occurring IRQs and NMIs (only for debug version).

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NMI handler: set I status bit to original value before interrupt before chaining
to ROM NMI handler.
This commit is contained in:
Christian Groessler 2013-06-18 13:00:51 +02:00
parent c79b23e95b
commit 47d16e86a4
1 changed files with 42 additions and 0 deletions
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42
libsrc/atari/shadow_ram_handlers.s
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@ -4,6 +4,7 @@
; Christian Groessler, chris@groessler.org, 2013
;
DEBUG = 1
.if .defined(__ATARIXL__)
@ -132,9 +133,50 @@ ret: disable_rom
.endmacro
my_IRQ_han:
.ifdef DEBUG
php
pha
tya
pha
ldy #0
lda (SAVMSC),y
clc
adc #1
sta (SAVMSC),y
pla
tay
pla
plp
.endif
int_wrap IRQ_save
my_NMI_han:
.ifdef DEBUG
php
pha
tya
pha
ldy #39
lda (SAVMSC),y
clc
adc #1
sta (SAVMSC),y
pla
tay
pla
plp
.endif
; set I bit to interrupted value
pha
txa
pha
tsx
lda $103,x
pha
plp
pla
tax
pla
int_wrap NMI_save
my_RESET_han: