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cc65/libsrc/atari/irq.s

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Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81
2013-02-12 22:39:38 +00:00
;
; IRQ handling (ATARI version)
;
Removed (pretty inconsistently used) tab chars from source code base.
2013-05-09 11:56:54 +00:00
.export initirq, doneirq
.import callirq
Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81
2013-02-12 22:39:38 +00:00
Removed (pretty inconsistently used) tab chars from source code base.
2013-05-09 11:56:54 +00:00
.include "atari.inc"
adapt to CHARGEN_RELOC
2013-09-20 16:09:53 +00:00
.ifdef __ATARIXL__
.import __CHARGEN_START__
.include "romswitch.inc"
.endif
Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81
2013-02-12 22:39:38 +00:00
; ------------------------------------------------------------------------
Removed (pretty inconsistently used) tab chars from source code base.
2013-05-09 11:56:54 +00:00
.segment "INIT"
Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81
2013-02-12 22:39:38 +00:00
initirq:
Use deferred VBI instead of immediate VBI. A deferred VBI won't be called if the user program has interrupts disabled which makes it easier to avoid race conditions.
2014-01-02 20:45:12 +00:00
lda VVBLKD
ldx VVBLKD+1
Removed (pretty inconsistently used) tab chars from source code base.
2013-05-09 11:56:54 +00:00
sta IRQInd+1
stx IRQInd+2
Use deferred VBI instead of immediate VBI. A deferred VBI won't be called if the user program has interrupts disabled which makes it easier to avoid race conditions.
2014-01-02 20:45:12 +00:00
lda #7
Removed (pretty inconsistently used) tab chars from source code base.
2013-05-09 11:56:54 +00:00
ldy #<IRQStub
ldx #>IRQStub
jsr SETVBV
rts
Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81
2013-02-12 22:39:38 +00:00
; ------------------------------------------------------------------------
.code
doneirq:
Use deferred VBI instead of immediate VBI. A deferred VBI won't be called if the user program has interrupts disabled which makes it easier to avoid race conditions.
2014-01-02 20:45:12 +00:00
lda #7
Removed (pretty inconsistently used) tab chars from source code base.
2013-05-09 11:56:54 +00:00
ldy IRQInd+1
ldx IRQInd+2
jsr SETVBV
rts
Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81
2013-02-12 22:39:38 +00:00
; ------------------------------------------------------------------------
Removed (pretty inconsistently used) tab chars from source code base.
2013-05-09 11:56:54 +00:00
.segment "LOWCODE"
Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81
2013-02-12 22:39:38 +00:00
IRQStub:
Removed (pretty inconsistently used) tab chars from source code base.
2013-05-09 11:56:54 +00:00
cld ; Just to be sure
Use '.ifdef' and '.ifndef' instead of '.if .defined' and '.if .not .defined'.
2013-09-19 20:36:22 +00:00
.ifdef __ATARIXL__
adapt to CHARGEN_RELOC
2013-09-20 16:09:53 +00:00
.ifdef CHARGEN_RELOC
lda CHBAS
pha
.endif
lda PORTB
pha
Some formatting and style fixes.
2013-10-01 09:32:08 +00:00
and #$FE
adapt to CHARGEN_RELOC
2013-09-20 16:09:53 +00:00
sta PORTB ; disable ROM
set_chbase >__CHARGEN_START__
atarixl target: add support for interruptors, adapt TGI drivers
2013-08-25 09:20:27 +00:00
.endif
Removed (pretty inconsistently used) tab chars from source code base.
2013-05-09 11:56:54 +00:00
jsr callirq ; Call the functions
Use '.ifdef' and '.ifndef' instead of '.if .defined' and '.if .not .defined'.
2013-09-19 20:36:22 +00:00
.ifdef __ATARIXL__
adapt to CHARGEN_RELOC
2013-09-20 16:09:53 +00:00
pla
sta PORTB ; restore old ROM setting
.ifdef CHARGEN_RELOC
pla
sta CHBAS
sta CHBASE
.endif
atarixl target: add support for interruptors, adapt TGI drivers
2013-08-25 09:20:27 +00:00
.endif
Removed (pretty inconsistently used) tab chars from source code base.
2013-05-09 11:56:54 +00:00
jmp IRQInd ; Jump to the saved IRQ vector
Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81
2013-02-12 22:39:38 +00:00
; ------------------------------------------------------------------------
.data
Removed (pretty inconsistently used) tab chars from source code base.
2013-05-09 11:56:54 +00:00
IRQInd: jmp $0000
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