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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.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
ol.sc
2013-02-12 22:39:38 +00:00
parent 1607b05104
commit 7c9171ee87
36 changed files with 886 additions and 732 deletions
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29
libsrc/runtime/callirq.s
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@@ -27,13 +27,18 @@
; entries.
;
.export callirq
.export callirq_y ; Same but with Y preloaded
.export __CALLIRQ__: absolute = 1
.import __INTERRUPTOR_TABLE__, __INTERRUPTOR_COUNT__
.export callirq
.export callirq_y ; Same but with Y preloaded
.export __CALLIRQ__ : absolute = 1
.constructor irq_init, 10
.destructor irq_done, 10
.code
.import __INTERRUPTOR_TABLE__, __INTERRUPTOR_COUNT__
.import initirq
.import doneirq
irq_init := initirq
irq_done := doneirq
; --------------------------------------------------------------------------
; Call all IRQ routines. The function needs to use self modifying code and
@@ -51,14 +56,12 @@ callirq_y:
loop: dey
lda __INTERRUPTOR_TABLE__,y
sta jmpvec+2 ; Modify code below
dey
dey
lda __INTERRUPTOR_TABLE__,y
sta jmpvec+1 ; Modify code below
sty index+1 ; Modify code below
jmpvec: jsr $FFFF ; Patched at runtime
sty index+1 ; Modify code below
jmpvec: jsr $FFFF ; Patched at runtime
bcs done ; Bail out if interrupt handled
index: ldy #$FF ; Patched at runtime
bne loop
index: ldy #$FF ; Patched at runtime
bne loop
done: rts