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
parent 1607b05104
commit 7c9171ee87
36 changed files with 886 additions and 732 deletions
--- a/libsrc/atari/irq.s
+++ b/libsrc/atari/irq.s
@@ -0,0 +1,49 @@
+;
+; IRQ handling (ATARI version)
+;
+
+	.export		initirq, doneirq
+	.import		callirq
+
+	.include	"atari.inc"
+
+; ------------------------------------------------------------------------
+
+.segment	"INIT"
+
+initirq:
+	lda	VVBLKI
+	ldx	VVBLKI+1
+	sta	IRQInd+1
+	stx	IRQInd+2
+	lda	#6
+	ldy	#<IRQStub
+	ldx	#>IRQStub
+	jsr	SETVBV
+	rts
+
+; ------------------------------------------------------------------------
+
+.code
+
+doneirq:
+	lda	#6
+	ldy	IRQInd+1
+	ldx	IRQInd+2
+	jsr	SETVBV
+	rts
+
+; ------------------------------------------------------------------------
+
+.segment	"LOWCODE"
+
+IRQStub:
+	cld				; Just to be sure
+	jsr	callirq			; Call the functions
+	jmp	IRQInd			; Jump to the saved IRQ vector
+
+; ------------------------------------------------------------------------
+
+.data
+
+IRQInd: jmp	$0000