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| From: Rachy (all posts)
Date: 2001-07-25
Subject: Re: interrupt
|
Hello!
On 24 Jul 2001, at 15:05, Hársfalvi Levente wrote:
> Yes it should do like that, as far as I'm concerned. The IRQ line
> remains asserted as long as there's at least one pending IRQ. Now,
But it means, that this code will not work:
SEI
STA $FF3F
LDA #$00
STA $FFFE
STA $FFFF
LDA #$08
STA $FF0A
LDA #$20
STA $FF00
LDA #$00
STA $FF01
LDY #$00 ;To make sure an interrupt triggered b: LDX #$00
a: DEX
BNE a
DEY
BNE b
CLI
LDA #<irq
STA $FFFE
LDA #>irq
STA $FFFF c: JMP c
irq: ASL$FF09
RTI
I don't know if this piece of code does work on a real machine, but I think it would.
What is your opinion?
By:
Almos Rajnai
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| Rachy of Bi0Hazard | PowerAmiga owner | http://amigos.amiga.hu/rachy/ |
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