Re: [cc65] simple assembly interrupt handler

From: Groepaz <groepaz1gmx.net>
Date: 2006-01-03 22:37:38
On Tuesday 03 January 2006 21:10, Ullrich von Bassewitz wrote:

> Just look at the source. From libsrc/nes/crt0.s:
> ---------------------------------------------------------------------------
> .segment "VECTORS"
>
>         .word   irq2        ; $fff4 ?
>         .word   irq1        ; $fff6 ?
>         .word   timerirq    ; $fff8 ?
>         .word   nmi         ; $fffa vblank nmi
>         .word   start       ; $fffc reset
>         .word   irq         ; $fffe irq / brk
> ---------------------------------------------------------------------------
>
> Not only there are questionmarks after the vectors, all of the labels do
> also point to an "rti" instruction.

yeah, by the time i made the NES stuff i wasnt familiar with the NES at all 
(i'm still not :=P), and i based it on some code i found on the net. so those 
could indeed be totally wrong and useless :)

-- 

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Superman.

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Received on Tue Jan 3 22:37:50 2006

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