Re: [cc65] interrupt routine hooking in c

On Sonntag 04 Januar 2009, Ullrich von Bassewitz wrote:
> On Sun, Jan 04, 2009 at 01:43:23AM +0100, Groepaz wrote:
> > first of all, the function pointer is 16bit and goes into two adresses,
> > fffa and fffb...
> >
> > then you probably have to enable vblank interupts in some control
> > register of the videochip, check nes docs :)
>
> ... and last but not least, the generated C code is not reentrant, so your
> interrupt handler has to save registers and the zero page locations used.

that said, don't even bother writing interrupt handlers in C for the nes... 
it's to slow for anything useful, in most apps you will sooner or later want 
your own specific hardcoded irq handler anyway.

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