Re: [cc65] interrupt routine hooking in c

From: Ullrich von Bassewitz <>
Date: 2009-01-04 20:19:58
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.



Ullrich von Bassewitz                        
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Received on Sun Jan 4 20:22:31 2009

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