[Gllug] Beagle Board

Vidar Hokstad vidar at aardvarkmedia.co.uk
Wed Jan 14 10:26:42 UTC 2009


On 14 Jan 2009, at 10:01, Nix wrote:

> I see no fundamental reason why the CIA chips' timers couldn't have  
> been
> used for this purpose: they can generate interrupts, which is
> sufficient. It's not as if the (nicely hookable but otherwise  
> braindead)
> BASIC used those timers for anything.

Even the video interrupt would work fine - that was what I was  
actually originally thinking of, mainly because it needed to set up a  
video interrupt anyway to tie the sprite animation to the VBR to avoid  
flicker, but I might as well admit I'd also completely forgotten about  
the CIA timer interrupts. Probably because all I ever used myself was  
the video interrupt since my coding on the C64 was mostly demo type  
stuff full of syncing to specific raster lines, as most C64 demos..

Vidar

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