Re: Article PC-card

From: William Levak (wlevak_at_cyberspace.org)
Date: 2001-04-05 00:37:40

On Wed, 4 Apr 2001, Ruud Baltissen wrote:

> > What parts of the VIC-20 steal cycles from 6502?  :-/
> 
> I'm not sure if the VIC chip steals cycles but it at least needs to access
> the video- and colorRAM to build up a screen. And just for this reason alone
> it needs to be able to master the bus.

There are actually 2 busses in the VIC-20, the video bus and the CPU bus.
They are connected by a pair of 74LS245 buffers.



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