Re: Disk drive timing

From: Andre Fachat (
Date: 1998-08-24 12:49:14

Stephen Judd wrote:
> In part I was wondering if this is a trial and error kind of thing, or
> if a more precise calculation may be applied, e.g. for every x cycles,
> add y cycles.  My naive MHz calculation says that around 50 drive cycles 
> is about 51 NTSC cycles (or 49 PAL cycles) -- in other words, that

If you are doign a fastloader, you better switch off the screen,
as teh VIC stops the CPU for a number of cycles every 8 rasterlines
to fetch new character data.

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Andre Fachat, Institute of physics, Technische Universitšt Chemnitz, FRG
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