From: David Wood (jbevren_at_starbase.globalpc.net)
Date: 2004-02-06 13:18:02
You know, youre exactly right. Thanks for the correction :-P
-jbev
On Fri, 6 Feb 2004, Marko [iso-8859-1] Mäkelä wrote:
> On Fri, Feb 06, 2004 at 05:34:52AM -0600, David Wood wrote:
> > The only real reason to use clock stretching is because the cpu doesn't
> > support wait states. Most modern cpu's (even the z80) support wait states
> > so that a slow IO device can hold the cpu captive while the requested data
> > is presented.
>
> Hmm, what is the RDY input then? Couldn't it be used for implementing wait
> states? If yes, why didn't Commodore use it for anything else than blocking
> the processor during DMA? On the C64 and C128, the RDY input can be affected
> by altering the -DMA input of the cartridge port.
>
> Marko
>
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>
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