RE: Theorizing: chip select lines as clock speed selectors in a overclocked 6510 on a C64

From: Baltissen, GJPAA (Ruud) <"Baltissen,>
Date: Thu, 30 Jun 2022 05:37:23 +0000
Message-ID: <PAXPR10MB55208863DCBD509295FF4EC1E1BA9_at_PAXPR10MB5520.EURPRD10.PROD.OUTLOOK.COM>
> Still, his strong advice was not to rely on DOTCLOCK keeping its relation to other ones, which was/is crucial for proper BR operations.

One thing you can do is to dream up a circuit that halts whatever wants to access the C64/128 until a _complete_ top half of PHI2 has been detected. I have used that idea in on old project: http://www.baltissen.org/newhtm/x_dma.htm . Feel free to use it.


With kind regards / Met vriendelijke groet, Ruud Baltissen

http://www.baltissen.org








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Received on 2022-06-30 08:00:02

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