Re: 264 series questions

From: Marko Mäkelä (
Date: 1999-10-05 19:45:55

On Tue, 5 Oct 1999, Nicolas Welte wrote:

> I know. But on the C128 it's even worse than this, because clock
> stretching occurs on only some I/O accesses.

Isn't it only when the I/O access would happen in VIC-IIe's cycle half?  I
never had any difficulties with that.

> So you never really know if an I/O access at 2MHz speed takes one or
> two cycles.

You must just know the context, that's all.  And after an I/O access you
will be sure that the next instruction will start on a "normal" cycle,
i.e. not on the half that was stolen from the video chip.


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