Re: CIA old/new?

From: groepaz_at_gmx.net
Date: Fri, 08 Jan 2021 19:34:00 +0100
Message-ID: <3652811.nE6jSC6OKo_at_rakete>
Am Freitag, 8. Januar 2021, 19:21:52 CET schrieb Segher Boessenkool:
> > If we exclude on-chip propagation times then there has to be something
> > else that "matters" because with the same external timing, still only
> > (some) HMOS-II chips expose the problem.
> I have seen no proof of that claim, btw -- of course it is hard to show
> supporting evidence for a negative claim, it will need a lot of
> independent observations.

It can certainly be observed using a C64RMK2 board... "old" VICII never shows
the grey dots in it, "new" VICII will (mostly) show them, with a tendency for
them to disappear when the chip warms up.

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Received on 2021-01-08 20:02:32

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