--- Gary Dean Hildebrand <ghldbrd_at_ccp.com> wrote:
> Ethan Dicks writes:
> > I don't recall if that is one of the models or not, but some C= PSUs
> > provide 60Hz "tick" to the CIAs (some, like the A500, do not).
> The 60Hz 'tick' was on the old CBM 8 bit machines. They had a seperate
> 10vAC input that was tapped for that, as well as provide 12 volts for the
> analog circuitry.
Not only the 8-bit machines. The A1000 and A2000 provided 'tick' to
their boards. The A2000 could be jumpered to not require it (I have
done so for my A2000 in a Bomac (sp?) tower case that I've fitted a
PeeCee PSU in.
The A4000 does not provide tick. I didn't remember about the A3000.
> The A500 PS only provided DC voltages.
That much is certainly true.
-ethan
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Received on Tue Apr 15 2003 - 23:34:00 BST