20 Dec
2001
20 Dec
'01
1:52 p.m.
--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote:
Well... standard in one sense - things like the 6522 were available
I never had
that problem personally, but I can see how it could be a
concern. I always liked the PET/C-64 partially because the custom
chips afforded a feature set at a price lower than other machines (like
I am now trying to think of a single 'custom chip', other than ROMs, in
any normal PET (not PET-II or anything like that). From what I remember
of repairing 2001s and 8032s, it's all standard components in there. from multiple vendors, but they certainly weren't
the popcorn logic
of an Apple ][. Since the 6520s and 6522s and 6530s, etc., that
were
common to those machines came from the MOS fabs, I was sort-of counting
them as "custom" chips. I suppose I could have overgeneralized.
Has anybody ever read that chip out and recreated the
logic equations? It
shouldn't be hard to do....
I don't know about the equations, but ISTR there's a programmer-ready
file on funet (as I mentioned in another posting on this topic).
-ethan
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