2 Jul
2004
2 Jul
'04
6:16 a.m.
Hi Marvin & Jules
Yep, that is the polymorphic CPU card. The CPU is a 8080 and
the 4 sockets above the CPU are for 2111's. The three sockets
take 2708's. It is missing things like bus buffers. Marvin
or I can get you a schematic. If you get one of the vidio cards
and a parallel keyboard, you can actually do a small amount
( with the 4 2111's as RAM ). The two socket at the upper
right go to a serial buffer card and a cassette interface card.
I do have the schematic for these as well but the cassette has
a couple of chips that may be a real bear to find.
I also have the ROM monitor code and TINY BASIC that will
run on this card.
Dwight
From: "Marvin Johnston"
<marvin(a)rain.org>
I *think* this is a Polymorphic CPU card, but I can't get to any of the
cards right now to make sure. IIRC, IPC was the company name that was
associated with Polymorphic Systems, and that name appears on most, if
not all, of their S-100 cards. In checking some of the Polymorphic
engineering drawings, I.P.C. showed up the one PC Board layout I found.
Jules Richardson wrote:
On Thu, 2004-07-01 at 20:16, Jules Richardson wrote:
Random S100 board in the pile. Says "(c)1976
I.P.C" on the underside,
but there's nothing else by way of identification.
I've put a small photo up at:
http://www.moosenet.demon.co.uk/temp/comps/s100/unknown_s100_sm.jpg
any ideas?
cheers,
Jules 