12 Nov
2005
12 Nov
'05
11:47 p.m.
Subject: Collectables?
From: "Chuck Guzis" <cclist at sydex.com>
Date: Sat, 12 Nov 2005 15:03:55 -0800
To: cctalk at classiccmp.org
I just found an unused bare S-100 backplane PCB marked "EXP-4 Rev. 2" and
"(C) 1975, IMS Assoc. Inc.". I'm assuming that it's for the IMSAI
8080,
but am not certain.
I've also discovered a bare Polymorphic Systems backplane from about the
same time. I'll throw in the 4 edge connectors that were taped to it. It
has pads for rectifiers, caps and what looks like a regulator on it.
Let me know if you're interested.
I'm building a small 4 board s100 system, the usual Z80, Memory, IO and disk.
The Polymorphic sounds nice for that project. The IMS is too big if it's
their usual more than 12 slot backplane. I'd take both though depending
on price.
Allison
13 Nov
13 Nov
2:07 a.m.
Let me be clear on the IMS backplane--it's not a 12-slot model, but a
4-slot version. It appears to be factory-engineered this way and a glance
at the rails in my Altair 8800 appears to say that this was intended for
incorporation into a MITS box and not the IMS box. Connection is obviously
the MITS wire-by-wire method, not the IMS edge connector.
I hadn't realized that IMS made add-ons for the MITS boxes, but here you
have one.
Cheers,
Chuck
6985
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