Unknown S100 system
Watzman at neo.rr.com
Sat Sep 22 18:27:12 CDT 2007
Your description fits PERFECTLY a Heathkit / Zenith Data Systems Z-100
series computer (actually, Z-110 or Z-120 series). I am sure, from you
description, that this is what it was. It's actually a very common system
as S-100 systems go .... about 100,000 were built, five to ten times more
than Imsai or SOL-20 systems.
>All of the S100 systems I've seen to date have comprised a backplane
>and then cards for various system components - including CPU and
>memory. However, I unearthed one today which held much of the system
>logic on the backplane itself (i.e. more like a modern-day PC
>motherboard - I'd heard such things existed, but this is the first one I've
>Unfortunately I forgot to bring the thing home with me, so I'm a bit
>light on remembered details (but can get more tomorrow if needs be).
>However, it appeared to have both an 8088 and 8085 CPU on board,
>memory, what is probably ROM, a handful of S100-bus  connectors,
>parallel port, a light-pen port (unusual!), plus a few other ports (at
>least one was serial I expect). There were a few other IDC-style pin
>headers too - perhaps for some sort of storage, but none of them were
obviously labeled as to function.
>Sound familiar to anyone?
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