Unknown S100 system

[Barry Watzman]

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
actually seen).

>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 [1] 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?