Unknown S100 system

[Jules Richardson]

Kind of posting on a whim that this might be something obvious...

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?

[1] Of course the only thing to make me think it's S100 is that the connectors 
are the right type; there's a possibility that it's some totally random bus 
specific to whatever system this is :-)

cheers

Jules