Unknown S100 system

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