[CCTECH] Cards to Identify

Ethan, yes, I also remember having seen PDP-11/VAX peripherals controlled by a 68000. However, with this board, I am not quite sure if it is Qbus or UNIBUS at all. I'd have to trace the connections, but before doing so, my suspicion is that this was some different kind of system with the Motorola centipede being the main processor. And, no, I did not notice any particular driver chips like the 1488/1489 (or maybe 75188/75189, or some of those 8-pin chips from the DLV-11/J, or...). The absence of such chips together with the large number of pins makes me think this might be a separate memory bus, similar to what the MicroVAX II had. On the other hand, it is still possible that there once was another part of the subsystem, like a distribution panel, which may have included the level shifter chips. But then again, there are no other large chips, other than those mentioned, on the board. Everything else is like SN74... Sorry for making the task of guessing so hard, I think it's time to get a digital camera. I hesitate because I don't have access to any computer with a working USB to upload the pics, and this application alone wouldn't justify buying Win2000. Andreas Ethan Dicks wrote: -- Andreas Freiherr Vishay Semiconductor GmbH, Heilbronn, Germany http://www.vishay.com