I remember seeing these used to develop embedded microprocessor systems for applications like industrial control, back in 1979. I was using a Kontron development system then so I didn't use the EXORcisor firsthand. As I recall, it had a backplane that accepted cards from Motorola and a few 3rd-party manufacturers (cpu, memory, serial ports, etc). The cards had dimensions similar to S-100 but were 86-pin or something like that, and of course the bus incorporated more 6800-ish signals, like the E clock signal used to synchronize bus events. The idea was that you could run the EXORcisor itself as a general-purpose computer (monitor, editor, assembler, Basic, and so on--running on top of a proprietary Motorola OS that I can't recall) and you could stuff in any special boards you were developing for your application and so integrate them into your software development. When you had the code debugged, you'd blow an eprom, pull the boards out and stuff them into their own cabinet, insert the eprom, and start up your embedded system independent of the EXORcisor. One interesting thing was that many of Motorola's standalone (KIM-like) single-board computer "development kits" like the "D2" had the same EXORcisor bus connector and you could easily mix-and-match those boards with standard EXORcisor cards. I have a couple of EXORcisor cards somewhere (a Burr-Brown D to A card, some memory boards I think?) but no EXORcisor and no documents. So if you have documentation I'd like to take advantage and get copies of the relevant schematics, etc. I also think I have a couple of ROMs containing Motorola Basic that would probably work if plugged into an EXORcisor memory card. The system you've got probably sold for upwards of $20K back then. This was state-of-the-art professional gear, so admiration and respect are warranted :) Arlen -- Arlen Michaels amichael(a)nortelnetworks.com