The board normally ran with an 8 MHZ clock with some 10 MHZ versions. (Remember the clock in 6800x chips was ~2X the Intel chips). The two empty sockets could accommodate 2716, 2732 or 2764 EPROMS in a high/low byte arrangement.

The challenge for Motorola CPU's was there was no separate I/O signals. CompuPro mapped the 256 I/O ports to addresses FF0000H to FFFFFFH. Only the lower 8 bits were normally used.   One unusual thing about the board was CompuPro allowed the S-100 master clock signal (#24) to be disabled by a signal on pin 21. This allowed slower slave processors to run on the bus at a lower speed.  The board also allowed up to 5 wait states be put on the bus.

The 68000 had a built in seven level priority interrupt structure this made splicing it to an external interrupt controller on the bus a little tricky. CompuPro provided a few options on this board.  There was a large empty socket in the center of the board that was used to add an optional 68451 memory management chip.

I cannot locate a good picture.  If you can contribute please let me know.

The schematic for this board can be obtained here.  The technical manual can be obtained here.