Rolm Computers: 1602, 1602A, 1602B, 1666, MSExx (was Data General Nova Star Trek)

IIRC the most interesting thing about the CBX was that it could do so much with so little hardware (relative to other switches of the time) thanks to TDM of the 12-bit bus through the "connection table", which was a 384 slot recirculating command buffer that drove the codecs, dial tone generators, tone decoders, ring generators and the like. Basically the CPU would schedule the sender and receiver for the bus by dropping commands into two parallel queues (one for transmit, one for receive), so there was no need for bus request or arbitration logic and yet the CPU could be slow, as the sequencer would just advance through the buffer every 83usec processing the commands that it found. It was a pretty clever way of substituting DRAM for bus control logic while reducing processor requirements.