Does anyone have details about the STC ZEBRA? Tony?

STC = Stantec = Standard Telephone and Cable. They sold a truly strange computer called the ZEBRA. It was designed to be cheap (it used a drum for storage and did arithmetic serially). The instruction format is unusual -- 15 function bits (I think each affects a gate) and a 12-bit address of a drum location and a 5-bit address of a "fast store" location (basically a small number of registers). The amount of logic in the machine is small, so the instruction decoding is simple in a sense. But the logic is connected in very subtle ways -- two things can happen independently, or an instruction can set a whole sequence of events in motion. There is an emulator for this machine; I have some of the literature about it too. But I don't have the manual or the schematics, and the literature I have just doesn't make the design "click" into place in my head. The emulator code is not very intuitive either. So that's why I'm hoping someone else has heard of this machine. -- Derek P.S. Tony, I think you would enjoy this design (if you don't already know about it).