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I'm wondering who here knows about this machine?? I got one recently and it has eleven cards with it. I have the 4200 CPU board with MB86900 Integer Unit and MB86910A Floating Point Coprocessor and the two Weiteks. Two ALM-1 multiplexer boards. A Sun SCSI-3. A Ciprico RimFire 3525 SCSI. A...

I have this interesting old machine, from Sperry Gyroscope Ottawa (Canada) and I'm trying to find out if anyone has seen one. It's quite a machine, three rackmounted cases with cards and cables to connect it together. It has a power supply/control unit, a time base, and the data processor. The...

Well, it's nice to see a good computer forum online finally. I have been into electronics most of my life and I'm just getting into teaching myself how to design complex computer circuitry. I have recently designed and drawn schematics for an eight bit relay CPU. It incorporates, so far, a...