I picked up a couple of Compupros that were used in a Titan missile test station. Each one has a Compupro 286 CPU, 64^H^H 128 K S-RAM card, EPROM card, system support card and Interfacer 4 card along with a number of custom cards. The operating system for them is in EPROM. These were used to operate a ultrasonic test machine by remote control. Each test stand had a turntable and gantry that would rotate the missile and run the test head up and down until it inspected the entire missile body. Each test head had four large ultrasonic transducers for detecting flaws in the missile. These computers generated the master timing for the ultra sonic pulses and converted the return signals from analog to digital then fed the data back to another computer for further processing. They could be operated at up to 200 MHz PRF. They also took care of things like controlling the programmable attenuators in the RF receiver. Most of the connectors on them were replaced with "Canon plugs" and an extra power supply added for use by one of the special cards. An extra fan was also added inside. All of the custom cards use gold SMA connectors to connect to each other and to carry the RF signals. The custom cards have some really neat devices on them such as flash A/D converters, very fast S-RAM for buffers, switchable attenuators, a crystal with 10-7 accuaracy, etc. I was going to convert these back to standard Compupro configuration but if anyone is seriously interested in them I will consider interesting trades or $$. PS I have lots of manuals for them too including schematics and theory of operation for the custom cards.