Intel Corporation (~1991)

Mark Holler’s group at Intel needed a way for users to experiment with their new ETANN 8170NX. ETANN stood for Electronically Trainable Analog Neural Network. It was EEPROM based. Ghe Intel team and I put our heads together and came up with this huge board system. It had eight 3M sockets for the ETANNs. It had optocouplers to interface those to TTL/CMOS logic. Between the ETANNs there were rows of press-fit wirewrap tail sockets. This allowed the user to connect one IC to the other with jumper blocks or custom wirewrap, then probe signals from the top side, and connect to the PC using a special socket grid in one corner. Near the optocouplers was space for TTL or CMOS ICs to do some preprocessing or postprocessing or formatting and PC interface. I delivered many of these to Intel, and many labs were able to experiment, although carefully because all those wire wrap tails made the system fragile to handling. I had special tooling provided by a machinist friend used to insert the press-fit pin arrays, and I had to crank them in carefully with a large drill press provided by (Frank) Mertsoc Engineering. This could not have been done without advice from Frank himself, and his generosity with his shop space and equipment will not be forgotten. R.I.P.