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We did discuss LSI with Seymour, bipolar of course; CMOS was much too slow and not interesting till 1984 when1micron CMOS became available. Seymour did encourage me to build a bipolar semiconductor pilot line to build chips for prototype computers. We experimented with 256 gates per chip and used the Fairchild bipolar process. We developed a direct write e-beam front-end process that was used in Boulder in addition to making it available to Fairchild Semiconductor as part of the "quid pro quo" for Fairchild giving us the front end bipolar process. I recall working very closely with Doug Peltzer; he was in charge of bipolar process development during those days as well as Tom Longo. Tom was in charge of Fairchild's research center and was also on the board of Cray Research. I subsequently went to work for Tom at the Fairchild Research Center where I worked on microprocessor development.
There were many discussions about the selling price of the Cray computers, Seymour and John Rollwagen did not want to drop down to 1 million-dollar computers, they wanted to stay at the 10 million range which ultimately destroyed the company (my opinion only). Their customers, the big labs wanted less expensive smaller machines and wanted to experiment with parallel processing at the time.
I understand he was an avid sailboard sailor and built his own boards. I don't recall that he had any other hobbies.