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Two hand-soldered wire wrap boards by Diablo Systems, a hardware supplier for Xerox, known for its pioneering work on early printers and disk drives, such as those used in the Xerox Alto, a precursor to modern personal computers. Both circuit boards measure 15˝ x 15˝ and are marked “Diablo Systems, Wire Wrap Assy” along their respective upper borders. These boards, which contain 93425 static RAM, are based on the AMD2901 and AMD2909 series chips, which were used on legendary historical computers like the Apollo Guidance Computer, DEC PDP systems, and Xerox STAR. In overall fine condition. A rare artifact that showcases the pioneering hands-on engineering techniques of the 1970s and 1980s.
The consignor notes that these boards were discovered with various new-old-stock parts for the Diablo Systems Printer, such as ribbons, roller wheels, bearings, and more. Grimm, a talented test engineer, worked for Xerox in Rochester, New York, which later acquired Diablo Systems. Grimm moved to California to work for Diablo and was eventually recruited to join Apple Computer and work in the company’s test engineering department. The consignor also believes that Grimm hand-assembled these boards himself.
From the collection of Dennis Grimm.
