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85   Gordon Bell  $200 $250 $275 2 You must login to place a bid.
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#85 - Gordon Bell Estimate: $1,000+

DEC PDP-6 S6205D board from Boston's Computer Museum signed by Gordon Bell

American electrical engineer (born 1934) employed by Digital Equipment Corporation, who designed several of their Programmed Data Processor (PDP) machines; his accolades include the IEEE John von Neumann Medal and the National Medal of Technology. Circuit board from a Digital Equipment Company PDP-6 computer, 11 x 9.5, signed at the top in red felt tip by the computer's architect, "Gordon Bell." One of 36 boards used in a PDP-6, it is marked "6205" on the back, "K" on the edge, and contains 1 bit of arithmetic register (AR), memory buffer (MB), and multiplier-quotient register (MQ). It has 88 transistors, a two-sided PC etch, two 18-pin connectors on the left edge, and two 22-pin connectors on the right edge. Because of these connectors, swapping a 6205 module was a major undertaking, and the mechanical coupling made it highly likely that fixing one fault would cause another. There was also a great fear of powering off a PDP-6, since it would generally result in at least one 6205 board failing. Also includes a smaller card from a PDP-6, marked "S602" on the red handle. In fine condition. The consignor notes that this was purchased from The Computer Museum in Boston in the 1980s; Bell was the museum's co-founder, and it was his habit to sign these boards and place them in the gift shop for sale to the public. Accompanied by an original brochure from The Computer Museum.




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