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PDP-6, (Programmed Data Processor-6)
DEC's first 36-bit [1] personal mainframe computer developed and manufactured from 1963, and shipped since 1964 [2], influential for the later PDP-10 with almost identical instruction sets. Addressing remained 18-bit, as in earlier DEC machines, allowing for a 256 Kiword main magnetic core memory, optionally with 16 words of fast memory constructed from discrete transistor flip-flops [3]. Output could be displayed on a DEC 340 display [4] [5] [6] [7] [8].

Already supporting Time-sharing, the operating system used was an early version of what later became TOPS-10, and several sites made custom versions of the system, available as source code. The PDP-6 with serial number 2 was donated to MIT's [9] Project MAC, where it was used to develop the ITS operating system. Richard Greenblatt et al. developed the Mac Hack VI chess program entirely in MIDAS, the PDP-6 macro assembler.
PDP-6 Flip-Flop [10] [11] [12] [13]


Bell and Kotok

Gordon Bell and Alan Kotok at PDP-6 in 1964 [14]

Robert Q

First tournament game by a computer, Carl Wagner (2190) - Robert Q, January 21, 1967 [15]
Allen Moulton and R. William Gosper operating "Robert Q" on a PDP-6 [16]

See also

External Links


  1. ^ Moby Memory by Lawrence J. Krakauer
  2. ^ PDP-6 Price List, February 1, 1964 (pdf)
  3. ^ PDP-6 from Wikipedia
  4. ^ I resign by Lawrence J. Krakauer
  5. ^ Chess stories by Lawrence J. Krakauer
  6. ^ Image of DEC 340 at A Critical History of Computer Graphics and Animation | Section 3: The industry evolves
  7. ^ History of Australian Computer Museum Society WA | PDP-6
  8. ^ James Gerard Fiasconaro (1970). A Computer-Controlled Graphical Display Processor. Project MAC, MIT, pdf
  9. ^ Mac Hack from Wikipedia
  10. ^ Bits by Lawrence J. Krakauer
  11. ^ PDP-6 Circuit Instruction Manual, © 1966, Digital Equipment Corporation (pdf)
  12. ^ PDP-6 Details from The Computer History Museum
  13. ^ /resources/still-image/DEC/PDP-6/ from The Computer History Museum
  14. ^ PDP-6 with Gordon Bell and Alan Kotok from The Computer History Museum, PDP-6 from Wikipedia
  15. ^ MIT Computer Loses to Human in Chess. Sun Journal (Lewiston), January 23, 1967, Google News
  16. ^ AP :: Images :: Search Results :: Carl Wagner, 1967, MIT Chess

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