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Thread: PDP 8/I backplane diagram needed!

  1. #1

    Default PDP 8/I backplane diagram needed!

    Hello everybody! I've been trying to find a diagram of the PDP 8/i's wire wrap backplane, unfortunately I can't find anything.

    I was wondering if anybody has a diagram of it that they could scan to me or if you can point me in the right direction to where I can find one.
    Thanks!

  2. #2

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    Quote Originally Posted by ComputerGeek View Post
    Hello everybody! I've been trying to find a diagram of the PDP 8/i's wire wrap backplane, unfortunately I can't find anything.

    I was wondering if anybody has a diagram of it that they could scan to me or if you can point me in the right direction to where I can find one.
    What level of detail are you looking for? DEC drawings can be found at
    http://www.bitsavers.org/pdf/dec/pdp...ings_Dec71.pdf
    and pages 40 and 41 specifically describe the backplane component placement.

    There's also my version:
    http://svn.so-much-stuff.com/svn/tru.../pdp8i-dec.pdf
    which folds in the pre-wired options. The directory
    http://svn.so-much-stuff.com/svn/tru...cts/DEC/PDP8I/
    also has the Eagle CAD drawings, if you are looking to extract the whole netlist.

    Vince

  3. #3

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    The first link wasn't what I was looking for but in the directory link, pdp8i-dec.brd is more what i'm looking for. Is there any difference between pdp8i-dec.brd and pdp8i.brd?

  4. #4

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    Quote Originally Posted by ComputerGeek View Post
    Is there any difference between pdp8i-dec.brd and pdp8i.brd?
    No, nothing substantive. Eagle verifies them as equivalent, though the files don't compare byte-wise.
    (I suspect one was saved with a slightly newer Eagle than the other.)

    Vince

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