1. Forum
  2. USENET
  3. alt.sys.pdp11

  • DEC Chip

    From Abandoned Trolley@fred@fred-smith.co.uk to alt.sys.pdp11,vmsnet.pdp-11 on Fri Aug 9 08:08:58 2024
    From Newsgroup: alt.sys.pdp11




    I dont know if this dropbox link is going to work, or if either if these groups is still alive, but here goes anyway.


    https://www.dropbox.com/scl/fi/ihjbms0k1olyyjvnw3clk/DEC_Chip.jpg?rlkey=hv8pw5kq8mjmbk70655ilmt24&st=nu3xujar&dl=0


    The chips in the picture were removed from a working PDP 11/23 plus
    board (M8189 ?) some years ago, and have been sitting in that piece of anti-static foam ever since.

    I have a hazy memory of them being removed because they didnt agree with
    some weird revised boot prom which was wanted to boot up a RD53 or RD54
    disk

    If anybody is able to shed any light on them I would be interested to
    hear. I am having a bit of a clear out and it seems a shame to chuck
    them in the bin
    --- Synchronet 3.21d-Linux NewsLink 1.2
  • From cruff@cruff@ruffspot.net (Craig Ruff) to alt.sys.pdp11,vmsnet.pdp-11 on Fri Aug 9 11:42:13 2024
    From Newsgroup: alt.sys.pdp11

    I suspect they are microcode chips for the 11/23, but you should post
    about it here: https://forum.vcfed.org/index.php?forums/dec/ as someone
    there will know for sure.
    --- Synchronet 3.21d-Linux NewsLink 1.2
  • From Abandoned Trolley@fred@fred-smith.co.uk to alt.sys.pdp11,vmsnet.pdp-11 on Fri Aug 9 13:15:10 2024
    From Newsgroup: alt.sys.pdp11

    On 09/08/2024 12:42, Craig Ruff wrote:
    I suspect they are microcode chips for the 11/23, but you should post
    about it here: https://forum.vcfed.org/index.php?forums/dec/ as someone
    there will know for sure.


    The sort of microcode that the CPU can run without ?
    --- Synchronet 3.21d-Linux NewsLink 1.2
  • From drb@drb@ihatespam.msu.edu (Dennis Boone) to alt.sys.pdp11,vmsnet.pdp-11 on Fri Aug 9 15:02:06 2024
    From Newsgroup: alt.sys.pdp11

    If anybody is able to shed any light on them I would be interested to
    hear. I am having a bit of a clear out and it seems a shame to chuck
    them in the bin

    The 23-xxx numbers are often searchable. The narrow one seems to
    be the floating point unit, KEF11, and the wide one the memory
    management unit, KTF11, for F-11 PDPs.

    https://gunkies.org/wiki/KEF11-A_floating_point_chip

    De
    --- Synchronet 3.21d-Linux NewsLink 1.2