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  • m_thompson's Avatar
    Yesterday, 10:53 AM
    m_thompson replied to a thread PDP-9 at the RICM in DEC
    Those are the mating connectors for the power cords on the CRAY, so we didn't care what the donor did. We were just happy to get the very expensive...
    15 replies | 491 view(s)
  • m_thompson's Avatar
    Yesterday, 04:54 AM
    m_thompson replied to a thread PDP-9 at the RICM in DEC
    The little Crays can run off a 220VAC single phase circuit. The big Crays need a lot more power. These are the power connectors for the T3E.
    15 replies | 491 view(s)
  • m_thompson's Avatar
    February 20th, 2019, 04:43 AM
    m_thompson replied to a thread PDP-9 at the RICM in DEC
    Three of the Crays were functional when they were donated, but have not been powered up because of lack of a suitable power source. The SV1 was part...
    15 replies | 491 view(s)
  • MattisLind's Avatar
    February 19th, 2019, 07:59 AM
    MattisLind replied to a thread 1970 Wang 700 in Other
    RICM has many Wang systems. http://www.ricomputermuseum.org/Home/small-systems-at-ricm/wang-720b-programmable-calculator This one look similar.
    1 replies | 79 view(s)
  • jackrubin's Avatar
    February 18th, 2019, 05:35 PM
    jackrubin replied to a thread PDP-9 at the RICM in DEC
    Nicely put, Mike - I didn't know you did understatement! :>)
    15 replies | 491 view(s)
  • m_thompson's Avatar
    February 18th, 2019, 01:49 PM
    m_thompson replied to a thread PDP-9 at the RICM in DEC
    Just a few more systems; http://www.ricomputermuseum.org/Home/equipment
    15 replies | 491 view(s)
  • jackrubin's Avatar
    February 17th, 2019, 09:13 AM
    jackrubin replied to a thread Goodbye Cctech Mailing List in DEC
    +1, Mike - and even better, it was easier to follow as a narrative in the digest than in a series of one-off emails.
    16 replies | 616 view(s)
  • m_thompson's Avatar
    February 17th, 2019, 08:36 AM
    m_thompson replied to a thread PDP-9 at the RICM in DEC
    It was a little messy after the move, but now the PDP-9 has some nice company.
    15 replies | 491 view(s)
  • m_thompson's Avatar
    February 17th, 2019, 08:32 AM
    m_thompson replied to a thread Goodbye Cctech Mailing List in DEC
    I thought that your 11/45 thread was one of the best on Cctech in a very long time. I don't think that I could have solved the problem if the diags...
    16 replies | 616 view(s)
  • m_thompson's Avatar
    February 17th, 2019, 08:26 AM
    m_thompson replied to a thread PDP-9 at the RICM in DEC
    We did have it running for a long time, but I don't think that the warehouse environment helps the reliability. The PDP-8/I and the PDP-12...
    15 replies | 491 view(s)
  • m_thompson's Avatar
    February 17th, 2019, 08:17 AM
    m_thompson replied to a thread PDP-9 at the RICM in DEC
    The original lab space was about 800 sq/ft, and the new space is about 2x the original space. It looks like complete chaos right now after the move,...
    15 replies | 491 view(s)
  • MattisLind's Avatar
    February 16th, 2019, 05:24 AM
    MattisLind replied to a thread PDP-9 at the RICM in DEC
    Congratulations to the new space! Much easier to work with it when it is in a heated space. It will be very interesting to follow your work on...
    15 replies | 491 view(s)
  • jackrubin's Avatar
    February 16th, 2019, 03:22 AM
    jackrubin replied to a thread Goodbye Cctech Mailing List in DEC
    I subscribe to the daily digest which means I just get one email a day, organized with a table of contents and then individual messages to follow....
    16 replies | 616 view(s)
  • m_thompson's Avatar
    February 15th, 2019, 10:42 AM
    1.3.3.1 Bootstrap - The DEQNA contains a 4-Kbyte ROM (BD ROM - Boot/Diagnostic ROM) that host software can read. The BD ROM contains PDP-II code...
    13 replies | 261 view(s)
  • m_thompson's Avatar
    February 15th, 2019, 10:38 AM
    m_thompson started a thread PDP-9 at the RICM in DEC
    Tomorrow the RICM is moving the Lab to new+ space that is about twice the current size. That means that we can haul some more interesting items out...
    15 replies | 491 view(s)
  • m_thompson's Avatar
    February 15th, 2019, 09:50 AM
    There is a lot of info on the ROM and ZQNA diags in this manual: http://manx-docs.org/collections/antonio/dec/cmiv5rm4.pdf And DEQNA diags in this...
    13 replies | 261 view(s)
  • m_thompson's Avatar
    February 14th, 2019, 09:52 AM
    I think that I have the same processor board in one of my Multibus systems.
    5 replies | 173 view(s)
  • m_thompson's Avatar
    February 13th, 2019, 05:17 PM
    m_thompson replied to a thread Gt40 in DEC
    Mattis, Thanks for the help. Our museum is moving to a new space in the building across the parking lot. The first system to move will be the...
    11 replies | 634 view(s)
  • MattisLind's Avatar
    February 13th, 2019, 12:02 PM
    MattisLind replied to a thread Gt40 in DEC
    If the terminator is a M930 it can be hard to see at the first glance. They are quite short... AB3 and AB5 is the same slots for the terminator as...
    11 replies | 634 view(s)
  • m_thompson's Avatar
    February 13th, 2019, 09:30 AM
    m_thompson replied to a thread Gt40 in DEC
    We would need to remove the M7013 VT11 Display Control & Character Generator to reveal the KM11 slot, if it has not been rewired for use with the...
    11 replies | 634 view(s)
  • MattisLind's Avatar
    February 13th, 2019, 05:25 AM
    MattisLind replied to a thread Gt40 in DEC
    Did you try it with or without UNIBUS terminators? The other day I forgot both terminators and the machine was pretty much dead. Installing them and...
    11 replies | 634 view(s)
  • m_thompson's Avatar
    February 11th, 2019, 01:59 PM
    m_thompson replied to a thread Gt40 in DEC
    The console on the 11/05 is unresponsive, so we have some debugging to do. I was thinking of buying one of the KM11 replicas to aid in debugging....
    11 replies | 634 view(s)
  • MattisLind's Avatar
    February 10th, 2019, 11:10 PM
    When there is no beep at startup my experience is that the low ROM is bad. If you have the AVO this ROM can be replaced with a ordinary 2716. Another...
    3 replies | 309 view(s)
  • MattisLind's Avatar
    February 8th, 2019, 05:12 AM
    Here is the module utilization for the TC11: Even the number of boards match very well. Missing just one M149 board.
    6 replies | 522 view(s)
  • MattisLind's Avatar
    February 8th, 2019, 04:43 AM
    MattisLind replied to a thread Backplanes DD11A and MM11F in DEC
    If you add a dash, MM11-F and DD11-A, then google is a bit more friendly: For example http://gunkies.org/wiki/MM11-E_and_MM1-F_core_memories and...
    2 replies | 163 view(s)
  • MattisLind's Avatar
    February 7th, 2019, 12:41 AM
    Looks like all the flip chips from a TC11 is in there. Sad that backplane is gone.
    6 replies | 522 view(s)
  • jackrubin's Avatar
    February 6th, 2019, 07:37 PM
    Those G888's will go nicely in the TU56 you're looking for as well. Nice find.
    6 replies | 522 view(s)
  • m_thompson's Avatar
    February 6th, 2019, 05:09 PM
    Almost enough parts to build a TU10...
    6 replies | 522 view(s)
  • MattisLind's Avatar
    February 6th, 2019, 08:35 AM
    Not much in terms of I/O as far as I can see. There is one single BACI board in there. I/O is shown in one of the last pictures.
    5 replies | 309 view(s)
  • m_thompson's Avatar
    February 4th, 2019, 04:39 AM
    m_thompson replied to a thread Digital 32KW RAM pcb in DEC
    How about adding two serial ports to the next version?
    16 replies | 807 view(s)
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About m_thompson

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About m_thompson
Biography:
Volunteer at the RICM. Working on a PDP-12, PDP-8/I, 8/L, 8/e, PDP-9, 11/34a, and 11/44.
Location:
Rhode Island
Interests:
Vintage minicomputers.
Occupation:
Engineer

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Member of the Rhode Island Computer Museum
http://www.ricomputermuseum.org

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