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  • m_thompson's Avatar
    Today, 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...
    10 replies | 286 view(s)
  • MattisLind's Avatar
    Yesterday, 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 | 55 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
    10 replies | 286 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.
    10 replies | 286 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 | 577 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...
    10 replies | 286 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,...
    10 replies | 286 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...
    10 replies | 286 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...
    11 replies | 210 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...
    10 replies | 286 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...
    11 replies | 210 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 | 161 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 | 577 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 | 577 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 | 577 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 | 577 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 | 577 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 | 282 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 | 489 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...
    1 replies | 116 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 | 489 view(s)
  • m_thompson's Avatar
    February 6th, 2019, 05:09 PM
    Almost enough parts to build a TU10...
    6 replies | 489 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 | 277 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?
    14 replies | 680 view(s)
  • m_thompson's Avatar
    February 3rd, 2019, 06:12 PM
    m_thompson replied to a thread Gt40 in DEC
    We reformed the capacitors in the power supply and connected a DC power supply to the input capacitors. The +15, +5, and -15V regulators all worked...
    11 replies | 577 view(s)
  • m_thompson's Avatar
    February 3rd, 2019, 06:07 PM
    m_thompson replied to a thread PDP-8L Modules in DEC
    I modified mine to use a USB/SPI cable and wrote Windows software to read the same test files and run the tester.
    7 replies | 338 view(s)
  • MattisLind's Avatar
    February 3rd, 2019, 07:23 AM
    MattisLind replied to a thread PDP-8L Modules in DEC
    Depending on what condition your machine is in you might want one like this: An M-series module tester. Vince Slyngstad makes them based on...
    7 replies | 338 view(s)
  • m_thompson's Avatar
    February 3rd, 2019, 05:34 AM
    m_thompson replied to a thread PDP-8L Modules in DEC
    The RICM made a detailed blog about restoring their 8/L.\ You can read about it here.
    7 replies | 338 view(s)
  • MattisLind's Avatar
    February 3rd, 2019, 01:12 AM
    Mine show 000000 at address 177776.
    2 replies | 199 view(s)
  • MattisLind's Avatar
    February 2nd, 2019, 10:45 PM
    MattisLind replied to a thread KDF11 board question in DEC
    The KEF11-B CIS microcode is a double size module so you could not have it simultaneously with the KEF11-A floating point option on the KDF11-A. The...
    4 replies | 226 view(s)
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