Image Map Image Map
  • 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...
    12 replies | 336 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 | 58 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! :>)
    12 replies | 336 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
    12 replies | 336 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 | 581 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.
    12 replies | 336 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 | 581 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...
    12 replies | 336 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,...
    12 replies | 336 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...
    12 replies | 336 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 | 581 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 | 217 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...
    12 replies | 336 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 | 217 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 | 163 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 | 578 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 | 578 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 | 578 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 | 578 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 | 578 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 | 491 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 | 117 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 | 491 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 | 491 view(s)
  • m_thompson's Avatar
    February 6th, 2019, 05:09 PM
    Almost enough parts to build a TU10...
    6 replies | 491 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 | 691 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 | 578 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 | 350 view(s)
More Activity
About m_thompson

Basic Information

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

Signature


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

Statistics


Total Posts
Total Posts
1,054
Posts Per Day
0.62
General Information
Last Activity
Today 09:02 AM
Join Date
July 8th, 2014
Referrals
0

3 Friends

  1. jackrubin jackrubin is offline

    Senior Member

    jackrubin
  2. MattisLind MattisLind is offline

    Senior Member

    MattisLind
  3. mu301 mu301 is offline

    Junior Member

    mu301
Showing Friends 1 to 3 of 3