Image Map Image Map
Tab Content
  • m_thompson's Avatar
    February 21st, 2019, 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...
    16 replies | 510 view(s)
  • wa2flq's Avatar
    February 21st, 2019, 08:49 AM
    wa2flq replied to a thread Testing a DEQNA (M7504) board in DEC
    Testing the CPU does have a low probability of finding the problem in this case, but the operating systems don't really exercise all the...
    13 replies | 264 view(s)
  • m_thompson's Avatar
    February 21st, 2019, 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.
    16 replies | 510 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...
    16 replies | 510 view(s)
  • wa2flq's Avatar
    February 19th, 2019, 12:22 AM
    wa2flq replied to a thread Testing a DEQNA (M7504) board in DEC
    The plastic handles are the usual spots for the revision stamps (component side). I don't recall what the fix was for, but I doubt that the DD drive...
    13 replies | 264 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! :>)
    16 replies | 510 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
    16 replies | 510 view(s)
  • wa2flq's Avatar
    February 17th, 2019, 07:11 PM
    wa2flq replied to a thread Testing a DEQNA (M7504) board in DEC
    I get the feeling that it dies near the code that determines the actual device type. Perhaps interrupts are being missed? If the DLV11J is a true...
    13 replies | 264 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 | 619 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.
    16 replies | 510 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 | 619 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...
    16 replies | 510 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,...
    16 replies | 510 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 | 619 view(s)
  • wa2flq's Avatar
    February 15th, 2019, 12:18 PM
    wa2flq replied to a thread Testing a DEQNA (M7504) board in DEC
    I believe the last two digits indicate a revision level. There is some supplemental information in the EK-DELQA-UG-002 and EK-DEQNA-UG-001 about...
    13 replies | 264 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 | 264 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...
    16 replies | 510 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 | 264 view(s)
  • wa2flq's Avatar
    February 14th, 2019, 07:37 PM
    wa2flq replied to a thread Bought a PDP-11/03-L in DEC
    The quad board was the original release of the UC07. The latest firmware rev for the UC07 I am aware of is G143R on dual board. I reviewed my...
    65 replies | 4339 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 | 176 view(s)
  • wa2flq's Avatar
    February 14th, 2019, 06:02 AM
    wa2flq replied to a thread Bought a PDP-11/03-L in DEC
    Yes that is true. My intent was to keep the configuration complexity low and provide options with row risks for someone new to the architecture. ...
    65 replies | 4339 view(s)
  • wa2flq's Avatar
    February 13th, 2019, 10:01 PM
    wa2flq replied to a thread Bought a PDP-11/03-L in DEC
    I researched this a bit more. If you look at pictures of the component and solder side of the board, you will see that the CD slots of the board only...
    65 replies | 4339 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)
  • 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)
  • 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)
  • Ed Groenenberg's Avatar
    February 11th, 2019, 12:28 PM
    Today I got an NCR branded CSI to Pertec interface board. It does not look very complicated, and there are 4 switch blocks. Two of them have some...
    0 replies | 84 view(s)
  • Ed Groenenberg's Avatar
    February 11th, 2019, 12:18 PM
    I got the interface card in today.
    3 replies | 187 view(s)
  • Ed Groenenberg's Avatar
    February 7th, 2019, 02:37 AM
    I have a complete set of RSX11M 4.x manuals available, volume 7a & 7b are in a single binder. I'm downsizing a little as I also have the 11m-Plus...
    0 replies | 102 view(s)
  • Ed Groenenberg's Avatar
    February 7th, 2019, 01:10 AM
    I'll keep that in mind! In the mean time, I've was able to find an NCR branded SCSI to Pertec board, which is currently on i's way.
    3 replies | 187 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 | 524 view(s)
More Activity
About jackrubin

Basic Information

About jackrubin
Biography:
Started computing in 1959 (GENIAC), still trying to figure things out
Location:
Wilmette, IL (north of Chicago)
Interests:
CP/M, PDP8 & 11, RTTY
Occupation:
Stay-at-home computer dad

Signature


Statistics


Total Posts
Total Posts
608
Posts Per Day
0.11
Albums
Total Albums
2
Total Photos
10
General Information
Last Activity
Today 06:11 AM
Join Date
March 11th, 2004
Referrals
2

8 Friends

  1. Ed Groenenberg Ed Groenenberg is offline

    Junior Member

    Ed Groenenberg
  2. Lou - N2MIY Lou - N2MIY is offline

    Senior Member

    Lou - N2MIY
  3. m_thompson m_thompson is offline

    Senior Member

    m_thompson
  4. orgwood orgwood is offline

    Member

    orgwood
  5. Perkunas Perkunas is offline

    Junior Member

    Perkunas
  6. RSX11M+ RSX11M+ is offline

    Senior Member

    RSX11M+
  7. Silent700 Silent700 is offline

    Junior Member

    Silent700
  8. wa2flq wa2flq is offline

    Senior Member

    wa2flq
Showing Friends 1 to 8 of 8
View jackrubin's Blog

Recent Entries

DEC extender adapter for over-the-top OMNIBUS boards

by jackrubin on June 30th, 2017 at 02:50 PM
Quote Originally Posted by jackrubin View Post
Revision 2 just arrived - smaller board, no vias. Based on how hard I had to smack the connectors with the hammer, I've opened the holes up a little in the next batch. First cable set goes out for testing tomorrow.





Read More

Categories
Uncategorized