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  • wa2flq's Avatar
    Yesterday, 02:38 PM
    wa2flq replied to a thread Scored a KDJ11-A in DEC
    Congratulations. ODT on the KDJ11A requires 22bit addresses…even in 18bit backplanes. I just use 77777xxxx, as it drops any excess leading...
    5 replies | 177 view(s)
  • wa2flq's Avatar
    Yesterday, 08:34 AM
    wa2flq replied to a thread Scored a KDJ11-A in DEC
    My standard gear is a KDJ11-A and UC07. My KDJ11 Jumpers are only W3 and W5. The diagnostic is pretty good at detecting problems local to the CPU...
    5 replies | 177 view(s)
  • wa2flq's Avatar
    October 18th, 2018, 02:21 PM
    wa2flq replied to a thread Trying to create TU58 image in DEC
    The UCL.DAT file is created when you first define a user command. If you don't have UCL.SAV on SY:, you won't be able to create or use user...
    4 replies | 116 view(s)
  • wa2flq's Avatar
    October 15th, 2018, 12:58 PM
    wa2flq replied to a thread SCSI2SD and VMS 6.0 in DEC
    I haven't run VMS6.0, but I do run VMS 5.5-2 and 7.3 on the same model with a V5 SCSI2SD, so I don't believe there is any reason why it should not...
    4 replies | 201 view(s)
  • jackrubin's Avatar
    October 13th, 2018, 04:57 AM
    Here's how the pros do it - https://www.youtube.com/watch?v=BFqNP8VqoPs Strange Parts has many cool videos about manufacturing in China - worth a...
    16 replies | 810 view(s)
  • m_thompson's Avatar
    October 11th, 2018, 08:09 AM
    Mine was a lot more difficult to get running. One of the delay lines that was added by DEC as an ECO was ripped off the PCB. Vince gave me a flipchip...
    46 replies | 4087 view(s)
  • jackrubin's Avatar
    October 9th, 2018, 02:49 PM
    jackrubin replied to a thread PDP8/m fix before use... in DEC
    Lyle just replied to me and told me that while he would hope to (someday) update GTTY, for now he runs it using DOSBox from both Windows and Linux...
    14 replies | 700 view(s)
  • jackrubin's Avatar
    October 9th, 2018, 12:22 PM
    jackrubin replied to a thread PDP8/m fix before use... in DEC
    Just to be clear, Lyle Bickley wrote GTTY - glass teletype - using Dave Dunfield's micro-C compiler. It's a nice lightweight terminal program for the...
    14 replies | 700 view(s)
  • m_thompson's Avatar
    October 4th, 2018, 03:13 PM
    m_thompson replied to a thread Document scanning in DEC
    Vince has added schematics that I sent him, so I am sure that he would like to have copies of yours. I think that the documents are easier to use...
    5 replies | 344 view(s)
  • Lou - N2MIY's Avatar
    October 4th, 2018, 03:04 AM
    Lou - N2MIY replied to a thread H851 contacts in DEC
    Tim, You would be pleased to know that the H803 in the photo that I sent Roland was one salvaged from the Applicon system backplanes you gave...
    12 replies | 920 view(s)
  • Lou - N2MIY's Avatar
    October 3rd, 2018, 03:02 AM
    Lou - N2MIY replied to a thread H851 contacts in DEC
    Roland, Beautiful work! I imagined that the original H851 was likely made by splitting an H803 into quarters as you have done. Not only did...
    12 replies | 920 view(s)
  • m_thompson's Avatar
    October 2nd, 2018, 08:14 AM
    m_thompson replied to a thread REMEX Paper Tape reader in DEC
    All of my toys are in my cellar. The dehumidifier keeps it 40%-60% during the summer, and it will go below 40% in the winter. In the summer it rarely...
    34 replies | 1401 view(s)
  • m_thompson's Avatar
    October 2nd, 2018, 03:47 AM
    m_thompson replied to a thread REMEX Paper Tape reader in DEC
    In getting and keeping an 8/I and a PDP-12 running we have replaced LOTS of 7474 ICs, and quite a few 7400, 7440, 7438. We have several tubes of new...
    34 replies | 1401 view(s)
  • m_thompson's Avatar
    October 1st, 2018, 03:49 AM
    After you clean the heads, you can manually load them to make sure that nothing bad happens. The maintenance manual shows some jumpers that you can...
    46 replies | 4087 view(s)
  • m_thompson's Avatar
    September 26th, 2018, 03:35 AM
    m_thompson replied to a thread PDP Industrial Design in DEC
    You could also try some of the DEC groups on LinkedIn and Facebook.
    3 replies | 289 view(s)
  • Lou - N2MIY's Avatar
    September 26th, 2018, 03:02 AM
    Lou - N2MIY replied to a thread OS/8 programming overview? in DEC
    It won't work because the DECMate II needs the slushware. The best way to make bootable DECMate II floppies are from images and Dave D.'s Imagedisk....
    12 replies | 662 view(s)
  • jackrubin's Avatar
    September 25th, 2018, 07:47 PM
    jackrubin replied to a thread OS/8 programming overview? in DEC
    How about this? http://bitsavers.trailing-edge.com/pdf/dec/pdp8/os8/OS8_Handbook_Apr1974.pdf You'll definitely be chewing on this one for a...
    12 replies | 662 view(s)
  • jackrubin's Avatar
    September 25th, 2018, 06:32 PM
    jackrubin replied to a thread OS/8 programming overview? in DEC
    Here's the place to start - http://bitsavers.trailing-edge.com/pdf/dec/pdp8/handbooks/IntroToProgramming1969.pdf ...
    12 replies | 662 view(s)
  • wa2flq's Avatar
    September 25th, 2018, 04:55 AM
    wa2flq replied to a thread H11 (LSI-11) Troubleshooting in DEC
    You might want to check and disable the "Halt on Break" (framing error action) on the console board to rule out effects from serial input faults. ...
    10 replies | 639 view(s)
  • Lou - N2MIY's Avatar
    September 24th, 2018, 03:26 PM
    Lou - N2MIY replied to a thread VT320 problems solved in DEC
    Al, This may be heresy, but why not use the opportunity to replace the MMJ jack with a normal 6P6C jack? Then you will not need to buy the...
    3 replies | 267 view(s)
  • m_thompson's Avatar
    September 24th, 2018, 12:51 PM
    The RICM has one, http://www.ricomputermuseum.org/Home/equipment/data-general-aviion It hasn't been powered on in many years.
    11 replies | 1543 view(s)
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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

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Recent Entries

DEC extender adapter for over-the-top OMNIBUS boards

by jackrubin on June 30th, 2017 at 01:50 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.





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