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  • m_thompson's Avatar
    November 10th, 2018, 05:04 PM
    Looks like you have the bootstraps covered.
    31 replies | 1695 view(s)
  • MattisLind's Avatar
    November 7th, 2018, 12:22 PM
    MattisLind replied to a thread REMEX Paper Tape reader in DEC
    Happen to see this REMEX paper tape board on ebay. Never seen a Dual Omnibus board.
    105 replies | 4622 view(s)
  • m_thompson's Avatar
    November 7th, 2018, 09:55 AM
    I think that you can create a BOM for the components on Digikey, and then share the BOM. I could then order the parts from Digikey using your BOM.
    31 replies | 1695 view(s)
  • m_thompson's Avatar
    November 7th, 2018, 04:47 AM
    Could you sell a kit containing the PCB with gold fingers and all of the components? I would like to have two, and maybe three. You could contact...
    31 replies | 1695 view(s)
  • m_thompson's Avatar
    November 6th, 2018, 02:00 PM
    m_thompson replied to a thread REMEX Paper Tape reader in DEC
    We ran into this at the RICM when we make a 20mA<->RS-232 adapter and tried to read images of Focal source files. Periodically Focal would do some...
    105 replies | 4622 view(s)
  • m_thompson's Avatar
    October 30th, 2018, 08:59 AM
    m_thompson replied to a thread Broken RLV12 in DEC
    On my 8/e, I wrote some very small diags to test for specific issues. They let me test small parts of the board that I though were broken, and gave...
    13 replies | 773 view(s)
  • m_thompson's Avatar
    October 30th, 2018, 04:47 AM
    m_thompson replied to a thread Broken RLV12 in DEC
    The output of this diagnostic isn't very helpful. Usually they show you what they expect vs. what they found. On other repair projects I really...
    13 replies | 773 view(s)
  • m_thompson's Avatar
    October 29th, 2018, 04:25 PM
    m_thompson replied to a thread Broken RLV12 in DEC
    Oops, I am used to DEC systems that have a word size that is a multiple of 6 bits. HNF would imply that it expected a disk connected and working,...
    13 replies | 773 view(s)
  • m_thompson's Avatar
    October 29th, 2018, 08:58 AM
    m_thompson replied to a thread Broken RLV12 in DEC
    If I am interpreting the bits in the CS register (112200) correctly, the 11 is E3-E0 = Parity error abort (PAR ERR)
    13 replies | 773 view(s)
  • MattisLind's Avatar
    October 28th, 2018, 03:53 AM
    The receiver / transmitter chips are not 1488/1489 but DS9636/9638/9639 8 pin DIL chips on the DLV11-J. I have quite many of these failing on my...
    13 replies | 1326 view(s)
  • m_thompson's Avatar
    October 25th, 2018, 09:17 AM
    I made a modification to the OS/8 BOOT command to boot from the serialdisk.
    31 replies | 1695 view(s)
  • m_thompson's Avatar
    October 25th, 2018, 05:19 AM
    Was that the serialdisk bootloader that you showed at the end of the video?
    31 replies | 1695 view(s)
  • MattisLind's Avatar
    October 18th, 2018, 12:59 PM
    MattisLind replied to a thread Trying to create TU58 image in DEC
    Maybe this way too obvious: Did you detach the emulated TU58 in SimH? It is written when detaching.
    4 replies | 359 view(s)
  • MattisLind's Avatar
    October 16th, 2018, 01:21 PM
    MattisLind replied to a thread Newbie MicroVAX 2000 owner in DEC
    I have put some useful info here. A good manual is the technical manual. Study pages 3-131 and 3-234. They cover the use of the printer port as...
    3 replies | 364 view(s)
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