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  1. Hi Vince, Then I will read all tapes. Is it...

    Hi Vince,

    Then I will read all tapes. Is it okay that I sent the images to you?
    You seem to have all the tools and a brilliant website to share the images too.



    Yes, but I have never made...
  2. Hi Monty, I've picked up the the Tek...

    Hi Monty,

    I've picked up the the Tek yesterday. It is an 4052. And I got an 4010 also! I have been told that
    both are defective. So both are nice projects! :D There was an extra power supply...
  3. Okay, got a bunch of new software today. If there...

    Okay, got a bunch of new software today. If there is anything interesting, let me know.
    I assume that all the DEC labelled stuff is online already... It seems some music stuff
    and I guess some...
  4. Very nice find! A real 12 bit mini computer! Some...

    Very nice find! A real 12 bit mini computer! Some collectors are searching literally
    YEARS for these things... (Or just pay a LOT of money for it)

    In short what you have:

    The CPU:
    M8330...
  5. Hi Andrew, No these are to a good new home. ...

    Hi Andrew,

    No these are to a good new home.

    Regards, Roland
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    These boards are on their way to their new...

    These boards are on their way to their new owners.


    BTW, If anyone has done a run of the VC8E boards then I'm interested in one bare M885R DAC board!

    Regards, Roland
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    I've made a little interface PCB to connect the...

    I've made a little interface PCB to connect the VC8E directly to a Tektronix monitor.
    There is a range of Tektronix XYZ monitors which have a DB25 connector on the back.
    This PCB supports the...
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    8KW core stack MM8EJ PDP8/E

    I could not resist it! There was a complete 8KW core stack on Ebay.
    https://www.ebay.com/itm/184316500020

    Not tested, No warranty, No returns... That combined with blurry
    pictures usually means...
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    Well the PDP8/F had its ups and downs... At first...

    Well the PDP8/F had its ups and downs... At first I modified the power supply wiring.
    In my PDP8/M I had a fried power connector. The +5V wire was clearly overloaded.

    61536 61537

    Since I have...
  10. So for those who are interested, there is a...

    So for those who are interested, there is a DEC8251 replacement (SN7442) pcb on my GitHub.
    https://github.com/Roland-Huisman/DEC8251_replacement

    61494 61495 61496 61497 61498

    I got the timing...
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    Hi Mike, Thanks! I'm not sure for what I'm...

    Hi Mike,

    Thanks! I'm not sure for what I'm looking for... I'm not familiar with the software at all...
    I have seen some handwriting in manuals and modified loaders. But I don't know the...
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    Hello Joe, I know, the chunka-chunka is normal...

    Hello Joe,

    I know, the chunka-chunka is normal for an open loop. But that open current loop state was not my question.
    The Teletype in the OFF state will NEVER go chunka-chunka because the motor...
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    Hi Vince, Thanks! So that 4915 mod was done by...

    Hi Vince,
    Thanks! So that 4915 mod was done by the Teletype company them selves?
    Did you order a specific model Teletype 33 ASR suitable for a PDP8 back then?




    Hi Dwight,
    As far as I know...
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    Teletype 33 ASR

    Oh dear, what have I done... Something with mechanics and dirty hands :wow:
    When I got my PDP8/M in 2016 I got a Teletype 33 ASR with it. Never paid much
    attention to it. And in the meanwhile I got...
  15. Hi Vince, Very interesting to hear any...

    Hi Vince,

    Very interesting to hear any progress...
  16. Ah good point. Jos Dreesen pointed me also to...

    Ah good point. Jos Dreesen pointed me also to RogAlgol stuff at bitsavers.
    But I didn't see the version differences like you showed here. To be honest, I don't have
    any clue about how to use the...
  17. Yes that should work as well with a FACIT N4000....

    Yes that should work as well with a FACIT N4000.

    - F4 opens a new file and asks for a file name
    - Now you can sent the data to the computer.
    - F5 closes the file.
    - F6 clears the rubbish off...
  18. Well, I don't know the history of the tapes....

    Well, I don't know the history of the tapes. Maybe it was the work of a student to make some sort of proof of concept.



    Don't blame the museum on anything... That museum just got a bunch of...
  19. Vince mentioned GTTY which I use quite often to...

    Vince mentioned GTTY which I use quite often to upload paper tapes to my machines. GTTY can do exactly
    what I want. You open a new file, store the bytes which you throw into the COM port, then close...
  20. Ah off course! Didn't think about that... ...

    Ah off course! Didn't think about that...



    No... I have the original paper tapes. I just read the plain 8 bits from tape with the PDP8
    and sent that to the serial port. That is done by that...
  21. Yes I know, but in this case the full length of...

    Yes I know, but in this case the full length of the tape is punched for the highest bit. So this is not a parity in this case.



    It seems that it is that FOCAL game indeed. You can read the...
  22. Well it looks to me that this might be the...

    Well it looks to me that this might be the RogAlgol compiler written in Algol.
    there is a binary tape starting at address 200. That might be te compiler itself.
  23. I made a quick YouTube film about reading the...

    I made a quick YouTube film about reading the tapes...
    That nasty H960 case fan needs new bearings -again- :(

    https://youtu.be/KjgM3cpgiIk

    Looking at the structure of these .PA programs they...
  24. That Algol 60 seems to be ...

    That Algol 60 seems to be a piece of Dutch history. Edsger W. Dijkstra worked on the first
    version for the Electrologica X1 And Edsger W. Dijkstra was also the inventor of the interrupt :D
    That...
  25. I made a little program for the PDP8 to sent the...

    I made a little program for the PDP8 to sent the PC04 data to the second serial port.



    I used Tera term to read the ASCII files. These are attached here.
    But I had to set Tera Term to 7+1 to...
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