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Type: Posts; User: Roland Huisman

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  1. Replies
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    In the meanwhile I found the manual for that...

    In the meanwhile I found the manual for that serial module too.
    It explains how to use it from the software side and the settings for
    the jumpers. It can run on many baud rates from 50 to 19200...
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    True, if you have the right equipment... Time for...

    True, if you have the right equipment... Time for a new (old) programmer I guess...
    It is a 10L8. I will check if I have other options to read it.



    Okay, that should be good news...
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    Hello Jos and Monty, Here is a picture of the...

    Hello Jos and Monty,

    Here is a picture of the serial board. I will check if I can read the EPROM soon.
    But there is also a PAL chip... :(

    61838

    I've checked the looks of the Tektronix 4907...
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    That was the manual I found later indeed. The...

    That was the manual I found later indeed. The cable is now back to the original wiring scheme.
    I will check out the plot files!
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    Tektronix 4052

    Hi everyone,

    Last week I saved this old Tektronix 4052 from being scrapped. I had seen it before being
    dumped in a corner waiting to be scrapped. I didn't really care about it. But then I got...
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    Hi Monty, I will make a new topic for the...

    Hi Monty,



    I will make a new topic for the 4052 and post some pictures from it.
    I've made a lot of pictures of my 4010 and sent them to Kurt for the Tek WiKi.
    Maybe he likes to place them...
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    Hi Jos, Thanks, I will check it out! The...

    Hi Jos,

    Thanks, I will check it out!

    The data cable is a bit messy. Only gnd, rx and tx are connected trough an old mains cable. :sad:
    So I want to make it original again, but I can't find the...
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    Tektronix 4010

    Last week I've picked up some nice old pieces of history. One of them was the Tektronix 4010.

    61795

    Because it has collected dirt for 46 years, I first cleaned thoroughly.

    61796 61797 61798...
  9. 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...
  10. 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...
  11. 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...
  12. 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...
  13. 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...
  18. 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...
  23. Hi Vince, Very interesting to hear any...

    Hi Vince,

    Very interesting to hear any progress...
  24. 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...
  25. 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...
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