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Type: Posts; User: Tibs

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  1. Replies
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    908

    It sounds like it could be one of the 1488/1489...

    It sounds like it could be one of the 1488/1489 line drivers on the serial board/motherboard based on which version you have. In the IIIs/4s/4Ps I have restored, 90% have one of these failed. ...
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    4,773

    Great thread. I restored a 16A last summer and...

    Great thread. I restored a 16A last summer and had a great time with it. Have a Model II with a bad 68000 card I need to figure out now, your thread has me planning to start back this weekend.
  3. Replies
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    1,309

    Jig saw!1

    Jig saw!1
  4. Replies
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    1,309

    As someone who has repaired quite a few of these,...

    As someone who has repaired quite a few of these, the GA are much easier to work on and fix if you have the parts. Having said that, the parts that fail are not easily found because they were...
  5. Replies
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    1,494

    If its dropping straight to Cass? you might still...

    If its dropping straight to Cass? you might still have an issue with the controller, or more importantly power/motherboard connection to it. Also, the controller cable to motherboard is fragile and...
  6. Replies
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    1,291

    Another way to tell if its an ALPS, the @ will be...

    Another way to tell if its an ALPS, the @ will be smaller on the ALPS Model I vs the Cherry being bigger. Thats if you're looking at one online and cant pop it apart.
  7. Thread: Model 4 BBS

    by Tibs
    Replies
    5
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    859

    PBBS is one I have run across recently that was...

    PBBS is one I have run across recently that was easy to set up.
  8. Replies
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    482

    Lord that exposed 110 line looks like an easy zap...

    Lord that exposed 110 line looks like an easy zap waiting to happen. Looks like wood paneling and zip ties. Keyboard being orientated right would have been easier too. Neat picture.
  9. Takes a while sometimes. There is a key you...

    Takes a while sometimes.

    There is a key you press while booting to use the native keyboard driver I canít recall which one. Get the manual and read through it will make life much more...
  10. Replies
    11
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    1,809

    I thought there was a ROM too?

    I thought there was a ROM too?
  11. Was entertaining and painful to watch at the same...

    Was entertaining and painful to watch at the same time. I am surprised that executives couldn't even speak naturally, but hey maybe thats how it was back in the 80.

    Thanks for sharing, it was a...
  12. Replies
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    1,904

    Just part it out. Might take some time, but...

    Just part it out. Might take some time, but you'll get enough in parts to be fine. Not everyone needs a whole model 4, but I bet someone needs a keyboard. Just an example.
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    1,165

    I still have not seen a Model III/4 desk, which I...

    I still have not seen a Model III/4 desk, which I had with a printer stand back in the 80s. And yes, the Model I desk is weak, the brand new in box one I have already has a slight bow.
  14. Replies
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    You can get replacement card edges from a few...

    You can get replacement card edges from a few online parts places. unicorn requires a minimum purchase, digikey, Newark and mouser might have them. You can just pop the old off and put a new one...
  15. Replies
    7
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    1,143

    Hopefully someone has the instructions for the...

    Hopefully someone has the instructions for the DIN mod here, its not easy to undo on the EI since there are trace cuts and stuff.

    The straight through should NOT be used with a buffered EI, as...
  16. Love the ties man, classy. And I'm serious for...

    Love the ties man, classy. And I'm serious for those who think I'm not.
  17. Replies
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    1,013

    They are out there from plenty of people, but you...

    They are out there from plenty of people, but you can also flip the connector around (I mean remove it from the ribbon and put on upside down) if you want, because half the pins are ground signals. ...
  18. Replies
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    1,469

    I've had some Model 4/4Ps with the single power...

    I've had some Model 4/4Ps with the single power supply have issues with the header on the power supply being worn out. I dont mean the pins and solder on the power supply but the plastic part that...
  19. Thread: Memory Upgrade

    by Tibs
    Replies
    4
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    930

    Just type memory in LSDOS, it should show the...

    Just type memory in LSDOS, it should show the banks you have.
  20. Thread: TRS 80 Warehouse

    by Tibs
    Replies
    50
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    6,740

    Those external drives require a controller to...

    Those external drives require a controller to feed 12v on the cable to power the relay, they "work" but dont look like it without a controller.
  21. Replies
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    522

    You want a 1208 from VDC. ...

    You want a 1208 from VDC. https://cathoderaytubes.com/collections/monitor-display-tubes/products/vdc1208dp31be
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    3,202

    Yeah I use tcpser on a raspberry pi. Its 9600...

    Yeah I use tcpser on a raspberry pi. Its 9600 baud and reachable via telnet. I just need to run it through the paces really well since it was originally for DOSPLUS on a Model I and I am not sure...
  23. Replies
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    2,978

    You might have a lifted trace under the cassette...

    You might have a lifted trace under the cassette relay from the variable resistor, and also the three CMOS chips could be zapped. Possibly Z41 (8 pin chip). The chips are Z5/6 and I think 56,...
  24. I wouldn't leave it unless you have to, because...

    I wouldn't leave it unless you have to, because one day you'll make a change and forget about it.

    Basic Faster and Better had quite a few good lessons/techniques for programming on these old rigs...
  25. You can copy and paste into the emulator but that...

    You can copy and paste into the emulator but that will take eons. You can use trstools to put it on a DSK image that you can find out there. Check out Tim Mann's retrocomputing site and you can...
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