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Type: Posts; User: Gary C

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  1. Replies
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    Views
    6,838

    What a massive step forward Top remote...

    What a massive step forward

    Top remote diagnostics Dave !
  2. Thread: 8050

    by Gary C
    Replies
    23
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    702

    Have attached the Arduino and my 8050 together...

    Have attached the Arduino and my 8050 together and they almost play nice. I can load/save to the arduino then load/save to the 8050, however, while I am reading the device number and ignoring it if...
  3. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    The next thing I need to work out is, how are...

    The next thing I need to work out is, how are machine language programs saved?

    I can load basic programs from my tape emulator and save them over the GPIB, but while the book 'PET and the IEEE-488...
  4. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    While refurbishing the drives, ive also been...

    While refurbishing the drives, ive also been working on my Arduino interface.

    Basically, it seemed unnecessary to have GPIB buffer chips when the Arduino I/O can sit directly on the bus. I just...
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    It is possible from basic to poke the controller...

    It is possible from basic to poke the controller chip and step the head of a drive.

    There is a basic 'head cleaner' program https://willus.com/trs80/?-a+1+-p+125631+-f+1 which if typed in might...
  6. Replies
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    2,932

    I would be interested in any VT's or microVax...

    I would be interested in any VT's or microVax but I imagine shipping to the UK would be prohibitive.
  7. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    Tried a format with no luck. As the drive stinks...

    Tried a format with no luck. As the drive stinks of tobacco, its worth a strip down.

    So,
    56302
    Bit dusty.

    First remove the carriage retaining screws.
    56303

    Remove the spindle drive motor...
  8. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    Would be, but it would also need shipping to the...

    Would be, but it would also need shipping to the UK. Anyway, the 8050 came with a cable, result !
  9. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    Tried a format and it failed. I think a head...

    Tried a format and it failed.

    I think a head clean is in order first.

    It does the 'apple II' style head rattle so i think its stepping.
  10. Replies
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    1,182

    Nope, just compact cassettes

    Nope, just compact cassettes
  11. Replies
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    1,182

    You should try my 1989 Porsche Carrera Now...

    You should try my 1989 Porsche Carrera

    Now that feels vintage.
  12. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    Couldnt resist. No flaps on drive doors ! ...

    Couldnt resist.

    No flaps on drive doors !

    but found them inside the drive box.

    Drive responds to commands, but not sure it will initialise a disk. Was taking an age, but had to stop and go...
  13. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    On other news, I got the 8050 home tonight and it...

    On other news, I got the 8050 home tonight and it looks in good ish condition and it even came with the PET cable.

    A retired electronics engineer, had a few more items but I had no time to peruse...
  14. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    Will do. I have a board on order to make the...

    Will do. I have a board on order to make the completion of the software easier (its a bit dangly wire at the moment)
  15. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    Crikey JLCPCB are good. Didnt like designspark,...

    Crikey JLCPCB are good. Didnt like designspark, but redrawn in Kicad and just awaiting the PCB. Bit cheaper too, 2 instead of 177 ! Think I wasnt getting something right in DS.
  16. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    That seems like a good idea, thanks. Last time...

    That seems like a good idea, thanks.

    Last time I made a circuit board, it was single sided photo resist and etched at work, but that must have been 30 years ago.

    Got my PET storage working and...
  17. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    Cheers Dave I have the Gerbers ready to go (i...

    Cheers Dave

    I have the Gerbers ready to go (i hope !) and uploaded them to Mint Tek but the quote was stupid, It maybe because I have done something wrong and asking for it to be etched in unicorn...
  18. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    Question for anyone I have drafted a pcb in...

    Question for anyone

    I have drafted a pcb in design spark and want to get a board built, but the RS suggested website Mint Tek comes back with a quote of 177 !

    What PCB services do people use ?
  19. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    Will do. May take a while though.

    Will do.

    May take a while though.
  20. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    IT WORKS ! Not the new drive, not picked it up...

    IT WORKS !

    Not the new drive, not picked it up yet, but I can successfully load a single line basic program from my Arduino, over the GPIB into the PET.

    I know its small beans and been done...
  21. Thread: 8050

    by Gary C
    Replies
    23
    Views
    702

    8050

    Just bought a 8050 disk drive for 25, but a GPIB cable would cost more than the drive !

    Time to get the soldering iron out unless someone knows a source of cheaper ones ?

    Already have a HP...
  22. Replies
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    https://hackaday.com/2016/06/06/the-worlds-supply-...

    https://hackaday.com/2016/06/06/the-worlds-supply-of-db-19-connectors/
  23. Replies
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    11,169

    Cheers. I will replace the chips tomorrow....

    Cheers.

    I will replace the chips tomorrow. Hopefully the cracked leg was causing the problem, but as it was strong enough not to get left in the socket, I would have though it was intact enough...
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    11,169

    Back to this board after getting the TRS80 and...

    Back to this board after getting the TRS80 and Microvax up and running.

    Can now get it to boot fine (never found out why one working disk interface didn't like this machine) and I have been using...
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    Ive had some luck with...

    Ive had some luck with https://www.amazon.co.uk/gp/product/B07QDP4SCV/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1

    Just used it to resolve a problem with my Apple II as the ram was not being...
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