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Type: Posts; User: David_M

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  1. Replies
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    The keyboard will work fine, the motherboard...

    The keyboard will work fine, the motherboard won't be able to display the lower case characters correctly though. The numeric pad will work fine because the keyboards just output ascii so pressing 7...
  2. The are not analog, they are definitely digital...

    The are not analog, they are definitely digital RGB.
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    They use one of the factory standard...

    They use one of the factory standard encodings.... but there was more than one standard encoding option. Basically you have to take a gamble and hope you buy the right one.
  4. If its not ticking your problem will be on the...

    If its not ticking your problem will be on the high voltage side. Something is preventing the oscillations from starting, you said it was recapped so its not likely to be C5 so I'd be looking at the...
  5. Since it has been recapped already, your problem...

    Since it has been recapped already, your problem is most likely the little feedback transformer. One of the windings goes open circuit, I see it mostly in 2+ and 2e power supplies.
    The quick way to...
  6. The over current protection is on +12, with no...

    The over current protection is on +12, with no load it will be at its maximum and any load on the regulated +5 will drive the supply harder and increase +12.
    The over current protection relies on...
  7. Replies
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    1,462

    Mostly correct, all the 2e clones from multiple...

    Mostly correct, all the 2e clones from multiple countries not just korea used that same chipset.
    Yes, while they are functional identical to the asics in a 2e, they are not pin compatible.
  8. Replies
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    2,930

    My generic RTC program supports the AT clock...

    My generic RTC program supports the AT clock mapping in an XT, so it should work with your card.
    http://www.minuszerodegrees.net/rtc/david_m/CLOCK.zip
  9. If you want a wildcard I have one, I also have...

    If you want a wildcard I have one, I also have bare boards if you want to make your own
  10. Replies
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    1,352

    No it only supports 5.25" floppy images. If...

    No it only supports 5.25" floppy images.

    If you want a hard drive emulator I just started shipping my new hard drive emulator card with beta firmware that can be updated in system with a...
  11. Replies
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    I'm still waiting on the new board order to...

    I'm still waiting on the new board order to arrive but I have two left from the last order. PM me.


    I based my design on this
    https://github.com/suaide/SDisk2/tree/master/firmware



    No but...
  12. Replies
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    1,352

    I did a layout of the updated design a few months...

    I did a layout of the updated design a few months back I sold the 30 I had made mostly as bare boards.
    I have another 20 coming that I tacked on to the order for the production cards of the hard...
  13. I'm surprised that people are blaming the CRT and...

    I'm surprised that people are blaming the CRT and the yoke when in post #2 the OP mentions a missing diode and a broken diode. The diodes are used to suppress ringing in the deflection coils.

    Why...
  14. I'd replace the diodes before I started blaming...

    I'd replace the diodes before I started blaming the yolk. The diodes are damper diodes to prevent the deflection voltage across the coil going negative and ringing, which is what I suspect is...
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    I think is is done in resin and not injection...

    I think is is done in resin and not injection molded
  16. Replies
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    5,725

    In theory that is how they are meant to fail and...

    In theory that is how they are meant to fail and when they fail that way they blow the fuse.


    In reality they fail OC and blow stinky brown goo all over the place and the supply keeps on working....
  17. How is your butthurt coming along. I hope it is...

    How is your butthurt coming along. I hope it is healing now.
  18. Replies
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    1,104

    I'm just doing the final testing phase of a...

    I'm just doing the final testing phase of a quikLoader redesign, it is currently fully compatible with the original card and does not need an external, eprom programmer. I understand your DOS has...
  19. You make a lot of assumptions, unfortunately most...

    You make a lot of assumptions, unfortunately most of them are wrong.
  20. There are no stability issues other than faulty...

    There are no stability issues other than faulty RAM chips. As "crude" as it is I was able to make it work with just the page from the saturn manual... you apparently can't. So forgive me if I don't...
  21. I created a Saturn card last year and some...

    I created a Saturn card last year and some lowlife in Russia has already ripped off the design and is selling poor quality pcbs.
    Why redo it again? It would be far more useful to find another card...
  22. A read or write will activate the soft latches so...

    A read or write will activate the soft latches so peek or poke will work.

    There is a page in the Saturn card documentation that details how the soft switches work, I used it to design the...
  23. Replies
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    2,476

    On the Saturn Reboot I combine the WR signal with...

    On the Saturn Reboot I combine the WR signal with Q3 effectively delaying WR being asserted until midway through the CPU phase and that solved timing issues on some clones that had issues. The same...
  24. Replies
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    2,476

    At the moment the flash is not going into command...

    At the moment the flash is not going into command mode so we cant even get a chip ID from it. So something about the write cycle timing it doesnt like.
  25. Replies
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    I'm currently doing a reboot of the quikloader...

    I'm currently doing a reboot of the quikloader cards. I'm having issues with getting the flash rom to behave correctly to allow writing to it but the prototypes work happily with the flash programmed...
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