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Type: Posts; User: DeltaDon

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  1. Replies
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    1,265

    I'll vote for the Cyrix and VIA cpu's. As an...

    I'll vote for the Cyrix and VIA cpu's.

    As an inverse of worst CPU's I'd put in a vote for most overlooked - the AMD K6-II+ and 3+ CPU's that weren't sold to the general public IIRC. Very nice...
  2. At least a package shipped to the UK has a 99.9%...

    At least a package shipped to the UK has a 99.9% chance of making it to the other end unlike some other EU countries (name redacted but a lot of pasta is served there) were there's a better than...
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    1,128

    Of late, I've been replacing classic 7805's with...

    Of late, I've been replacing classic 7805's with EzSBC's switchers and also using their LM323K switcher 3 or 5 amp replacements.
  4. Lots of pictures of everything but the PC boards...

    Lots of pictures of everything but the PC boards which is where your problem exists.
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    439

    You might try jointing the S-100 Google Group...

    You might try jointing the S-100 Google Group since they might be able to supply a copy of a ROM for your system that allows it to talk to the serial port.
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    Try searching what's available from Fedco...

    Try searching what's available from Fedco Electronics: https://www.energyplusbatteries.com/battery-cells.html

    I used to use them for replacement laptop batteries and had them rebuild some...
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    Don't know if the blink codes in this old thread...

    Don't know if the blink codes in this old thread match what you are seeing, but take a look: https://www.technibble.com/forums/threads/diagnostic-blink-codes-for-toshiba-notebooks.19067/

    Plus...
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    I've got several. First I have an old Heath iron...

    I've got several. First I have an old Heath iron with low-med-high settings, it's been a "friend" for decades and I would hate to get rid of it. One day the heater element will die and that will be...
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    But I don't wish to steal this thread, just...

    But I don't wish to steal this thread, just commenting that things go FUBAR when main filter caps aren't installed. However, pwr. supply designer cheaped out, IMHO, and used one winding output...
  10. I've installed CF card & adapter in a few Pentium...

    I've installed CF card & adapter in a few Pentium 1 laptops, but not a Toshiba. There's a couple of things that cause a failure. A double CF adapter is more likely to not work. Also, not all CF cards...
  11. With the creation of low cost Chinese 3D printers...

    With the creation of low cost Chinese 3D printers there should be a large quantity of cheap steppers to purchase to replace the failed ones. Good luck!
  12. Replies
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    I'm fighting a failed S-100 system at the moment...

    I'm fighting a failed S-100 system at the moment just because a single electrolytic capacitor in the power supply had one of it's leads break free from the circuit board. The net result was that the...
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    Go ahead and check the fuses, always a good...

    Go ahead and check the fuses, always a good check.

    In your 4th photo showing the power supply there's two light blue electrolytic cap's and both have bulged tops, a sure sign that they need...
  14. Have you tried MEK as a solvent that melts the...

    Have you tried MEK as a solvent that melts the pieces back together? It works very well (too well if you you too much) on some plastics. The Orange or Blue home center stores carry it in the paint...
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    Most laptops are not critical of input voltage as...

    Most laptops are not critical of input voltage as long as within a volt or two. The voltage has to be higher than the full charge voltage of the battery to be able to charge it. Otherwise, the...
  16. You might try talking to these people: ...

    You might try talking to these people: https://pimpmykeyboard.com/
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    WTD: Epson QX-16 CRT monitor

    As in the title, looking for a working 120VAC 60 Hz QX-16 CRT monitor, not interested in a QX-10 CRT since I have one. Plus the QX-16 can display colors. I believe the sync frequencies for the QX-16...
  18. Thread: S-100 bad day

    by DeltaDon
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    2
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    499

    I pulled the cage apart and moved the power leads...

    I pulled the cage apart and moved the power leads out from under the cage and no more ground faults. One small step....
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    Jon, The 2 ribbons shown in the link are hard...

    Jon,

    The 2 ribbons shown in the link are hard to determine length without a reference. I'm guessing the shorter one is under 2" and is a 16 conductor ribbon. The long one is folded over and...
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    Trashing a NEC Starlet 80 character x 40 line...

    Trashing a NEC Starlet 80 character x 40 line laptop because the LCD was shot, but I kept an older version Starlet with the 64x24 line LCD display and the AC powered floppy module. (this I don't...
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    I have some unconfigured NOS Green 753 Pentium 1...

    I have some unconfigured NOS Green 753 Pentium 1 (non-mmx) laptops still sealed in the OEM shipping boxes. How many do you want? They need CPU, RAM, HDD, OS plus a battery. Includes 3.5" driver...
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    If you have 8251 serial port chips then make sure...

    If you have 8251 serial port chips then make sure the status byte checks for CTS. I had to change the checking to look for all RS-232 signals for a couple of S-100 CPU boards that were set up for...
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    Besides using heat, have you tried cold? It used...

    Besides using heat, have you tried cold? It used to be easy to find FreezeMist or the Radio Shack stuff, but as with most things not GREEN, it is almost impossible to find locally these days. But...
  24. Thread: S-100 bad day

    by DeltaDon
    Replies
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    499

    S-100 bad day

    Yesterday was one of those one step forward, two steps back days. I'm working on a 4 slot S-100 XOR Z80 computer I bought some time ago. The power supply for the twin 1/2 height 8" drives went out...
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    Yeah, Stabilant. I too never bought any Stabilant...

    Yeah, Stabilant. I too never bought any Stabilant with any limited spare money, just trinkets for the better half. No doubt that's why I'm still married to the same woman and she's allowed :p me to...
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