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Type: Posts; User: DeltaDon

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  1. Replies
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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...
  2. Thread: S-100 bad day

    by DeltaDon
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    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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    630

    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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    What was the stuff that Jerry Pournelle used to...

    What was the stuff that Jerry Pournelle used to put on connectors and stuff? Some kind of space program spin off product that cost $50 per 1/4 oz or something like that back in the '80's. If my old...
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    Don't forget to clean the S-100 connectors on the...

    Don't forget to clean the S-100 connectors on the mobo too. Lots of dust and dirt falls into those things. Plus if it doesn't have active termination you might be seeing noise spikes, but then again...
  6. If the Dell support doesn't give you what you are...

    If the Dell support doesn't give you what you are looking for then try the following two options: 1) Look on eBay for XPS T500 and/or 2) A good source for old websites is The Wayback Machine: ...
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    Post photos of the cables and I'll see if I have...

    Post photos of the cables and I'll see if I have something that might work from other brands for which that I own the last of the OEM's service stock.
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    +1 on Dwight's reply. Unloaded most old S-100...

    +1 on Dwight's reply. Unloaded most old S-100 linear power supplies should be in the +8.5 vdc +/- 0.5vdc more or less range and 16v to 18v for the other two. So the "+8vdc" supply has a problem with...
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    If you do go with Win98SE then search for the...

    If you do go with Win98SE then search for the unofficial Win98SE service pack! It was compiled with all the MS 98SE fixes that were not automatically installed plus some WinME updates that also work...
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    You might want to find cap's with a higher...

    You might want to find cap's with a higher voltage rating. See derating tantalum capacitors: https://www.avx.com/docs/techinfo/VoltageDeratingRulesforSolidTantalumandNiobiumCapacitors.pdf
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    A CRT terminal will provide +/- 12V to the...

    A CRT terminal will provide +/- 12V to the outgoing signals from its internal power supply. Input voltage for other pins may not need to be the full voltage swing - all depends upon the terminal....
  12. I guess I should add a few more items to my list:...

    I guess I should add a few more items to my list: 1/2 dozen S-100 computers, a NEC Starlet laptop plus floppy drive module, Netronics RS-232 terminal board with keyboard, Quest Super Elf with S-100...
  13. IIRC, there were programs that overwrote the...

    IIRC, there were programs that overwrote the memory copy of BIOS each boot up with an overlay that allowed larger HDD's to work back when Win98 was new. I no longer remember where I got my cop(y)ies...
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    Dwight, I see you take a lot (whole lot) longer...

    Dwight, I see you take a lot (whole lot) longer reforming cap's than what I've done in the past. Might be why I've had problems? :eek:
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    One old trick for restoring ribbons that no...

    One old trick for restoring ribbons that no longer print is to spray the ribbon itself with WD40. Works well the first time the ribbon goes dry, less so if repeated. Won't do a thing for the foam if...
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    I have (or maybe had) a Philips dot matrix...

    I have (or maybe had) a Philips dot matrix printer which was a wide format C Itoh version of the 8510. I could look up the details, but they're not important in regards to this discussion. Was is or...
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    Like retrogear said above, not video RAM. RAM...

    Like retrogear said above, not video RAM. RAM issue would show up as strange missing or always on (constant) video dots on the display.

    Repeat characters would be keyboard keys producing two...
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    Most likely the LCD, but check the cable out...

    Most likely the LCD, but check the cable out first.
  19. You might try a Teac FD-05 floppy or a Citizen...

    You might try a Teac FD-05 floppy or a Citizen W1D drive if the connector and floppy out lever matches the locations on the original drive.
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    Yes, the new one might be be a cable for the...

    Yes, the new one might be be a cable for the QX-16 which as I stated earlier didn't use the +12v's from the computer to power the monitor. For some reason Epson made a new monitor for the QX-16 and...
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    You are 100% correct on 20% without band.

    You are 100% correct on 20% without band.
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    Bulb needs high voltage and that comes from an...

    Bulb needs high voltage and that comes from an inverter board. Inverter boards have a habit of going south quite often. Look for the circuit board at other end of the cable going to the bulb. Might...
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    That sounds like it could be a device driver...

    That sounds like it could be a device driver issue. Is the screen only in reverse once in DOS, but not if you enter the BIOS screen? That would be a good test to see if driver related. Or perhaps...
  24. PM sent.

    PM sent.
  25. How about a large stack of NOS Alphatop Green 753...

    How about a large stack of NOS Alphatop Green 753 (non-mmx Pentium 1 CPU) laptops still in their OEM boxes?
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