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Type: Posts; User: gekaufman

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  1. Replies
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    I built an interface for the Praxis 35 using...

    I built an interface for the Praxis 35 using 4066's wired to the keyboard matrix. It was slow (especially on carriage return) but worked nicely.
    Unfortunately the print head on that Olivetti didn't...
  2. I used an Radio Shack branded Ungar for years,...

    I used an Radio Shack branded Ungar for years, then a Weller.

    I picked up a Metcal as part of a larger lot of parts and gave it a try. Haven't touched the Weller since. Still have a spare...
  3. Thread: Osi c4p

    by gekaufman
    Replies
    103
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    2,458

    Do you have the caps lock on ?

    Do you have the caps lock on ?
  4. Replies
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    382

    The obvious question is what are you trying to...

    The obvious question is what are you trying to program....
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    2,612

    Bill (WSM)’s MinZ systems are super slick and...

    Bill (WSM)’s MinZ systems are super slick and tiny, well worth considering. The Z80-MBC2 and Zeta2 are also others you should look into.
    If you want the full S100 experience look at...
  6. I have an original CCS2422 that came in a system...

    I have an original CCS2422 that came in a system I purchased. I have never used it.

    U21 is not installed, I have read U22 and U23 (74S287 PROM) but can't seem to append a .bin or .hex file
    ...
  7. Replies
    43
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    72,982

    I do have a handful left. I've been asking $40...

    I do have a handful left.
    I've been asking $40 for an assembled, tested unit with midi cable and 3D printed case (plus actual postage). Less if you are looking for more than one.

    - Gary
  8. Replies
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    481

    I have a BK867C programmer, and 74S287's (256x4...

    I have a BK867C programmer, and 74S287's (256x4 TS) that should be equivalent.

    Happy to program, but I'm in the USA so shipping may be costly....

    - Gary
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    Rich - I also have two of the Micromint Z8...

    Rich -

    I also have two of the Micromint Z8 basic boards, and probably have the documentation here too. The psudostatic ram was an interesting feature of that board.

    BTW, There's a nice Z8...
  10. Replies
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    72,982

    I've had a few emails lately asking about PC...

    I've had a few emails lately asking about PC boards and assembled units. I got a bit carried away and ordered/built up a batch of these with 3D printed cases etc. I still have some spares if anyone...
  11. Thread: Fluke TK80A

    by gekaufman
    Replies
    3
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    377

    I have the same board and searched for...

    I have the same board and searched for documentation unsuccessfully (except for the manuals mentioned by others here). If you do find anything please let me know!

    My board does appear to function...
  12. Replies
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    Google image search is your friend.... Image...

    Google image search is your friend....

    Image was copied from another location, clearly a scam (as if there was ever any doubt).
    ...
  13. The IBM Thinkpad T42 also works nicely. I've...

    The IBM Thinkpad T42 also works nicely.

    I've never been able to use the EMP20 with anything but a "real" LPT. No luck with any of the Needham programmers and the USB<-->LPT adapters.

    - Gary
  14. Replies
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    751

    I located my spare PB10 87xx adapter board, a...

    I located my spare PB10 87xx adapter board, a picture is attached.

    This board supported 8751's, 7742's, 8748's, 8755's etc. I believe it was a later design than the single 8751 adapter you...
  15. Replies
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    751

    Dwight - I do have an 8748 adapter, but no...

    Dwight -

    I do have an 8748 adapter, but no schematic. I think I have a spare, but couldn't easily locate it last night. I'll keep looking, if I do have a spare I certainly don't need two.

    I...
  16. Replies
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    751

    I found a print-out of the schematic. The...

    I found a print-out of the schematic. The original file might be on one of the 5.25" disks but I'll have to pull out an older system to look.

    I scanned the printout to...
  17. Replies
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    751

    I’m pretty sure that Needham did release the...

    I’m pretty sure that Needham did release the schematic for the PB10. They were a great company to deal with, but sadly no longer in business (the current owners have the name but don’t really...
  18. Replies
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    2,515

    Interesting parts, also equivalent to WS57C49,...

    Interesting parts, also equivalent to WS57C49, very fast. Looks like they were really intended to replace bipolar proms as the pinout Is different.
  19. Replies
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    I've never heard of/seen the 68765. Does it...

    I've never heard of/seen the 68765. Does it exist?

    The Needham's EMP30/31 and BK867C will handle the 68764 and 68766.
  20. Replies
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    If you have a way to program them, the Motorola...

    If you have a way to program them, the Motorola type 68764 or 68766's are an 8Kx8 EPROM that will directly substitute for many mask ROMs.
  21. Replies
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    Look at John Monahan's site www.s100computer.com...

    Look at John Monahan's site www.s100computer.com

    John has released serial, parallel and video cards. Bare cards are available. No composite video, but the Propeller VGA card is easy to build and...
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    Matthew D’Asaro designed a very nice power supply...

    Matthew D’Asaro designed a very nice power supply load. http://www.dasarodesigns.com/product/pc-at-ps2-power-supply-load-tester/

    Well worth building.

    - Gary
  23. Replies
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    The other board is an IMSAI PIC-8. If the SD...

    The other board is an IMSAI PIC-8.

    If the SD systems Z8800 is the board with the modification it may be a known update to correct a DMA problem.

    - Gary
  24. Replies
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    Actually lots of replies on the S100 Forum ...

    Actually lots of replies on the S100 Forum

    https://groups.google.com/forum/#!forum/s100computers
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    I have a TL866A. The TL866A has the ICSP header...

    I have a TL866A. The TL866A has the ICSP header and TL866CS does not, otherwise the devices are identical.

    Its a cute programmer and for the low price difficult to beat. It also will do some...
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