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Type: Posts; User: cb88

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  1. Replies
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    Didn't realize the ZFL-171 could have a hard...

    Didn't realize the ZFL-171 could have a hard drive though I was hoping someone would design a flash adapter for the partial ISA bus sticking out the back?

    Mine is a ZFL-171-82 (dunno what the 82...
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    2,853

    AD8055 should be connected as 1 = no care 2 =...

    AD8055 should be connected as

    1 = no care
    2 = 6
    3 = input
    4 = ground
    5 = no care
    6 = output
    7 = 5V supply
    8 = no care
  3. Replies
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    The OP amp allows you to measure a voltage...

    The OP amp allows you to measure a voltage without affecting it much (as it has a very high input impedance)...

    So you'd use diodes and resistors to combine the 3 signals, the diodes prevent...
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    17,706

    You shouldn't need a large FPGA since early sound...

    You shouldn't need a large FPGA since early sound cards aren't complex, soundblaster basically = 8051 mcu... talk to the guy doing the ISA expansion card, he has IIRC adlib, soundblaster, covox and...
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    If you add some method of accessing wifi (UART +...

    If you add some method of accessing wifi (UART + ESP-link probably would work fine)... and an EGA feature connector (so you could make an adapter board for the internal monitor for IBM and Compaq...
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    So... basically resistor ladder maybe some pots,...

    So... basically resistor ladder maybe some pots, and an a good OPAMP that sounds like what a guy did in another thread but he didn't post a schematic of his work.
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    That's very nice... I'm hoping I can figure out...

    That's very nice... I'm hoping I can figure out how to modify the Vide7 EGA card to output EGA on the internal monitor it has a feature connector much like the IBM EGA card so I think I can pull the...
  8. So, the problem I was running into yesterday was...

    So, the problem I was running into yesterday was not having the inboard driver loaded... will report back more later but I think it is all good now. Also the SD card CF interface seems to be working...
  9. So I just did this for my Compaq portable and it...

    So I just did this for my Compaq portable and it booted almost to dos.. getting parity check 2 at the moment but may as well say how I got that far lol.

    This will boot your floppy image and...
  10. Yeah I ordered a couple SD and Micro SD to CF...

    Yeah I ordered a couple SD and Micro SD to CF type 1 adapters from ebay.... I'll post my results in the week after next when I get back from a work trip. They are supposed to provide an actual IDE...
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    http://worldphaco.com/uploads/FITTING_AN_EGA_CARD_...

    http://worldphaco.com/uploads/FITTING_AN_EGA_CARD_TO_AN_IBM_5155.pdf

    Should be similar to adapt this for the Compaq portable... the difference is the portable CRTs can actually sync to EGA signals...
  12. Compaq Portable Plus + Inboard386 + Lotech CF lite = no boot

    So The bootrom does load so I do have a BIOS that can load roms... so that isn't it. The Inboard was in it when I got it and it requires a bootrom IIRC anyway...so yeah.

    The XTIDE Universal BIOS...
  13. Picked up a Zenith ZFL-171-82 at the computer...

    Picked up a Zenith ZFL-171-82 at the computer reset... 42 was apparently the usual model number no idea what 82 means? It's a very funny machine IMO... which is why I got it.... its just like a the...
  14. Yeah, I probably should mention my Tyan Thunder 2...

    Yeah, I probably should mention my Tyan Thunder 2 ATX whitebox also so as to not waste a post replying lol... Omnibook 800CT, Compaq TC1000, HP T5710 TM8600, Evergreen 486 upgrade. Thinkpad 240x, I...
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    I wouldn't mind having one those Compaq...

    I wouldn't mind having one those Compaq Portables... pretty neat machine basically a portable IBM PC I'm rebuilding one now as it was my first PC albeit souped up to a 486 or pentium via Intel...
  16. HyperStation 30 motherboard...

    HyperStation 30 motherboard https://imgur.com/gallery/fxwiAIA (also expansion sbus box + ZX graphics + SunPC + 142Mhz quad hypersparcs unsure of functionality as one set is a prototype).
    Ross...
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    Some of the community college's stuff I attended...

    Some of the community college's stuff I attended was still running on a Pr1me mini even up until around 2008 or so... they took out the terminals sometime after when I went back but they were...
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    I bought one of these recently for $50 on ebay......

    I bought one of these recently for $50 on ebay... suggest you set up a saved search with notifications if you didn't buy this one. I think the reason they run cooler is it's a 3.3V chip instead of...
  19. WTB Orchid Ramquest 8/16 and or Inboard piggyback boards.

    I'll pay a fair price, there was another Ramquest 8/16 listed on here awhile back that was too pricey for me (then it was sold for below what I offered by the same guy last month and I missed it but...
  20. Thread: IBM 5160 repair

    by cb88
    Replies
    5
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    453

    Replaced the 2 large electrolytics on the...

    Replaced the 2 large electrolytics on the incoming power and 3 of the output filters... powered it up and smoked the fuse so somthing is still amiss.

    Those 5 caps I pulled were definitely dead so...
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    This is the developer Coco Demus's site...

    This is the developer Coco Demus's site https://sites.google.com/site/tandycocoloco/mda-cga-ega-to-vga

    You can just order the Gerber files to be made to PCBs from your favorite PCB service like...
  22. Thread: XT/370 Questions

    by cb88
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    Yeah but that is the AT/370 which is a different...

    Yeah but that is the AT/370 which is a different machine... than the XT/370 the XT looks like an XT... obviously.
  23. Thread: XT/370 Questions

    by cb88
    Replies
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    Supposedly it can actually execute S/370 programs...

    Supposedly it can actually execute S/370 programs if you have the emulator card and was used for development of software for the S/370 system... But it's just slower than a real mainframe less memory...
  24. http://www.minuszerodegrees.net/manuals/Video-7%20...

    http://www.minuszerodegrees.net/manuals/Video-7%20Enhanced%20Graphics%20Adapter%20%28VEGA%29%20-%20Users%20Manual%20-%201985.pdf

    Headland designed the card FCCID https://fccid.io/D2A62LVEGA
    ...
  25. Thread: IBM 5160 repair

    by cb88
    Replies
    5
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    453

    My board does have this mod which is apparently...

    My board does have this mod which is apparently from factory to support 32/8KB roms or some such? http://minuszerodegrees.net/5160/motherboard/5160_u18_u19_socket_mod.png

    It uses an integrated...
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