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Type: Posts; User: Chuck(G)

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    No, just the far end.

    No, just the far end.
  2. Much the same reason that I don't care much for...

    Much the same reason that I don't care much for HP online anymore. I'd love to know where they moved all of the documentation and software for their older PCs.
  3. I'm not surprised--M$ appears to be on a campaign...

    I'm not surprised--M$ appears to be on a campaign to eliminate everything not W10 nowadays.
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    Unidirectional--as I said, terminated through...

    Unidirectional--as I said, terminated through 220/330 ohms on the far end, which uses bog-standard LSTTL as receivers.
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    Sloppy fingers--it's the 74BCT760...

    Sloppy fingers--it's the 74BCT760
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    If you were after the original, why not look for...

    If you were after the original, why not look for the Kyocera 85? After all, Tandy didn't design or initially produce this thing.
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    Cheat on driving long OC loads?

    I'm working on a design that involves driving 5V 220/330 ohm terminated lines, TTL levels. The spec calls for OC drivers, but I'm wondering if I can get away with driving 1-2 m lines at about 1.4...
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    The 5150 floppy controller used the SLT packages...

    The 5150 floppy controller used the SLT packages as well, which always seemed to me to be a bit strange, seeing as how IBM was working to use commodity parts for the 5150.
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    I thought that the OP said that he had a DOB...

    I thought that the OP said that he had a DOB already. I assumed that he also had the software.
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    Well, the PIC32 MCUs are MIPS-based, but I fear...

    Well, the PIC32 MCUs are MIPS-based, but I fear losing to the ocean of ARM MCUs.
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    CopyIIPC files are sui generis; as far as I am...

    CopyIIPC files are sui generis; as far as I am aware, there exist no format interchange utilities for those.
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    There's also the real thing; the 8085-based RAIR...

    There's also the real thing; the 8085-based RAIR "Black Box", which looks a lot like a PC:

    http://www.old-computers.com/museum/photos/rair_black-box_2s.jpg

    Later models even had 8088 CPUs.
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    Sure, but is any POWER development happening? ...

    Sure, but is any POWER development happening? It's not clear to me.
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    I thought that IBM was dropping POWER from...

    I thought that IBM was dropping POWER from development.
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    Gone, pretty much...

    Gone, pretty much

    I thought they were already history when AMD64 came out. Amazing how long they've held on.

    So, that leaves us with current production of what, x86 and ARM for CPUs? (I'm...
  16. Isn't the EEPROM, the little 8 pin DIP just to...

    Isn't the EEPROM, the little 8 pin DIP just to the right of the DIP swtich? In that case, it's likely a simple serial NOVRAM chip, like the Xicor X2444. Programmable via software.

    There's this...
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    Intel announced discontinuation this year. ...

    Intel announced discontinuation this year. They're history.
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    Depends on what you mean by modern. The...

    Depends on what you mean by modern. The recently-discontinued Itanium IA-64 series has its own instruction set, not compatible with x86.
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    I still have most of a carton of those FD505...

    I still have most of a carton of those FD505 drives. My numbers come from actual measurements. The FD105 was Teac's little-publicized slimline 5.25" drive.
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    Given the vintage of this thing, the chopper...

    Given the vintage of this thing, the chopper output transistors are likely TV horizontal output types. I don't know if that helps or not.
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    I don't think so. A half-height 5.25" drive is...

    I don't think so. A half-height 5.25" drive is about 1.6" tall. Take the Teac FD505 as a model.

    The FD05 (3.5") part is 0.5" high (nominally) and the FD105 (5.25") is about 1" high (or about...
  22. No, I specifically requested more information. ...

    No, I specifically requested more information. Scan patterns, voltage polarities, etc. would be useful.

    I try not to go into things blindly. You're welcome to, however. ;)
  23. And now you understand what I posted what I did...

    And now you understand what I posted what I did about getting details before offering suggestions. :)

    Been caught in that trap before--it gets embarrassing and expensive. :(
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    Years ago, I sent some stuff to John. Too bad...

    Years ago, I sent some stuff to John. Too bad that he's had to give it up.
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    8088 equivalent? That's easy and only requires...

    8088 equivalent? That's easy and only requires an XCO and a couple of wires (and a replacement CPU).
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