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Type: Posts; User: Chuck(G)

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  1. Replies
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    Yes, you can leave the batteries in, as they...

    Yes, you can leave the batteries in, as they supply a bias current; they don't actually take any part in operation and the current draw is in microamperes.

    Are you old enough to remember "C" bias...
  2. Yup, still have a bunch of the parallel ones. ...

    Yup, still have a bunch of the parallel ones. Of course, if you're talking to a "modern" computer, that parallel port may be a myth.
  3. Serial laplink running at 115K isn't awfully much...

    Serial laplink running at 115K isn't awfully much slower than the parallel variety--and it's often the most reliable. No fiddling with EPP, ECP, etc.
  4. A serial laplink cable is little more than 3...

    A serial laplink cable is little more than 3 wires and some jumpering on the back of each connector.

    Parallel "nibble mode" cables are only a little more complicated.
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    There is--the Vbb needs are very low...

    There is--the Vbb needs are very low current--it's basically a substrate bias. A resistor and a zener off of any of the -V supplies should have done it nicely, though there is a power sequencing...
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    First order of business, electrolytics. Then...

    First order of business, electrolytics.
    Then tantalums, if they're failing.
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    Well, they might be used in sequencers also. ...

    Well, they might be used in sequencers also. But I can't figure out why they're needed.
  8. Yeah, well, that's the reason that all of my...

    Yeah, well, that's the reason that all of my systems are multiple-boot. Win7 has terrible QIC80 support as well...
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    I wonder if this was a game for the 5150...

    I wonder if this was a game for the 5150 (cassette input).
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    The 14.3818 crystal is there to provide a...

    The 14.3818 crystal is there to provide a spec-required signal on the ISA bus--and also quite likely to clock the 8254 counter-timer. You don't want to fool with that.
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    Start by powering up the supply without a load. ...

    Start by powering up the supply without a load. It's a linear one and so should sit up and work. The big electrolytic is 50-50 probable dry.

    If you connect up the thing, make sure to add two...
  12. That tells something. The error has nothing to...

    That tells something. The error has nothing to do with DMA. The code is timing out waiting for an interrupt. I suspect it's the way the 8259 is set
    up, but that's just a hunch. I don't have...
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    No microprocessor here, for certain. We see a...

    No microprocessor here, for certain. We see a Moto 8K character generator ROM, which requires a Vbb of -3V; hence the battery holder.

    The 1702s are a mystery. Why anyone would be using them...
  14. Another possibility--a parallel port network...

    Another possibility--a parallel port network adapter.
  15. There were several "how do I align a floppy...

    There were several "how do I align a floppy drive". Let's see if I can find the file...

    Here it is
  16. As far as a test program goes, didn't I post a...

    As far as a test program goes, didn't I post a Read ID program here a couple of weeks ago under the subject of aligning floppy drives? Try that as a test for starters.
  17. The ideal thing for me would be to find a PS/2...

    The ideal thing for me would be to find a PS/2 NIC.

    So, on your MCA system, what I/O do you have? Floppy and hard disk and video, for certain. How about serial and parallel?
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    Have you looked at the code in joe's own editor? ...

    Have you looked at the code in joe's own editor? It's a Wordstar clone and versions exist for DOS, Win16, Win32 and various flavors of Linux (even ARM-based).
  19. Reminds me of the old FlashPath floppies. That...

    Reminds me of the old FlashPath floppies. That might work for you without the need to buy an emulator.
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    Since that was in 2002, I don't suspect that an...

    Since that was in 2002, I don't suspect that an MS fix will be forthcoming. :)

    You'll have to write your own library function, it seems.
  21. If I can't use it, I don't want it around. I'm...

    If I can't use it, I don't want it around. I'm not a collector--about a year and a half ago, I gave away a 6300 with 80MB hard drive as well as a TRS-80 Model 16 to the only person who would drive...
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    Less edge there than you'd think; I'm not...

    Less edge there than you'd think; I'm not exaggerating when I say a half millimeter--even 4-40 pan head screws don't to a reliable job. But thanks anyway.
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    As I understand it, the OP wants to use the C...

    As I understand it, the OP wants to use the C library function getch(). I don't know if there's a do-it-all standard C library function for this.
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    WTB: HP Colorado T3000 tape drive

    For some odd reason my drive is working on TR-3 carts. Since the T3000 were pretty common, does anyone have one gathering dust?
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    list of scan codes returned by INT 16h...

    list of scan codes returned by INT 16h

    I don't do Win10.
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