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Type: Posts; User: Chuck(G)

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    Glad you worked it out. Have fun! FWIW, if you...

    Glad you worked it out. Have fun!
    FWIW, if you want to try that 2K drive on a PC, just call it a 3.5" 720K.
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    You can check the operation of the floppy drive...

    You can check the operation of the floppy drive independently of the computer, if you have a power supply and a few test clips. Basically, you apply power and ground the configured drive select. ...
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    If you're only working with a single drive, that...

    If you're only working with a single drive, that one must have a terminator (the DIP in the blue socket near the edge connector).

    Your first drive should be set to DS0 and the second (B) should be...
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    Okay, let's start with the 241. First thing to...

    Okay, let's start with the 241. First thing to notice is that in the 8272A data sheet, some pins are input, some are output and some have dual personalities, depending on what's being done. In the...
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    That's not right. According to the schematic...

    That's not right. According to the schematic (pdf page 125) of the Tech ref manual, pin 2 of U40 is directly connected to pin 18 of the floppy drives.

    So, we can assume one of the following:
    ...
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    See post 35...

    See post 35. Falter knows this already.

    Please review the thread and note the exact nature of the problem.
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    I see no reason that the Gotek with FlashFloppy...

    I see no reason that the Gotek with FlashFloppy would not work with the 2K either.

    But if you're after the authentic Tandy 2K, you're pretty much confined to real floppy drives and media. But...
  8. I've had old 104 film caps used for decoupling...

    I've had old 104 film caps used for decoupling explode every now and then.

    There's a reason for the old stuff working--frequencies were lower, particularly in power supplies (everything seems to...
  9. Sticky: The TI chip is a floating point DSP...

    The TI chip is a floating point DSP. The IDT7024 is a 4Kx16 high speed dual-ported static RAM. The Altera chip is probably a CPLD for the ISA bus interface. On the connector side, you have...
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    Did you miss the post where the drive doesn't...

    Did you miss the post where the drive doesn't seek to home at any point in the power/boot sequence?
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    Check the pins on the 7416 that I cited above. ...

    Check the pins on the 7416 that I cited above. It's not usual for those to go bad under load. In a pinch, you can get away with a 7406--actually a better chip for this application.
  12. Look at the second shell half in my photo, See...

    Look at the second shell half in my photo, See the recess cut for the leaf spring? That's the kind of hood that I'm looking for. The OEM was probably Cannon (P/N MD-15-00L-VL) Seems to have been...
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    Does the drive seek to track 0 on the T1000?

    Does the drive seek to track 0 on the T1000?
  14. DA15 slide-lock hood with 90 degree entry.

    The title pretty much says it all. Somewhat akin to this one, but 15 pin Dsub and the entry is on the side. Can't seem to find any online.
    ...
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    Don't let the small caps faze you--I've...

    Don't let the small caps faze you--I've hand-soldered 0603s with no problem. Just takes a little practice is all. With a hot-air tool, it would be even easier.
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    Does the 2K use the PC drive-select convention?...

    Does the 2K use the PC drive-select convention? That is, are both jumpered to the second drive select and the cable uses a twist to differentiate them? Or does the 2K use first drive=DS1, second...
  17. Welcome to the world of babel-terminals. ...

    Welcome to the world of babel-terminals. Televideo did produce a VT220-type terminal, but that was the 922.

    Here's the terminfo for the 920C
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    Hmmm, that's not right. The 765 should be...

    Hmmm, that's not right. The 765 should be issuing a "recalibrate" as part of its reset sequence, as the software needs to know the actual position of the drive head--and the only reliable way to do...
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    Ah, I think I understand now--you're placing a...

    Ah, I think I understand now--you're placing a via in a component soldering pad. I wouldn't do it--vias are formed by a electroless plating process and are, therefore, less robust than regular...
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    "Then I've just been plopping vias down right on...

    "Then I've just been plopping vias down right on the solder pads"

    I'm not following. To me, a via is an interlayer device connecting two layers of a PCB. Do you mean something else?
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    Does the floppy drive seek to track 0 upon boot?

    Does the floppy drive seek to track 0 upon boot?
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    FWIW, you can also use CopyQM in "blind" mode.

    FWIW, you can also use CopyQM in "blind" mode.
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    Do you need a step-by-step on how to take a Tandy...

    Do you need a step-by-step on how to take a Tandy 2000 5.25" floppy to a 3.5" DSDD? I've got a 2K sample in my collection, so I'm willing run through the process. You need a PC capable of running...
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    You both have your PS5s now?

    You both have your PS5s now?
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    Howso? IMD can do it with very little finagling.

    Howso? IMD can do it with very little finagling.
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