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    With your alignment diskette, you should be...

    With your alignment diskette, you should be looking at section 2.3.11, 2.3.15 and 2.3.18 of the service manual in that order.

    If the spindle isn't turning at more or less exactly 300 RPM, you will...
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    It isn't uncommon for the 5-pin DIN connector on...

    It isn't uncommon for the 5-pin DIN connector on the motherboard to succumb to stress in its solder connections. Carefully check those; buzz out the entire trace for each lead. Chances are that...
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    That's nice, but if you stick text into [ code ]...

    That's nice, but if you stick text into [ code ] brackets, I can snip it and trace through it myself, rather than enter each line manually, assemble and determine what's going on.
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    How about posting the relevant snippet of code? ...

    How about posting the relevant snippet of code? It shouldn't be that difficult.
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    The fan blowing through the card stack was a...

    The fan blowing through the card stack was a standard option for multibus cages.

    One of the reasons that I don't like the PC system of expansion cards. The NEC c-bus was better in this respect...
  6. Other than never having heard the term, I rather...

    Other than never having heard the term, I rather like "Balloonjet" :)
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    Yup, the same ones are available on Amazon and...

    Yup, the same ones are available on Amazon and eBay in bulk for about a buck apiece, if you don't like waiting for shipment from China. There seems to be a choice between one with a trimpot for...
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    PIP, and library programs (e.g. LU) will, of...

    PIP, and library programs (e.g. LU) will, of course, ignore the bc field--and probably not preserve it in a copy.
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    You have to wonder what's drawing the current. I...

    You have to wonder what's drawing the current. I have the original Tarbell 1771 floppy board and it uses regular 78xx TO-220 regulators that don't get overly hot. I don't remember that 8257 DMAC...
  10. Have you tried this driver...

    Have you tried this driver?
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    Well, if there were a demand, it wouldn't be...

    Well, if there were a demand, it wouldn't be difficult to make a TO-3 shaped PCB. Maybe glitch wants to do some--not my thing.
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    That's what I suspected. I'll venture that few...

    That's what I suspected. I'll venture that few programs use the bc feature.
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    Is there any particular reason to keep the TO-3...

    Is there any particular reason to keep the TO-3 appearance? LM2596 "simple switcher" based regulator modules are pretty cheap and small. 3A output.

    Figure it this way, if your supply is +10 and...
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    If you PIP a file in CP/M 3, does the entire last...

    If you PIP a file in CP/M 3, does the entire last 128-byte block get copied regardless of the bc field?
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    But then, if you write a file on CP/M 3 and use...

    But then, if you write a file on CP/M 3 and use the bc field and derive a checksum for it, the 2.2 checksum will be wrong, no?
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    It's a shunt around the series regulator (+5) to...

    It's a shunt around the series regulator (+5) to improve the current handling capacity at the expense of regulation accuracy. If you don't like it, you could replace the TO-3 regulator and resistor...
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    I address this in the later parts of the blog. ...

    I address this in the later parts of the blog. I employ a little trick to gently "push" on outputs to determine if they're tristate. If I gave more thought to this in retrospect, I could have...
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    That's an annoying thing about the blog...

    That's an annoying thing about the blog section--there is apparently no way for one to remove entries made in error--mostly by clicking the "blog this post" instead of the "reply to thread" right...
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    Amazing that I did a 14-part blog on this...

    Amazing that I did a 14-part blog on this in 2011 and nobody seems to have noticed. :)
  20. It would seem to me that the "sparse file"...

    It would seem to me that the "sparse file" notion, while present in some operating systems, isn't universal or universally useful. MS-DOS FAT, being a linked-allocation file system doesn't have it,...
  21. As I said, it might be possible, but not easy. ...

    As I said, it might be possible, but not easy. For example, in a sparse file, is it necessary for all extents to be present, or can you have a file that starts with, say, extent 23? The...
  22. No, I don't think that there are any "off the...

    No, I don't think that there are any "off the shelf" tools to copy sparse files. The problem is that there's no way for a program to determine sparseness using the plain high-level read/write APIs....
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    As long as the sound remains inside the car and...

    As long as the sound remains inside the car and doesn't pollute the environment like some guy with juiced-up bass on his ride cruising through your neighborhood at 3 AM... If the driver wants to...
  24. I'm not doubting that this could have been done...

    I'm not doubting that this could have been done in various ways that didn't involve tubes or transistors. I remember that a do it yourself morse typewriter from an issue of Radio Electronics in...
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    I had a need for a small SATA hard drive power...

    I had a need for a small SATA hard drive power supply for a test. I looked in my hellbox and turned up a wart for a Compaq 14" LCD display (very early; the backlights eventually went dim and it...
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