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    I don't think so. I think it just starts moving...

    I don't think so. I think it just starts moving from wherever it happens to be.
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    I successfully made a new boot disk just on 5.25...

    I successfully made a new boot disk just on 5.25 media.. but same deal. It just does this over and over again until the head is as far as it can go.

    https://youtu.be/78c7SAXtDzc

    I'm becoming...
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    If you're willing to provide that I would be...

    If you're willing to provide that I would be grateful. First trick though is remembering which of my PCs works with IMD. Ive tried two now that are Pentium and P2 class with no luck. Gotta keep...
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    IMD always seems to need much finaglement from...

    IMD always seems to need much finaglement from me. It is *very* particular about which hardware it runs on. Now I just gotta remember which one worked last time.. :)
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    Darn. Yeah.. that's what I was afraid of. You...

    Darn.

    Yeah.. that's what I was afraid of. You almost need a second, working 2K as a test bed. Another option as I understand it is I can use a 720k 3.5 drive with these. Maybe do an image of...
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    Many thanks. The problem seems to be eerily...

    Many thanks.

    The problem seems to be eerily similar to the issue I had with my Tandy 1000. In that situation, a bad gate in a 7432 (I think) was preventing the drive from actually trying to read...
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    Darn.. that wasn't the issue. Oh well. Was...

    Darn.. that wasn't the issue. Oh well. Was hoping for a quick win there. At least I know the main FDC chips are good. I *think* the drives are okay, although I haven't found a way to test them...
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    Doh.. Typed me numbers backwards. Thanks for the...

    Doh.. Typed me numbers backwards. Thanks for the catch and the answer Chuck!! :)
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    Tandy 2000 FDC chip question

    I have a Tandy 2000 that will not boot. It gamely tries to read disks (which seem to be good), but basically on boot it will just move the head up towards the center of the disk, stop, then move it...
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    Apricot F2 Keyboard

    Picked up a working Apricot F2 for not very much at all.. but sans keyboard which I understand is a proprietary wireless deal. If anyone out there has one they'd not mind parting with please let me...
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    What sort of oil/grease would be recommended for...

    What sort of oil/grease would be recommended for this sort of thing?

    The disk doesn't seem to spin until you insert the disk and engage the drive. It does seem to center better when the motor is...
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    Interesting. I had a last minute thought. I...

    Interesting.

    I had a last minute thought. I swapped the old FDC chip back in. Drive stopped working, but keyboard worked! Wha...

    Luckily I bought 2 FDC chips.. plugged the other one in.. now...
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    Okay so I got a replacement FDC9216 (or was it...

    Okay so I got a replacement FDC9216 (or was it 8216) chip, and it boots! Fantastic! Thought I could finally put this together, get it off my bench and carry on with my play space renovation.
    ...
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    Thanks maxtherabbit! You're referring to the...

    Thanks maxtherabbit! You're referring to the shaft and spring between the 'plate' and the cone?

    The cone looks like it goes down smoothly every time, no shifting. Only thing that seems to...
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    IBM YD 360k Drive 'bouncy'

    Weird one - I'm trying to put this 5162 back together and away so I can finish rearranging my space, and I tried booting off the floppy drive, only to discover it wouldn't. As I looked at it, I...
  16. Thread: Microkit 8/16

    by falter
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    Thanks Dave! Sorry I've dropped off on the...

    Thanks Dave! Sorry I've dropped off on the Netronics setup! Work + covid have made things a little crazy.

    I appreciate your efforts with this. I actually bought a 1702 reader kit board that I'm...
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    Also it looks like there was some repair work...

    Also it looks like there was some repair work done with the innermost S100 slot.. he's got jumper wires there that appear to connect the same points as the tracks did. I don't see evidence these...
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    Ok so we have a wire going from J2 pin 22 (?...

    Ok so we have a wire going from J2 pin 22 (? there aren't 24 pins but 24 is right next to the last pin in the line) to pin 33 of U105
    We have a wire from S17 to pin 25 of U105 also.
    We have a wire...
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    I was looking at something like this: ...

    I was looking at something like this:

    https://www.ebay.com/itm/293272782936

    The Microbee uses an external brick supply, so I suppose that's easy to remedy. The monitor is curious.. in a...
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    No worries. I think we have something custom...

    No worries. I think we have something custom going on here.. I'm poring over schematics and comparing to these jumper wires he has around. I note the machine usually powers up in a ready state,...
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    Hi Dave, Unfortunately I had some family...

    Hi Dave,

    Unfortunately I had some family events so I didn't get to play with the Netronics machine much at all. I did install a 74LS20 (a few of them actually), just to see what would happen.....
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    Yes switches are set as you prescribed. C000...

    Yes switches are set as you prescribed.

    C000 is in U300.. and it goes on from there.

    Here's a pic of the full board: ...
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    The EPROMs are four 2716s. I was comparing the...

    The EPROMs are four 2716s. I was comparing the first of them, labeled C000-C7FF to what is actually showing up at C000-C7FF.
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    220v to 110v converters

    I just purchased some Microbee stuff and they are 220v. So I was wondering what I should be looking for in terms of wattage and quality for a 110v to 220v converter.. stuff to look out for? Is one...
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    Okay so I set the jumpers both ways you mentioned...

    Okay so I set the jumpers both ways you mentioned above... but yeah.. no change.

    I decided just to do some perfunctory checks and verified the ROMs with my EPROM programmer using known good dumps...
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