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Type: Posts; User: jacobtohahn

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    Solved! Apparently, TASM creates a system...

    Solved! Apparently, TASM creates a system environment variable called "TASMTABS" pointing to the path where the table files are located. Hopefully this helps someone else in the future.
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    Table file open error on TASM

    Hi,
    I've been using TASM 3.2 to assemble files just fine for a while now, but today I'm having a very strange issue. I have a batch script set up that runs TASM to assemble a couple of files for a...
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    Oh, you're right. $20 is nothing for something...

    Oh, you're right. $20 is nothing for something like that. Do you think it would be possible to resell the card without the PROM? I don't need a second card and I don't think I will in the foreseeable...
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    Needed: Disk II Interface Card P5 PROM

    I’ve got an Apple II Plus that I’ve completely restored and cleaned, but the only problem is with the drive interface card. The PROM in socket P5 is destroyed. Seems like it went up in smoke at some...
  5. A quick update: I just finished applying and...

    A quick update:
    I just finished applying and cutting the decorative foil, and I’m very pleased with the results. It looks just like the original!
    Here’s a photo:
    61891
  6. That’s a good idea. I tested to see how much...

    That’s a good idea. I tested to see how much clearance the key caps have over the sheet when pressed, and it’s about 1/8”, so I have some margin for error. That also makes me wonder why the rubber...
  7. Good point. Honestly, I’m not quite sure why the...

    Good point. Honestly, I’m not quite sure why the metal sheet is there in the first place, or the rubber. Sound dampening sounds like a good theory.
    Do you have any ideas on a material I could use?...
  8. Wow, really? As in, the entire keyboard? If I...

    Wow, really? As in, the entire keyboard? If I could just get some kind of rubber that I could adhere/laminate onto the brass, this could be easy, certainly easier than buying a new kb. I just don’t...
  9. Help restoring an Apple II Plus keyboard

    My friend owns an Apple II Plus that he has kept in storage for many years. He recently took it out, but found that many keys didn’t work, or typed multiple characters, etc. He let me restore it for...
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    It's surprising that there's two supplies. My...

    It's surprising that there's two supplies. My issue with replacing the supply with one like a Meanwell is that I like the original look of the supply and transformer. I'm going to clean the rust off...
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    I took a look at the datasheet for the LM723 and...

    I took a look at the datasheet for the LM723 and immediately thought the same. It does look like a powerful chip, although complicated, but I might keep it in mind for other projects where I need...
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    Absolutely, but here I don't truly need the...

    Absolutely, but here I don't truly need the greatest efficiency and the lowest power dissipation. This drive won't be running incredibly long. I know quite a bit about linear supplies and their...
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    That's a good suggestion. I would rather keep the...

    That's a good suggestion. I would rather keep the original board (especially because my drive enclosure is missing the cover) and the transformer as well (I plan clean it up and remove the rust)....
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    Of course. I have a soldering station and I made...

    Of course. I have a soldering station and I made sure to keep it at low heat. My theory is that either the adhesive bonding the copper either wasn’t the best from the start or that it broke down some...
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    Shank, I know it's over a year later, but thanks...

    Shank,
    I know it's over a year later, but thanks for all of the info. I had to put the project to the side and moved during the summer. I'm slowly getting my collection and projects reorganized, and...
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    Help finding schematics for an old PCB

    Hey everyone,
    About a year ago, I picked up an 8" floppy disk drive on eBay, with an exclosure. The enclosure takes in wall power, puts it through a transformer, and rectifies the resulting AC into...
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    Wow, all this is pretty in-depth. I’ve been...

    Wow, all this is pretty in-depth. I’ve been pretty preoccupied with other things, but I’m currently reverse engineering the power supply board in the chassis. It was almost falling apart and the...
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    Yeah, that’s actually a good idea, especially now...

    Yeah, that’s actually a good idea, especially now that I’m getting more into computers with 8” drives. I’ll see what I can do with the parts.
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    I’m not quite sure how, but luck seems to be...

    I’m not quite sure how, but luck seems to be helping me out a bit! There just happens to be a listing for a very very similar MPI drive on eBay, for much cheaper than I would have thought, with the...
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    Hey, Until recently, everything seemed to be...

    Hey,
    Until recently, everything seemed to be working just fine on the drive. I tested my cable to see if there were any shorts (none) and I tested the head with a grounded wire, and it didn’t move...
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    Once I get home today, I’ll try your trick for...

    Once I get home today, I’ll try your trick for moving the head. I had tried to close all four switches, with no luck. Maybe there’s something else going on?
    As for the belt, I was able to get it...
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    Thanks, that’s helpful. I must have missed that...

    Thanks, that’s helpful. I must have missed that when I read the manual earlier. I have, however, closed one of them and didn’t get much progress. I’ll try again with each one tomorrow, but I’m not...
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    Here I am again. I’ve completely repaired the...

    Here I am again. I’ve completely repaired the drive, new belt, capacitors and everything. I also crimped my own IDC cable to connect to my Zenith Data Systems Z-100. The drive powers up and the...
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    Thanks for all the info! I was able to find a...

    Thanks for all the info! I was able to find a part number for the belt and contact a company that reports 11 in stock, so I’ll have to wait for a reply. I also contacted isellprojectorbelts.
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    Thanks, I did that. Apparently he hasn’t been...

    Thanks, I did that. Apparently he hasn’t been online in months. Any other potential solutions in case he doesn’t reply?
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