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  1. snuci

    Blue monochrome LCD screen issue?

    While browsing on eBay, I've looked at two identical model laptops and one has a very dark uniform blue screen when not turned on (left picture). The other has a blue outlined screen that does not look too great (right picture). I've seen this many times before but assumed the right laptop...
  2. snuci

    RCA VP-3501?

    I wonder if that power supply would be compatible with an RCA VP4801? I have one of those but no power supply. I'll have to look around again to see if I can find a pinout.
  3. snuci

    PLA - PLS100N vs PLS100F

    Would you happen to know what bits or is there a document that describes the difference? I've tried a couple of JEDEC files that didn't work and I would be curious to see if I can modify them and re-try them the next time I have that computer on the bench.
  4. snuci

    PLA - PLS100N vs PLS100F

    I had similar concerns with the Signetics equivalent 82S100 ceramic chips when I bought them with a mild certainty that they would work but I wouldn't know for sure until I programmed one. They are exactly the same. They also fry the same if accidentally put in upside down :( I use a TopMax II...
  5. snuci

    MITS Keyboard

    I am curious what card that was connected to. Makes sense that they would resell a keyboard at some point. I had personally never seen one before with a MITS label on it.
  6. snuci

    Any Tricks to Distinguish a Compucolor 8001 from an Intercolor 8001?

    I wish you luck with your restoration.
  7. snuci

    KIM-1 Repairs continue

    Falter, I have one of Dwights KIM-1 debug boards. If it helps, I can send it to you but I need it back. Still have a couple of KIM-1s I have to fix myself. PM me if you'd like me to send it. Santo
  8. snuci

    Southwest RDI Tadpole looking for a new home

    Which model? Where are you located?
  9. snuci

    Imsai VDP 80 Thoughts

    I have one. I don't remember if the drive is a Persci 277 or 299 but it will require some maintenance. My own VDP-80 is not running but I have not attempted a restoration yet. If the drive is a Persci 277, there is a guide by Martin Eberhard that can help you restore it. I used it for the...
  10. snuci

    What are the top 10 rarest vintage computer bits you own?

    Did it have any documentation? I didn't see any in the pictures. I have a couple of Hyperdrive systems. A complete kit would be pretty cool.
  11. snuci

    EEPROM availability 2532 & 2732 replacements.

    I know I am not answering your question but I had a GQ-4X and I ended up getting another programmer. The ME2700 does these chips. I later upgraded to a EEtools Topmax II for USB support. If you are going to do a lot with these types of chips, it might be worth looking at an alternative...
  12. snuci

    Use a 5.25" HD floppy to emulate a Tandon TM100-4?

    Yes, I used the latest FlashFloppy on one (flashed it a couple days ago). I also have a genuine HxC Gotek and no dice there either. That said, I did use the HxC emulation on the FlashFloppy Gotek and did not use straight up Flashfloppy. If you have a pointer to the TRS-80 config settings and...
  13. snuci

    Use a 5.25" HD floppy to emulate a Tandon TM100-4?

    Just wanted to circle back and say that I was able to get a 3.5" floppy drive to work but I had to go through a few of them before I found one that would work. A normal PC floppy drive would not work. I had to go with a Chinon FZ-357 and the jumpers has to be set like the picture below. Note...
  14. snuci

    IBM 5100 Keyboard Issue

    Beam spring info: https://deskthority.net/wiki/Beam_spring As for testing, the only way I know how is to have the keyboard installed and pressing keys. If you have no response or intermittent response, you should check the logic on the keyboard and check the cable on both ends. It is a bit...
  15. snuci

    IBM 5100 Keyboard Issue

    Be very careful with the beam spring key switches. When one of those plates falls off, they are a pain to get back on. The ICs are IBM part numbers but you can check them against this cross reference list...
  16. snuci

    Use a 5.25" HD floppy to emulate a Tandon TM100-4?

    Forgive the crudeness as I was trying to line up pins. Here is a rough drawing I made. Left side is the 34 pin card edge connector on the floppy drive, right side is the DB37 connector on the Nabu 1600 computer. It does need READY/ on Pin 34 and 2 is not connected on the DB37. I made a cable...
  17. snuci

    Use a 5.25" HD floppy to emulate a Tandon TM100-4?

    I have a NABU 1600 8086 based computer that should utilize a Tandon TM100-4 drive. It runs CP/M 86 and QNX and I have disk images from Dave Dunfield's site. This computer doesn't have the mass storage unit (including the floppy drive) so is it easy to emulate a Tandon TM100-4 drive (96TPI) on a...
  18. snuci

    I walked into a junk shop and walked out with a Dynalogic Hyperion!

    @VileR, check here: https://vintagecomputer.ca/files/Dynalogic%20Hyperion/firmware/ I just uploaded it. I didn't realize I didn't have it up there already. Hope this helps, Santo
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