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Thread: Who knows something about the old NEC PC-6001A around here?

  1. #21

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    The 16K RAM board works beautifully, the system comes up 32K now and I made a memory test program to test it which is working great.

    The ROM board was a little more trouble. This PCB has a couple of issues that I will need to resolve. The 74LS00 SO IC is wider than the footprint I used for it so I had to cut the pins a bit off and bend them to make them contact the PCB. Also, I forgot to put a hole in the back of the PLCC so it could be pushed out if seated too deep. One of the 12V rails didn't have enough solder mask and was shorted to ground resulting in a very bizarre video of odd characters and lines. Once I fixed that it began working as expected. I can finally load extended basic!

    The little switch on top allows you to enable or disable the board without having to unplug it...

    pc6pcbs2.jpg

  2. #22

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    The 16K RAM board works beautifully, the system comes up 32K now and I made a memory test program to test it which is working great.
    Wow, how cool!, a pity that the ROM board proto has some flaws. As per the pic, you haven't tested yet the full ROM space installing the DIP Switch; but I suppose that after your fixes all must work fine.

    About the PLCC, can't you drill a hole throug PLCC socket and PCB?

    I have the 6001's cassette player. PC-6082, no cables. I also have a 6001A but I have done nothing much with it.
    The PC-6001/NEC Trek is a not too fancy machine, a Z80 paired with the dreaded 6847 it's not even a novelty, Laser machines (200,300) are pretty similar. It's simply a nice and robust machine, easily expandable and from the point of view of USA consumers, a rare bird.

  3. #23

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    Quote Originally Posted by jltursan View Post
    Wow, how cool!, a pity that the ROM board proto has some flaws. As per the pic, you haven't tested yet the full ROM space installing the DIP Switch; but I suppose that after your fixes all must work fine. About the PLCC, can't you drill a hole throug PLCC socket and PCB?
    For $4.90, I'll order some revised ROM boards to correct the issues. I wasn't sure which dip switch I wanted to install as I've got another one coming, but I finally just threw it on there since there were other issues anyway. I thought about drilling a hole, and I may still do that on this one. It worked pretty smoothly switching from one ROM to another, I even tried a custom ROM I made using z88dk and it also worked which was pretty cool.

  4. #24

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    I still haven't laid out the FDD emulator board yet, but I did make a board that I hope will dump a ROM. A guy on eBay bought a collection that came with a number of cartridges that I've never seen dumped before.

    Here is my cartridge dump board - it will use a FTDI USB to TTL level serial cable to do a hex dump of the ROM to a PC.


  5. #25

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    My cartridge dump tool is working. I'm going to get it off to the guy who has some cartridges to dump.

    cart1.jpg

    cart2.jpg

    cart3.jpg

  6. #26

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    Great news!, never seen a Nec Trek cart so close before
    Btw, which ones are the carts that guy has bought?

  7. #27

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    Ones I have from a tosec collection:

    N60 Extended BASIC
    The Curse of Crowley Manor (RAM=16k)
    Moon Raiders (RAM=32k)
    Canyon Climber
    The Electric Pencil (RAM=32k)
    Music Editor
    Micro-Painter
    Touch Panel

    Ones he has gotten in the auction that I don't have:

    Chicken
    Mazes & Monsters
    Video Calc
    Meteor Evader
    Sea Bomber
    Pillbox
    Shamus

  8. #28

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    Quote Originally Posted by alank2 View Post
    My cartridge dump tool is working. I'm going to get it off to the guy who has some cartridges to dump.

    cart1.jpg
    People tell me I'm wrong when I pronounce NEC as "neck"... they insist it should be said as letters (N.E.C.).

    But doesn't the name "NEC Trek" imply that NEC meant for it to be pronounced "neck", at least in America?

  9. #29

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    I agree with you. I've always called is "neck" not that that means I'm right!

  10. #30

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    I've worked on tons of NEC PBX's primarily in the NEC NEAX series and the name was always spoken as "neck knee-ack" even during training.

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