Wednesday, March 5, 2014

Commodore 128/ CGA Video DAC Board Available

I just completed a new build of Richard42's fantastic Commodore 128 video DAC board.  This is a fantastic little board that, in combination with a Gonbes GBS-8220 arcade RGB scaler, produces great 16 color, with intensity, output on any modern VGA monitor.  To boot, the combination also works great with IBM CGA or low-res EGA cards!

I did two rounds of prototypes, and the following is what the final board looks like.  Please excuse the poor quality of my living-room photos.

Video DAC Front
Video DAC Back
I am now making these available to the vintage community for the price of what the components cost me, plus shipping.

If you would like to purchase one, I am offering several different ways to get it.

Please let me know if you have any comments. I'll work on getting some screenshots, as I was referring to some posted on Commodore128.org, but that forum seems to have gone down, rather unexpectedly.
Posted by at
Labels:

24 comments:

  1. drjimJuly 20, 2015 at 4:55 PM

    HI.

    Are these still available?

    ReplyDelete
  2. AlexanderJuly 21, 2015 at 7:00 PM

    Yep. I just stopped building them, as I don't have the spare time. I can sell you a PCB or a kit.

    ReplyDelete
  3. drjimJuly 21, 2015 at 7:16 PM

    The kit version is fine. I've been kit building and scratch building for about 50 years, si I think I can handle it!

    :-)

    Just buy a kit via PayPal OK??

    Thanks!

    ReplyDelete
  4. AlexanderJuly 21, 2015 at 7:18 PM

    Sure. Just add it, and international shipping, if you need it, to your cart, and check out.

    ReplyDelete
  5. AlexanderAugust 2, 2015 at 11:30 AM

    I'm going to discontinue availability of the kit, for now, as my daughter was just born. I hope to continue availability, in the future.

    ReplyDelete
  6. drjimAugust 2, 2015 at 3:20 PM

    Congrats!

    Will I still receive the one I ordered?

    ReplyDelete
  7. AlexanderAugust 19, 2015 at 5:32 PM

    All previous orders will be filled. Sorry for the worries!

    ReplyDelete
  8. UnknownSeptember 7, 2015 at 3:52 AM

    This comment has been removed by the author.

    ReplyDelete
  9. AlexanderSeptember 7, 2015 at 10:51 AM

    Dominik,

    I haven't received any orders from you. Unfortunately, I am not accepting orders, at this time. I will post, again, when orders can be fulfilled.

    Thanks!
    - Alex

    ReplyDelete
  10. UnknownNovember 12, 2015 at 1:27 PM

    Hello, Interested In this device. When it will be available for purchase?

    ReplyDelete
  11. johnlogicFebruary 8, 2016 at 2:24 PM

    In July 2015, I introduced an improved version of Richard's design. It's available via Amazon for $50 + S&H, or save $5 by using PayPal at < http://www.bit-c-128.com >.

    ReplyDelete
  12. wfpApril 19, 2017 at 8:10 AM

    Do you have dimensions for this board, or a drawing with measurements? I've had a couple of requests to build mounts for it for my Commodore 128 VGA Module enclosures.

    ReplyDelete
  13. AlexanderApril 19, 2017 at 3:08 PM

    wfp,

    The board design is available, through OSH Park. Go to https://oshpark.com/shared_projects/9MPsJlrJ to see it. You can get the dimensions from there.

    Good luck!

    - Alex

    ReplyDelete
  14. UnknownFebruary 19, 2018 at 6:10 AM

    This comment has been removed by the author.

    ReplyDelete
  15. cyberdefensedaveFebruary 23, 2018 at 11:53 AM

    Errr... I seem to be missing the "connect wire X to post Y" directions... Help!

    ReplyDelete
    Replies
    1. AlexanderFebruary 27, 2018 at 10:12 AM

      David,

      Please reference this other post, on my blog:
      http://he-insanity.blogspot.com/2014/03/video-dac-assembly-information.html

      Good luck!
      - Alex

      Delete
  16. NeilApril 25, 2018 at 7:00 PM

    FWIW: These seem to be incredibly cheap on eBay. And already assembled.

    New RGB CGA EGA YUV to VGA HD Video Converter Board Moudle HD9800 GBS8200

    (ebay 362299529454)

    ReplyDelete
    Replies
    1. AlexanderApril 26, 2018 at 2:38 PM

      That auction is part of the solution, yes, but you will also need something like this:
      https://www.ebay.com/itm/GGLABS-CGA2RGB-Commodore-Tandy-PC-digital-RGBI-to-analog-RGB-converter-C128-DAC/401220864442?hash=item5d6aa089ba:g:W~0AAOSw8lpZGQ3Y

      Delete
  17. UnknownOctober 18, 2018 at 7:57 PM

    Hi, do you have 1 kit for sale or 1 board. If yes please tell me how I can buy it from you. Thank you

    ReplyDelete
  18. AlexJanuary 21, 2019 at 3:26 PM

    Where can I find a kit with the brown fix? Or the link to the items? Thank you

    ReplyDelete
  19. AlexanderJanuary 21, 2019 at 4:01 PM

    You can look up the previous comments to see that there is a new source, using a similar design from:
    http://www.bit-c-128.com

    - Alex

    ReplyDelete
  20. AlexJanuary 21, 2019 at 6:23 PM

    Ok excellent. I have a XRGB-mini Framemeister then can I connect the http://bit-c128.com to the c128 then the output of the http://bit-c128.com to a scart cable to 8 pins RGB of the Framemeister and not use the GB 8220? Or what would be the best for the 80 columns and all colors?

    ReplyDelete
    Replies
    1. AlexanderJanuary 25, 2019 at 3:52 AM

      I don't know anyone who has tried a Framemeister. It seems possible, though. What does work, for sure, are the bit DAC + GBS8220, or the https://www.serdashop.com/MCE2VGA, or http://www.retrotink.com/.

      Delete

Subscribe to: Post Comments (Atom)