BIT-C-128 Video DAC for Commodore 128/128D, IBM CGA, and Tandy CGA Plus

The BIT-C-128 Video DAC with a Gonbes video converter and power adapter is the cheapest and easiest combination to display high-quality 80-column video from a Commodore 128 or IBM CGA on newer VGA displays, including lightweight LCD flat panels.

Designed especially for Commodore 128 and 128D computers, the BIT-C-128 Video DAC has been carefully tuned to match the colors on the Commodore 1084S-D display and designed for manufacturing using modern design tools and surface-mounted components.

Key features:

Please see the links at the top of this page for more information about applications and how to get started, or to buy the video DAC and accessories.

For questions about this product, please contact me (John Carlsen).

News

2020 May 29: Due to postal service rate increases, I have increased shipping rates accordingly. To keep rates low for as many as possible, I have a new rate category for Australia and New Zealand, for which I need to charge slightly more for small packages.

Also, I am restocking accessories. If the checkout system tells you that I am out of stock on anything (or you would like me to carry something new), please let me know!

2020 April: Due to restricted movement during the COVID-19 pandemic, shipping may be slightly delayed. Thank you for your patience, and please stay safe!

Also, I added a page for frequently-asked questions (FAQs).

2020 January: The BIT-C-128 Video DAC circuit board is now in its sixth printing. Thank you for making BIT-C-128 the world's best selling video DAC for Commodore 128 and IBM CGA!

2019 January: I added a brief survey. Would you please give a little feedback on what you like and what you would like? Thanks!

Also, I added instructions on how to convert to HDMI.

2017 April-May: Enclosures are now being made for the BIT-C-128 Video DAC and/or the Gonbes GBS-8200 or GBS-8220. For details, see the How to Buy page.

2016 June: To celebrate its first anniversary, I'm publishing a 3-D PDF design proof of the BIT-C-128 Video DAC that I created a year ago. This file contains a three-dimensional model that may be viewed and turned in three dimensions with a modern Adobe PDF reader. (Older versions will display only a white page.)

Details

Details of the key features:

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