Tag: cga

Converts Commodore 128 80-column RGBI into 15 kHz analog RGB for a compatible display or a separate VGA scaler.

The official site says sales resumed through its Square store in January 2024, but current stock was not independently confirmed on 2026-07-30. BIT-C-128 is not a scan converter: direct use requires a display that accepts roughly 15.75 kHz analog RGB. An ordinary VGA display also needs a GBS-8200, GBS-8220, or another suitable scaler. Supply regulated 5 V power and the cables or adapters required by the selected display path.

Converts digital RGBI into 15 kHz analog RGB and can break out a Commodore 128's 40-column S-Video and audio.

The maker lists the assembled board as out of stock and publishes no fabrication package. This is not a scan converter; the display must accept the source timing, normally about 15 kHz, or use a separate scaler. The maker's design history says the completed logic omits the valid intensity-only dark-gray color, which appears black. The board also passes 5 V to HD-15 pin 9; verify that the attached cable and display do not ground that pin.

Converts MDA, CGA, EGA, and Commodore 128 RGBI into 15 kHz analog RGB with selectable sync.

The maker labels the current project revision released, but its assembled Tindie listing said the seller was taking a break on 2026-07-30. The maker publishes a schematic but not a complete fabrication package. This is not a scan converter: an ordinary VGA display needs a GBS-8200, GBS-8220, OSSC, or another compatible scaler. The board requires 5 V through Micro-USB or a suitable GBS power connection.

Provides MDA and CGA-compatible display modes with 31 kHz VGA output for modern monitors and capture devices.

This is a self-assembly project. The maker advises checking for shorts between each power rail and ground before installation; the oscillator configuration also affects CGA composite color accuracy.

Converts Apple III or compatible Apple IIe TTL RGB to CGA-style and Apple IIgs-monitor outputs.

The current page offered a fully assembled option on 2026-07-24. It does not work with the Apple IIc. An Apple IIe Extended 80-Column RGB Card needs the documented jumper installed near its video header.

A buildable C128 and IBM CGA digital-to-analog video adapter with RGBS, RGBHV, and Commodore A/V pass-through options.

The repository publishes KiCad sources, Gerbers, a BOM, and printable cases for revision 1.3. The maker tested RGBI, composite, S-Video, audio, and GBS-Control output; revision 1.3 corrects the earlier monochrome pass-through error. This is not a scan converter. Use a compatible 15 kHz path such as GBS-Control or a suitable SCART converter. Never connect the C128 A/V power input and the external barrel power input at the same time. The maker found an ordinary SCART-to-HDMI box unstable in one 80-column game while GBS-Control remained stable.