Tag: brown fix

2 matching upgrades

Showing 2 products.

Status Product What it does Compatibility Links

Status	Product	What it does	Compatibility	Links
Sold outChecked Jul 30, 2026	CGA to RGB Convertorby Pyrofer's Projects rgbi cga analog rgb 15khz brown fix s video audio 80 column external adapter	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. Sources Pyrofer's Projects CGA to RGB Convertor page Pyrofer's Projects C128 CGA-to-RGB design history	Commodore 128 Exact model General PC hardware Bus/interface	CGA to RGB Convertor C128 CGA-to-RGB design history
Build itChecked Jul 30, 2026	rgbi2rgbaby Travis Durf (Markeno76) rgbi cga analog rgb rgbs 15khz brown fix s video composite video audio gerbers kicad published design diy	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. Sources Markeno76 rgbi2rgba repository Travis Durf design and BOM article Travis Durf assembly and test article	Commodore 128 Exact model General PC hardware Bus/interface	rgbi2rgba project and build files Design, schematic, and BOM notes Assembly and test notes

Sold outChecked Jul 30, 2026

CGA to RGB Convertorby Pyrofer's Projects

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.

Sources

Commodore 128 Exact model
General PC hardware Bus/interface

CGA to RGB Convertor C128 CGA-to-RGB design history

Build itChecked Jul 30, 2026

rgbi2rgbaby Travis Durf (Markeno76)

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.

Sources

Commodore 128 Exact model
General PC hardware Bus/interface

rgbi2rgba project and build files Design, schematic, and BOM notes Assembly and test notes