RGBtoHDMI Video Converter for Vintage Computers

The RGBtoHDMI is a specialized video converter designed to connect vintage computers to modern HDMI displays. Based on the open-source project by David Banks (Hoglet67) and Ian Bradbury (IanB), this device converts TTL video signals from classic systems into crystal-clear HDMI output using a Raspberry Pi Zero and programmable logic IC.

Why you want it: PIXEL PERFECT OUTPUT! Looks like an emulator output!

Features

• Optimized for 9-pin MDA, CGA, and EGA
• TTL Buffer board included
• Compact, desk-friendly form factor

Package Contents

Pre-assembled RGBtoHDMI PCB Raspberry Pi Zero Case 1GB SD Card (sometimes 8gb depending upon supply) USB Power Supply MiniHDMI to HDMI adpater

Full unit. No assembly required. The output of the raspberry pi zero is on miniHDMI, so an miniHDMI to HDMI adapter is included. You will need your own HDMI cable to connect to your monitor.

The CPLD is flashed with the latest version. The product has been tested on an MDA and CGA machine.

Technical Specifications

Compatibility This adapter is designed to work directly with vintage computers using a 9-pin D-Sub connector, including:

PC clones (MDA, Hercules, CGA, or EGA) Olivetti Prodest PC1 Commodore 128 (80-column mode)

Usage Connect the device to your HDMI monitor and power source, then use a straight-through 9-pin D-Sub cable (not supplied) to connect your vintage system. The on-screen menu allows you to select appropriate video profiles and sub-profiles for different video modes. Profile updates are available through the project's GitHub repository.

Understanding the versions I sell. This version includes the optional TTL buffer board, which serves two purposes, to provide protection for the CPLD and to bring the internal signals to the outside of the case.

The TTL buffer board can be removed and you could theoretically swap in an analog board, if you so desire.

If you don't need that, then buy the other version called "low cost" and save some money. Also this product requires that you have a standard 9-pin cable to go from your computer to the RGB to HDMI device. Often you can get that from the monitor you are replacing, but otherwise you will need to obtain a straight through 9pin cable.