For Amiga users looking to mirror their system’s RGB output to multiple displays, developer jbilander has created a practical and open-source solution: the Amiga RGB Video Splitter. With this compact circuit board, the Amiga’s native RGB signal can be routed to two display devices—whether monitors, upscalers, or capture hardware—without the signal degradation that often comes from daisy-chaining or passive splitters.
Simple Yet Effective Design
The Amiga Dual RGB Output approach uses standard 74-series logic chips and two LM1881 sync separators to handle horizontal and vertical syncs cleanly. This setup allows clean duplication of the RGBS signal, including optional support for buffered CSYNC. The schematic is clear, and the GitHub repository includes Gerber files for PCB fabrication, a bill of materials, and links to compatible component sources.
Importantly, the design avoids amplification or unnecessary complexity. Instead, it relies on buffered TTL-level outputs to prevent signal loading when using two devices simultaneously. Users can toggle optional features like 75Ω termination and CSYNC output with simple solder jumpers on the board. There’s no microcontroller, no configuration software, and no menu diving—just pure signal duplication from the Amiga to two destinations.
Compatible and Community-Friendly
The Amiga RGB Video Splitter supports all classic Amigas with a standard 23-pin RGB output. You’ll need a custom cable (23-pin to 15-pin header or similar), but once connected, it works seamlessly with modern devices such as OSSC, RetroTINK, and RGB CRTs.
The project is fully open source and licensed under MIT, encouraging modification and sharing. Jbilander’s GitHub also hosts a version with an audio pass-through, which routes Amiga audio alongside the video split, making it ideal for streamers or video capture setups.
Why This Project Matters
The Amiga Dual RGB Output project solves a common frustration among retro users—how to connect an Amiga to two devices at once without interference or signal loss. Whether for recording, live streaming, or simply previewing output on a second monitor, this board makes it easy.
With no active components to fail and no need for external power, it’s a solid choice for Amiga enthusiasts who want more flexibility from their video output setup.
