Geargrafx

MCP.Pizza Chef: drhelius

Play HuCard and CD-ROM² games on Windows, macOS, Linux, or BSD, with save states, rewind, run-ahead, and up to five players. What makes it unusual is the link built into the app: assistants such as Claude, Copilot, or Codex can pause the running game, read its memory, inspect sprites, tiles, and sound, and rewind — handy if you are studying how an old game works or writing one yourself. It is free, and no account or key is involved.

Coding

Other

Use This MCP server To

Play a TurboGrafx-16 game on my laptop Ask an assistant what the game is doing right now Inspect the sprites and tiles a game is drawing Step through code while a game runs to find a bug Rewind a few seconds after a mistake

README

Geargrafx

Geargrafx is a very accurate, cross-platform TurboGrafx-16 / PC Engine / SuperGrafx / PCE CD-ROM² emulator written in C++ that runs on Windows, macOS, Linux, BSD and RetroArch, with an embedded MCP server for debugging and tooling.

This is an open source project with its ongoing development made possible thanks to the support by these awesome backers. If you find it useful, please consider sponsoring.

Don't hesitate to report bugs or ask for new features by opening an issue.

Downloads

Geargrafx FAQ

Which systems does it emulate?

PC Engine, TurboGrafx-16, SuperGrafx, and the CD-ROM² family, including physical discs.

Do I need anything extra for CD games?

Yes — CD-ROM games need a system BIOS file, which the emulator does not ship with.

Can I use this to debug a game I am writing myself?

Yes — your assistant can control execution, read memory, and report hardware status while the game runs.

Does it cost anything?

No — it is free and open source, with no account or key required.

Where can I run it?

Windows, macOS, Linux, and BSD as a standalone app, plus RetroArch as a core on many more devices.

Which assistants can connect to it?

GitHub Copilot, Claude, Codex, and other MCP-compatible tools.