Gearboy and Geargrafx
These are ecosystem siblings—both are standalone emulator-debugger implementations that share the same embedded MCP server architecture and developer (drhelius) but target different hardware platforms (Game Boy vs. PC Engine), allowing users to choose the appropriate tool based on their debugging needs.
About Gearboy
drhelius/Gearboy
Game Boy / Gameboy Color emulator, debugger and embedded MCP server for macOS, Windows, Linux, BSD and RetroArch.
Implements cycle-accurate CPU and LCD emulation with support for multiple MBC cartridge types, mid-scanline effects, and battery-backed RAM. Features a comprehensive debugger with jit disassembly, breakpoints, memory inspection, and symbol file support (RGBDS, GBDK-2020, WLA-DX formats). Includes an embedded MCP server exposing execution control and hardware introspection for AI-assisted debugging with Claude and ChatGPT, plus libretro core integration for RetroArch.
About Geargrafx
drhelius/Geargrafx
PC Engine / TurboGrafx-16 / SuperGrafx / PCE CD-ROM² emulator, debugger, and embedded MCP server for macOS, Windows, Linux, BSD and RetroArch.
Provides cycle-accurate CPU and graphics emulation with a full debugger featuring breakpoints, memory inspection, tile/sprite viewers, and VGM recording capabilities. Includes an embedded MCP server exposing emulation state and execution control for AI-assisted debugging integration with Copilot, Claude, and similar tools. Distributes as both a standalone desktop application and as a Libretro core for RetroArch, with portable mode and drag-and-drop ROM loading.
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