drhelius/Gearsystem

Sega Master System / Game Gear / SG-1000 emulator and debugger with embedded MCP server for macOS, Windows, Linux, BSD and RetroArch.

What it solves

Gearsystem is a high-accuracy emulator for classic Sega consoles (Master System, Game Gear, SG-1000) that integrates modern AI-assisted development tools. It bridges the gap between legacy hardware emulation and modern AI workflows by exposing the emulator's internal state to AI agents.

How it works

The project functions as a cross-platform C++ emulator that provides a comprehensive suite of debugging tools, including CPU breakpoints, memory inspection, and VRAM visualization. It distinguishes itself by embedding a Model Context Protocol (MCP) server. This server allows AI assistants (like Claude or GitHub Copilot) to connect to the emulator, enabling the AI to control execution, inspect memory, and perform reverse engineering or ROM hacking tasks through standardized agent skills.

Who it’s for

This project is for developers, retro-gaming enthusiasts, and researchers interested in reverse engineering, game hacking, or using AI agents to automate the analysis of legacy software and hardware behavior.

Highlights

  • Highly accurate emulation of Z80, VDP, PSG, and FM sound hardware.
  • Built-in MCP server for AI-assisted debugging and development.
  • Provides dedicated Agent Skills for automated code tracing, cheat creation, and memory modification.
  • Extensive cross-platform support, including standalone desktop apps and a Libretro core for integration into environments like RetroArch.
  • Advanced debugging features including JIT disassembler, trace logging, and multi-viewport support.

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