GearSystem
Accurate open source Master System emulator
- Open SourceGitHub
- Ignacio SánchezDeveloper
- 3 SystemsSupported
- 24 Oct 2026Page Updated
Details
- Developer
- Ignacio Sánchez
- Source Code
- GitHub
- Page Updated
Supported Systems
Platform Support
- Windows
- Linux
- macOS
Screenshots
Overview
Gearsystem is a highly accurate, cross-platform Sega Master System emulator that also covers the Game Gear and SG-1000. It is written in C++ and is highly portable, running on Windows, Linux, macOS, Raspberry Pi and iOS.
It has a very accurate Z80 core that even implements the processor’s undocumented behaviour, so games run correctly, down to their small quirks. Gearsystem supports several cartridge mappers, including standard Sega cartridges, Codemasters cartridges and simple ROM-only cartridges.
Gearsystem also has highly accurate VDP emulation, including accurate timing.
It is one of the strongest and most portable emulators available for the Sega Master System.
Key Features
Accurate Z80 Core
Its Z80 core even implements the processor's undocumented behaviour.
Accurate VDP
Highly accurate VDP emulation, including accurate timing.
Cartridge Mappers
Supports Sega, Codemasters and simple ROM-only cartridges.
Highly Portable
Runs on Windows, Linux, macOS, Raspberry Pi and iOS.
