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GearSystem Git (2026/03/22) is an emulator for Sega Master System and Game Gear, developed in C++ and compatible with iOS, Raspberry Pi, Mac, Windows, and Linux. It emphasizes source code readability and high compatibility. Features include a highly accurate Z80 core, multi-mapper support, external RAM with save files, automatic region detection, SMS2 only 224 mode support, an internal ROM detection database, sound emulation via SDL Audio and Sms_Snd_Emu, an integrated disassembler, and support for compressed ROMs. Recent updates include feeding silence to the audio system during emulation pauses and fixing the hotkey dialog for non-US keyboards.
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GearSystem Git (2026/03/22) has been compiled. GearSystem is a Sega Master System / Game Gear emulator developed in C++ that operates on iOS, Raspberry Pi, Mac, Windows, and Linux. This emulator emphasizes the clarity of its source code while maintaining excellent compatibility.
Key Features:
– Precise Z80 core emulation.
– Support for multiple mappers: SEGA, Codemasters, and ROM-only cartridges.
– External RAM capability with save state functionality.
– Automatic region identification: NTSC-JAP, NTSC-USA, PAL-EUR.
– SMS2 exclusive 224 mode support.
– Internal ROM detection database.
– Audio emulation utilizing SDL Audio and the Sms_Snd_Emu library.
– Built-in disassembler that allows for real-time memory access or full memory dumps to a text file.
– Support for compressed ROMs (ZIP deflate).
– Cross-platform compatibility on Windows, Linux, Mac OS X, Raspberry Pi, and iOS.
Changelog for GearSystem Git:
* Silence audio output when emulator is paused
* Resolve hotkey dialog issues on non-US keyboard layouts
