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GearSystem Git (2026/04/03) is a Sega Master System/Game Gear emulator developed in C++ that operates on iOS, Raspberry Pi, Mac, Windows, and Linux. It emphasizes source code readability and offers high compatibility. Key features include a precise Z80 core, support for multi-mappers and external RAM with save files, automatic region detection, SMS2-specific modes, and an internal ROM detection database. It also utilizes SDL Audio for sound emulation and includes an integrated disassembler. Recent updates improved SG-1000 mapper detection and added bounds checks. The emulator supports compressed ROM files and is available for multiple platforms.
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GearSystem Git (2026/04/03) has been compiled. GearSystem is an emulator for Sega Master System / Game Gear, developed in C++ and compatible with iOS, Raspberry Pi, Mac, Windows, and Linux. This emulator prioritizes readable source code while achieving high compatibility.
Features:
– Highly precise Z80 core.
– Support for multiple mappers: SEGA, Codemasters, and ROM-only cartridges.
– External RAM capability with save file support.
– Automatic region detection for NTSC-JAP, NTSC-USA, PAL-EUR.
– SMS2 only 224 mode support.
– Internal database for ROM detection.
– Sound emulation using SDL Audio and Sms_Snd_Emu library.
– Built-in disassembler, capable of dumping the entire disassembled memory to a text file or accessing it in real time.
– Compressed ROM support (ZIP deflate).
– Multi-platform: Works on Windows, Linux, Mac OS X, Raspberry Pi, and iOS.
GearSystem Git changelog:
* Enhanced SG-1000 mapper detection and forced config. #150
* Added bounds check to TraceLogger GetEntry
* Improved SG-1000 detection and mapper. Fixed #150
