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GearSystem Git (2026/04/12) is a Sega Master System/Game Gear emulator developed in C++ for iOS, Raspberry Pi, Mac, Windows, and Linux, prioritizing readable source code and high compatibility. Key features include an accurate Z80 core, multi-mapper support, external RAM with save files, automatic region detection, and SMS2 224 mode support. It offers internal ROM detection, sound emulation via SDL Audio, and an integrated disassembler. Multi-platform compatibility extends to compressed ROMs (ZIP). Recent updates include documentation enhancements, bug fixes, and improved build instructions for OpenBSD. The source can be downloaded from the provided link.
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GearSystem Git (2026/04/12) has been compiled. GearSystem is an emulator for Sega Master System / Game Gear developed in C++ that is compatible with iOS, Raspberry Pi, Mac, Windows, and Linux. This emulator emphasizes clear source code while maintaining high compatibility.
Features:
– Accurate Z80 core.
– Supports multiple mappers: SEGA, Codemasters, and ROM-only cartridges.
– External RAM support with save file functionality.
– Automatic detection of region: NTSC-JAP, NTSC-USA, PAL-EUR.
– SMS2 exclusive 224 mode support.
– Internal database for ROM detection.
– Sound emulation utilizing SDL Audio and Sms_Snd_Emu library.
– Built-in disassembler capable of dumping the fully disassembled memory to a text file or accessing it in real time.
– Compressed ROM support (ZIP deflate).
– Cross-platform compatibility. Operates on Windows, Linux, Mac OS X, Raspberry Pi, and iOS.
GearSystem Git changelog:
* Updated README
* Merged pull request #151 from thiagoharry/openbsd-build
* Documentation: added OpenBSD build instructions
* [mcp] Added documentation resources. Resolved #146
* Fixed binary memory export issue
* Addressed undefined behavior in disassembler save
