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GearSystem Git (2026/04/15) is a Sega Master System/Game Gear emulator developed in C++ that operates on iOS, Raspberry Pi, Mac, Windows, and Linux. It prioritizes source code readability and high compatibility, featuring an accurate Z80 core, multi-mapper support, external RAM with save files, automatic region detection, SMS2-only 224 mode support, an internal ROM detection database, and sound emulation via SDL Audio. It also includes an integrated disassembler for real-time access and dumping memory. The latest update added a CPU filter to the trace logger, fixed several bugs, and enhanced features. Download is available through the provided source link.
GearSystem Git (2026/04/15) has been compiled. GearSystem is an emulator for the Sega Master System and Game Gear, developed in C++, compatible with iOS, Raspberry Pi, Mac, Windows, and Linux. This emulator prioritizes source code readability while maintaining excellent compatibility.
Features:
– Accurate Z80 core implementation.
– Multi-Mapper support for SEGA, Codemasters, and ROM-only cartridges.
– External RAM functionality with save file support.
– Automatic region detection for NTSC-JAP, NTSC-USA, and PAL-EUR.
– SMS2 exclusive 224 mode support.
– Built-in database for ROM detection.
– Sound emulation using SDL Audio along with the Sms_Snd_Emu library.
– Integrated disassembler that can export the entire disassembled memory to a text file or provide real-time access.
– Support for compressed ROMs (ZIP deflate).
– Multi-platform compatibility: runs on Windows, Linux, Mac OS X, Raspberry Pi, and iOS.
GearSystem Git changelog:
* [debugger] Introduced CPU filter to the trace logger
* Resolved issues with output stream seek and tell operations
* Adjusted ROM buffer to encompass all addressable banks
* Corrected odd bank pairing during 16KB writes
* Fixed unused variable warning in libretro builds
