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GearSystem Git (2026/02/02) is an open-source Sega Master System/Game Gear emulator developed in C++. It is designed for various platforms, including iOS, Raspberry Pi, Mac, Windows, and Linux, prioritizing source code readability and compatibility. Key features include an accurate Z80 core, multi-mapper support, external RAM with save files, automatic region detection, SMS2 224 mode support, an internal ROM detection database, sound emulation via SDL Audio, and an integrated disassembler for real-time memory access. Recent updates include full-screen modes and debugging fixes. Download and source information is available on GitHub.
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GearSystem Git (2026/02/02) has been compiled. GearSystem is an emulator for Sega Master System and Game Gear developed in C++. It is compatible with iOS, Raspberry Pi, Mac, Windows, and Linux. The primary aim of this emulator is to maintain clear, readable source code while ensuring high compatibility.
Features:
– Extremely accurate Z80 core.
– Multi-Mapper support, including SEGA, Codemasters, and ROM-only cartridges.
– Supports external RAM with save file functionality.
– Automatic region detection for NTSC-JAP, NTSC-USA, and PAL-EUR.
– SMS2 exclusive 224 mode support.
– Integrated internal database for ROM recognition.
– Sound emulation utilizing 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 using ZIP deflate.
– Cross-platform functionality, compatible with Windows, Linux, Mac OS X, Raspberry Pi, and iOS.
GearSystem Git changelog:
* Introduced fullscreen modes
* Merged branch ‘master’ from https://github.com/drhelius/Gearsystem
* [debugger] Corrected step frame
