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Gearboy Git (2026/04/28) is a Nintendo Game Boy emulator developed in C++, prioritizing source code readability and good compatibility. It features accurate CPU emulation, instruction and memory timing, and supports various Memory Bank Controllers (MBCs). Key features include precise LCD emulation, sound using SDL Audio, Game Boy Color support, integrated disassembler, save states, and battery-backed RAM saving. It can run on multiple platforms such as Windows, Linux, macOS, Raspberry Pi, iOS, and as a libretro core for RetroArch. The latest update includes enhancements like connection status drawing.
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Gearboy Git (2026/04/28) has been compiled. Gearboy is an emulator for the Nintendo Game Boy, developed in C++. Its design emphasizes code readability while still achieving impressive compatibility. Significant effort has been made to adhere to OOP principles and maintain simplicity.
Key Features of Gearboy:
– Highly precise CPU emulation, passes cpu_instrs.gb based on blargg’s tests.
– Accurate timing for instructions and memory, passes instr_timing.gb and mem_timing.gb from blargg’s tests.
– Support for Memory Bank Controllers (MBC1, MBC2, MBC3 with RTC, MBC5), ROM + RAM, and multicart cartridges.
– Authentic LCD controller emulation, managing background, window, and sprites with accurate timings and priorities including mid-scanline timing.
– Frame mixing: Simulates the LCD ghosting effect observed in the original Game Boy.
– Sound emulation via SDL Audio and the Gb_Snd_Emu library.
– Compatibility with Game Boy Color.
– Built-in disassembler for dumping memory in text format or accessing it in real-time.
– Ability to save battery-powered RAM cartridges to file.
– Save state functionality.
– Support for compressed ROMs (ZIP deflate).
– Compatibility with Game Genie and GameShark cheats.
– Multi-platform support, operational on Windows, Linux, Mac OS X, Raspberry Pi, iOS, and as a libretro core (RetroArch).
Gearboy Git Changelog:
* [mcp] Connection status drawn
