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Gearboy Git (2026/01/06) is a Nintendo Game Boy emulator developed in C++ that emphasizes code readability while maintaining compatibility. It features highly accurate CPU emulation, precise instruction and memory timing, and supports various Memory Bank Controllers (MBC1-5). Additional capabilities include accurate LCD emulation, sound via SDL Audio, Game Boy Color support, and an integrated disassembler for real-time access. It also offers save states, battery-powered RAM cartridge support, compressed ROM support, and cheat functionality. Gearboy is multi-platform, functioning on Windows, Linux, Mac OS X, Raspberry Pi, iOS, and as a libretro core in RetroArch.
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Gearboy Git (2026/01/06) has been compiled. Gearboy is a Nintendo Game Boy emulator developed in C++. The main focus of the emulator is to ensure the source code is easily readable while maintaining good compatibility. Significant effort has been dedicated to adhering to object-oriented programming and keeping the design straightforward.
Key Features of Gearboy:
– Highly precise CPU emulation that passes all cpu_instrs.gb tests by blargg.
– Accurate instruction and memory timing, successfully passes instr_timing.gb and mem_timing.gb tests from blargg.
– Support for Memory Bank Controllers (MBC1, MBC2, MBC3 with RTC, MBC5), along with ROM + RAM and multicart cartridges.
– Emulation of the LCD controller with accuracy. Background, window, and sprites are rendered with correct timings and priorities, including mid-scanline timing.
– Frame mixing that replicates the LCD ghosting effect found on the original Game Boy.
– Sound emulation utilizing SDL Audio and the Gb_Snd_Emu library.
– Support for Game Boy Color.
– Integrated disassembler capable of dumping full disassembled memory into a text file or accessing it in real-time.
– Ability to save battery-powered RAM cartridges to file.
– Save states function.
– Compressed ROM support (ZIP deflate).
– Support for Game Genie and GameShark cheats.
– Multi-platform compatibility, operating on Windows, Linux, Mac OS X, Raspberry Pi, iOS, and as a libretro core (RetroArch).
Gearboy Git Changelog:
* [debugger] Fixed step frame
