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Gearboy Git (2026/03/06) is a Nintendo Game Boy emulator written in C++. It prioritizes readable source code while ensuring strong compatibility. Key features include accurate CPU and instruction timing, support for various Memory Bank Controllers (MBCs), and precise LCD emulation. Gearboy also simulates LCD ghosting effects and incorporates sound emulation using SDL Audio. It supports Game Boy Color, includes a disassembler, and can save battery-powered RAM to files. Additional functions include save states, compressed ROM support, and cheat codes. Gearboy is compatible across multiple platforms like Windows, Linux, Mac, and iOS, and functions as a libretro core.
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Gearboy Git (2026/03/06) has been compiled. Gearboy is a Nintendo Game Boy emulator developed in C++. It prioritizes source code readability while still achieving good compatibility. Significant effort has been invested to adhere to OOP principles while maintaining simplicity.
Gearboy Features:
– Highly precise CPU emulation, passing cpu_instrs.gb from blargg’s tests.
– Accurate instruction and memory timing, successful with instr_timing.gb and mem_timing.gb from blargg’s tests.
– Supports Memory Bank Controllers (MBC1, MBC2, MBC3 with RTC, MBC5), as well as ROM + RAM and multicart cartridges.
– Accurate emulation of the LCD controller: includes background, window, and sprite handling with correct timing and priority including mid-scanline timing.
– Frame mixing: replicates the LCD ghosting effect observed in the original Game Boy.
– Sound emulation utilizing SDL Audio and the Gb_Snd_Emu library.
– Support for Game Boy Color.
– Built-in disassembler that can export complete disassembled memory to a text file or access it in real-time.
– Ability to save battery-powered RAM cartridges to a file.
– Supports save states.
– Compressed ROM support (ZIP deflate).
– Game Genie and GameShark cheat support.
– Cross-platform compatibility: functional on Windows, Linux, Mac OS X, Raspberry Pi, iOS, and as a libretro core (RetroArch).
Gearboy Git Changelog:
* [libretro] Migration to core options v2
