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Gearboy Git (2026/04/12) is a Nintendo Game Boy emulator developed in C++, prioritizing source code readability while ensuring solid compatibility. Key features include highly accurate CPU emulation, precise instruction and memory timing, support for various Memory Bank Controllers (MBC), and an accurate LCD controller that mimics original Game Boy ghosting effects. It offers sound emulation, Game Boy Color support, an integrated disassembler, save state functionality, and cheat support. Gearboy is cross-platform, running on Windows, Linux, macOS, Raspberry Pi, iOS, and as a libretro core for RetroArch. Recent updates addressed documentation and fixed binary memory export issues.
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Gearboy Git (2026/04/12) has been compiled. Gearboy is a Nintendo Game Boy emulator developed in C++. This emulator emphasizes the readability of its source code while maintaining strong compatibility. A significant amount of work has been put into adhering to OOP principles and keeping the design straightforward.
Features of Gearboy:
– Highly precise CPU emulation, successfully running cpu_instrs.gb from blargg’s tests.
– Accurate instruction and memory timing, successfully passing instr_timing.gb and mem_timing.gb from blargg’s tests.
– Support for Memory Bank Controllers (MBC1, MBC2, MBC3 with RTC, MBC5), along with ROM + RAM and multicart cartridges.
– Accurate emulation of the LCD controller, handling background, window, and sprites with correct timings and priorities, including mid-scanline timing.
– Mixing frames: Simulates the LCD ghosting effect observed in the original Game Boy.
– Sound emulation leveraging SDL Audio and the Gb_Snd_Emu library.
– Support for Game Boy Color.
– Built-in disassembler, capable of dumping the entire disassembled memory to a text file or accessing it in real-time.
– Ability to save battery-powered RAM cartridges to file.
– Save states functionality.
– Compressed ROM support (ZIP deflate).
– Compatibility with Game Genie and GameShark cheat codes.
– Multi-platform support, running on Windows, Linux, Mac OS X, Raspberry Pi, iOS, and as a libretro core (RetroArch).
Changelog for Gearboy Git:
* Updated Readme
* Fixed write binary memory export
* Resolved undefined behavior in disassembler save
