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Gearboy Git (2026/03/31) is a Nintendo Game Boy emulator written in C++ with a focus on source code readability. It offers high compatibility and precise CPU emulation, passing various tests by blargg. Key features include accurate instruction and memory timing, support for multiple Memory Bank Controllers, precise LCD emulation with ghosting effects, and sound emulation using SDL Audio. Gearboy also supports Game Boy Color, integrated disassembler functionality, save states, and cheat codes like Game Genie. It runs on multiple platforms, including Windows, Linux, Mac OS X, and iOS. Recent updates fix rendering issues and improve video save states.
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Gearboy Git (2026/03/31) has been compiled. Gearboy serves as a Nintendo Game Boy emulator developed in C++. The emulator prioritizes the readability of its source code, while still maintaining solid compatibility. Significant effort has been made to adhere to OOP principles and ensure simplicity.
Gearboy Features:
– Highly precise CPU emulation, successfully passing cpu_instrs.gb from blargg’s tests.
– Accurate instruction and memory timing, passing instr_timing.gb and mem_timing.gb from blargg’s tests.
– Support for Memory Bank Controllers (MBC1, MBC2, MBC3 with RTC, MBC5), as well as ROM + RAM and multicart cartridges.
– Precise LCD controller emulation. Includes background, window, and sprites, with correct timings and priorities, including mid-scanline timing.
– Frame mixing: Simulates the LCD ghosting effect observed in the original Game Boy.
– Sound emulation utilizing SDL Audio and the Gb_Snd_Emu library.
– Game Boy Color compatibility.
– Built-in disassembler that can output the entire disassembled memory to a text file or access it in real time.
– Capability to save battery-powered RAM cartridges to a file.
– Save states functionality.
– Compressed ROM support (ZIP deflate).
– Support for Game Genie and GameShark cheats.
– Cross-platform compatibility. Operates on Windows, Linux, Mac OS X, Raspberry Pi, iOS, and as a libretro core (RetroArch).
Gearboy Git Changelog:
* Merged pull request #217 from warmenhoven/warmenhoven/pr/linux-aarch64
* Added linux-aarch64 build
* Fixed CGB VRAM writes, DMA timing, and LCD-off rendering. Addressed #206
* Resolved window rendering on WY match line. Addressed #151
* Enhanced video save state
