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Gearboy Git (2026/04/06) is a C++-based Nintendo Game Boy emulator emphasizing source code readability and strong compatibility. It features accurate CPU emulation, instruction and memory timing, and supports various Memory Bank Controllers (MBCs). Key functionalities include precise LCD controller emulation, sound emulation via SDL, Game Boy Color support, an integrated disassembler, save state functionality, and multi-platform compatibility across systems like Windows and Linux. Recent updates to the changelog include adding an ASCII format to the debugger’s watch values. Gearboy is designed to mimic the original Game Boy experience, including effects like LCD ghosting.
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Gearboy Git (2026/04/06) has been compiled. Gearboy is a Nintendo Game Boy emulator developed in C++. The focus of this emulator is on the readability of its source code, while maintaining good compatibility. Significant effort has gone into adhering to OOP principles and keeping the design straightforward.
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.
– Supports Memory Bank Controllers (MBC1, MBC2, MBC3 with RTC, MBC5), along with ROM + RAM and multicart cartridges.
– Faithful emulation of the LCD controller. Supports backgrounds, windows, and sprites, complete with correct timings and priorities, including mid-scanline timing.
– Frame mixing that replicates the LCD ghosting effect of the original Game Boy.
– Sound emulation using SDL Audio and the Gb_Snd_Emu library.
– Includes Game Boy Color support.
– Built-in disassembler capable of dumping the entire disassembled memory to a text file or providing real-time access.
– Can save battery-powered RAM cartridges to a file.
– Allows for save states.
– Supports compressed ROM formats (ZIP deflate).
– Features Game Genie and GameShark cheat support.
– Multi-platform compatibility. Runs on Windows, Linux, Mac OS X, Raspberry Pi, iOS, and as a libretro core (RetroArch).
Gearboy Git Changelog:
* [debugger] Added ASCII format to watch values
