Gearboy Git Release (March 28, 2026)

Gearboy Git (2026/03/28) is a Nintendo Game Boy emulator written in C++, prioritizing code readability while ensuring strong compatibility. It features highly accurate CPU emulation, correct instruction/timing execution, and supports various Memory Bank Controllers (MBCs). Additional attributes include accurate LCD emulation, sound using SDL Audio, Game Boy Color support, an integrated disassembler, and save state functionality. It can save battery RAM to files and supports compressed ROMs and cheats. The emulator operates on multiple platforms, including Windows, Linux, macOS, iOS, and Raspberry Pi. The latest changelog includes several bug fixes and improvements across various functions.

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Gearboy Git (2026/03/28) has been compiled. Gearboy is an emulator for the Nintendo Game Boy, developed in C++. This emulator prioritizes source code readability while maintaining strong compatibility. Significant effort has been dedicated to adhering to OOP principles while ensuring simplicity.

Gearboy Features:
– Highly precise CPU emulation, successfully passing the cpu_instrs.gb tests by blargg.
– Accurate instruction and memory timing, passing instr_timing.gb and mem_timing.gb tests from blargg.
– Supports Memory Bank Controllers (MBC1, MBC2, MBC3 with RTC, MBC5), ROM + RAM, and multicart cartridges.
– Precise LCD controller emulation, with accurate background, window, and sprite timings and priorities, including mid-scanline timing.
– Frame mixing: Simulates the LCD ghosting effect typical of the original Game Boy.
– Sound emulation powered by SDL Audio and the Gb_Snd_Emu library.
– Compatibility with Game Boy Color.
– Built-in disassembler, capable of dumping the entire disassembled memory to a text file or providing real-time access.
– Saves for battery-powered RAM cartridges to files.
– Supports save states.
– Compressed ROM support (ZIP deflate).
– Cheats for Game Genie and GameShark.
– Multi-platform capability, with support for Windows, Linux, Mac OS X, Raspberry Pi, iOS, and as a libretro core (RetroArch).

Gearboy Git Changelog:
* Corrected DMG STAT timing
* Fixed EI to skip when already pending
* Merged branch ‘master’ of https://github.com/drhelius/Gearboy
* Corrected CGB STAT interrupt timing. Fix #149
* Blocked CGB palette writes during active rendering
* Fixed joypad dual selection. Fix #179
* Deferred IF.VBlank raise on CGB double speed. Fix #152, Fix #155
* Corrected HALT. Fix #166
* Fixed stat IRQ. Fix #158. Fix #167. Fix #154
* [mcp] Enhanced breakpoint functionality
* Improved timer
* Fixed memory breakpoints
* Enhanced MBC5
* Enhanced MBC2
* Enhanced MulitMBC1
* Enhanced MBC1
* Enhanced MBC3
* Reverted SDL_GetBasePath SDL_free calls
* [mcp] Enhanced agent skills
* Synced Android build configurations
* Merged pull request #213 from warmenhoven/warmenhoven/pr/android
* Fixed Android build issues
* Added missing 16-bit shift in Pow2Ceil rounding
* Freed SDL_GetBasePath memory to prevent leaks
* [libretro] Corrected HRAM descriptor length to exclude IE register
* Reset DIV counter on STOP opcode execution
* Prevented unsigned underflow in strncat_fit size calculation
* Masked upper nibble on MBC2 RAM reads
* Fixed carry flag computation for signed SP offsets
* Allowed MBC1 mode register writing regardless of RAM size
* [libretro] Synced autumn palette with desktop
* Honored enabled flag in retro_cheat_set call
* Fixed MBC1 bank high bits update logic