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# Gearboy - RetroBIOS

Type | libretro
Classification | official_port
Source | https://github.com/drhelius/Gearboy
Version | 3.4.1
Profiled | 2026-03-23
Cores | gearboy
Systems | nintendo-gb, nintendo-gbc

Technical notes

Gearboy is a Game Boy / Game Boy Color emulator by drhelius (Ignacio Sanchez). The buildbot builds from drhelius/Gearboy (upstream), not from libretro/Gearboy (abandoned fork frozen at v2.6.0 from 2018). Bootrom loading is gated behind core options (disabled by default). Without bootroms, the core HLE-skips the boot animation.

2 files | 0 required, 2 optional | 2 in repo, 0 missing | 2 with HLE fallback

`dmg_boot.bin` -optional, HLE available : Game Boy DMG bootrom

- Size: 256 B
- Validation: size
- Source: `libretro.cpp:208,211 Memory.cpp:601-606,699-738`
- Platforms: lakka, recalbox, retroarch, retropie

`cgb_boot.bin` -optional, HLE available : Game Boy Color bootrom

- Size: 2.2 KB
- Validation: size
- Source: `libretro.cpp:209,212 Memory.cpp:608-611,699-738`
- Platforms: lakka, recalbox, retroarch, retropie

Generated on 2026-03-25T14:56:43Z