fixGB

fixGB emulates Nintendo Game Boy Color. It reads 1 file, none of them required: it starts games without them.

About this profile

Detail	Value
Type	libretro
Classification	Official port
Source	https://github.com/libretro/fixGB
Upstream	https://github.com/FIX94/fixGB
Version	Alpha v0.8.2, stated in main.c
Revision	libretro/fixGB@c7865087b8c8
Profiled	2026-03-23
Profile	YAML, JSON
Cores	fixgb
Systems	Nintendo Game Boy Color

Install this emulator's files

The installer finds your setup and its BIOS folder, then downloads only the files this emulator reads there and checks each one.

Windows

Open the Start menu. Type PowerShell and open it. Paste the line. Press Enter.

PowerShell

&([scriptblock]::Create((irm https://abdess.github.io/retrobios/i.ps1))) --emulator fixgb

macOS

Open Terminal, in Applications, then Utilities. Paste the line. Press Return.

Terminal

curl -fsSL https://abdess.github.io/retrobios/i | sh -s -- --emulator fixgb

Linux

Open a terminal. Paste the line. Press Enter.

Terminal

curl -fsSL https://abdess.github.io/retrobios/i | sh -s -- --emulator fixgb

Steam Deck

Switch to Desktop Mode. Open Konsole. Paste with Ctrl+Shift+V. Press Enter.

Terminal

curl -fsSL https://abdess.github.io/retrobios/i | sh -s -- --emulator fixgb

Android (Termux)

Install Termux, a terminal app. Run pkg install python and termux-setup-storage once. Then paste the line. Press Enter.

Terminal

curl -fsSL https://abdess.github.io/retrobios/i | sh -s -- --emulator fixgb

On the device

Open a terminal on the device. Or connect from a computer with SSH, a terminal over the network. Paste the line. Press Enter.

Terminal

curl -fsSL https://abdess.github.io/retrobios/i | sh -s -- --emulator fixgb

Technical notes

Game Boy / Game Boy Color emulator by FIX94. Supports .gb, .gbc, and .gbs (Game Boy Sound) files. FIX94 maintains both standalone and libretro versions in the same upstream repo.

Optionally loads gbc_bios.bin from the system directory. Validates file size (>= 0x900 bytes), reads the first 0x900 bytes into memCGBBootrom[], sets cgbBootromEnabled. Enables the GBC startup animation and palette selection for DMG games.

Without the boot ROM, the core skips the boot sequence and starts games directly. No DMG boot ROM support in the source.

Files

1 file: 0 required, 1 optional. 1 has an HLE fallback.

In this collection: 1 in repo and 0 missing.

Optional

gbc_bios.bin optional in repo HLE fallback

Game Boy Color (CGB-001) boot ROM

• System: Nintendo Game Boy Color
• Minimum 0x900 (2304) bytes. Only first 0x900 bytes read. Disabled via memDisableCGBBootrom() on register write.

• Size: 2.2 KB, SHA1 1293d68bf964
• Collection copy: bios/Nintendo/Game Boy Color/GBC_cgb.bin
• Platforms: gbc_bios.bin: Batocera, KNULLI, RetroBat, ROCKNIX. bios/gbc_bios.bin: AmberELEC, EmuELEC, RetroDECK. cgb_bios.bin and cgb_boot.bin and gbc_bios.bin: Lakka, RetroArch, RetroPie. GAMEBOY/boot1.rom: MiSTer FPGA. GBC_cgb.bin: BizHawk. gbc/cgb_boot.bin and gbc/gbc_bios.bin: RomM. gbc/gbc_bios.bin: Recalbox

Hashes, validation and source

• SHA1: 1293d68bf9643bc4f36954c1e80e38f39864528d
• MD5: dbfce9db9deaa2567f6a84fde55f9680
• Validation: size
• Asked for by: libretro glue and emulator code, libretro port
• Source: libretro/libretro.c:246-254 (libretro glue), mem.c:567-586 (emulator code, libretro port)

Next steps

• Get your files, for the setup you play on
• Every system, and the files each one needs
• When a game does not start

Data as of 4 November 2026.