emulator: fixGB
type: libretro
core_classification: official_port
source: "https://github.com/libretro/fixGB"
upstream: "https://github.com/FIX94/fixGB"
profiled_date: "2026-03-23"
core_version: "Alpha v0.8.2"
display_name: "Nintendo - Game Boy / Color (fixGB)"
cores:
  - fixgb
systems:
  - nintendo-gbc

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:
  - name: "gbc_bios.bin"
    system: nintendo-gbc
    description: "Game Boy Color (CGB-001) boot ROM"
    required: false
    hle_fallback: true
    size: 2304
    validation: [size]
    md5: "dbfce9db9deaa2567f6a84fde55f9680"
    sha1: "1293d68bf9643bc4f36954c1e80e38f39864528d"
    source_ref: "libretro/libretro.c:246-254 (doOpenCGBBootrom), mem.c:567-586 (memInitCGBBootrom)"
    notes: "Minimum 0x900 (2304) bytes. Only first 0x900 bytes read. Disabled via memDisableCGBBootrom() on register write."