{
  "commit": "fbe5ba4e3e790ab07eddc5b57e0f45a02cbcd60e",
  "count": 1,
  "generated_at": "2026-10-24T00:06:47Z",
  "items": [
    {
      "id": "fceumm_mod",
      "profile": {
        "core_classification": "community_fork",
        "core_version": "SVN",
        "cores": [
          "fceumm_mod"
        ],
        "display_name": "Nintendo - NES / Famicom (FCEUmm Mod)",
        "emulator": "FCEUmm Mod",
        "files": [
          {
            "description": "FDS BIOS ROM",
            "name": "disksys.rom",
            "note": "Read as one 8 KB PRG bank. A missing file or a short read fails the FDS load.",
            "required": true,
            "size": 8192,
            "source_ref": "src/fds.c:612-650, src/general.c:80-82",
            "system": "nintendo-fds",
            "validation": [
              "size"
            ]
          },
          {
            "description": "External NES color palette",
            "name": "nes.pal",
            "note": "Read at every game load when present, 768 bytes of RGB triplets. Applied when the fceumm_palette option is custom.",
            "required": false,
            "source_ref": "src/palette.c:191-212, src/fceu.c:289-290, src/drivers/libretro/libretro.c:1674-1682, 3013-3017",
            "system": "nintendo-nes"
          }
        ],
        "notes": "libretro-fceumm with the hardware extensions of fceux-mod (extra RAM,\nsprites, palettes and mappers). The libretro driver hands the system\ndirectory to FCEUI_SetBaseDirectory (src/drivers/libretro/libretro.c:2983-2984)\nand FCEU_MakeFName joins each name to it directly (src/general.c:70-97).\n\nThe Game Genie image is named gg.rom here (src/general.c:77-79), but\nFCEU_OpenGenie runs only when FSettings.GameGenie is set\n(src/fceu.c:283-285) and nothing in the libretro driver calls\nFCEUI_SetGameGenie (src/fceu.c:551-554), so the file is never opened.\n",
        "profiled_date": "2026-10-22",
        "source": "https://github.com/Tippek/libretro-fceumm-mod",
        "source_commit": "f0ea52190427b136a51da4490e49087fe2ca2abb",
        "systems": [
          "nintendo-nes",
          "nintendo-fds"
        ],
        "type": "libretro",
        "upstream": "https://github.com/libretro/libretro-fceumm"
      }
    }
  ],
  "kind": "emulators",
  "schema_version": 1
}