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libretro/emulators/fixnes.yml
2026-03-24 09:33:06 +01:00

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emulator: fixNES
type: libretro
core_classification: official_port
source: "https://github.com/libretro/fixNES"
upstream: "https://github.com/FIX94/fixNES"
profiled_date: "2026-03-23"
core_version: "Alpha v1.3.1"
display_name: "Nintendo - NES / Famicom (fixNES)"
cores:
- fixnes
systems:
- nintendo-nes
- nintendo-fds
notes: |
fixNES is an NES/Famicom emulator by FIX94 (same author as fixGB).
FDS games require disksys.rom (8192 bytes) in the system directory.
mapperInitFDS() in mapper.c:87-110 opens the file, validates exact
size 0x2000, reads into fdsBIOS[]. Returns false if missing or wrong
size. No hash validation.
Regular NES/NSF games need no BIOS.
No other system files loaded. system_dir accessed only for disksys.rom
(libretro/libretro.c:277-285, doOpenFDSBIOS).
files:
- name: "disksys.rom"
description: "Family Computer Disk System BIOS"
system: nintendo-fds
required: true
mode: both
size: 8192
validation: [size]
source_ref: "mapper.c:87-110 (mapperInitFDS), libretro/libretro.c:277-285 (doOpenFDSBIOS)"