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Citra - RetroBIOS
Type standalone + libretro
Classification Community forks
Source https://github.com/libretro/citra
Upstream https://github.com/citra-emu/citra
Version Git
Profiled 2026-03-23
Cores citra
Systems nintendo-3ds
Technical notes

Citra 3DS emulator. Upstream taken down March 2024 (Nintendo lawsuit). Mirror: https://github.com/citra-mirror/citra Data dir: {save_dir}/Citra/ or {system_dir}/Citra/ ref: src/citra_libretro/citra_libretro.cpp:460-466

HLE for most services. Embedded open-source replacements for shared font, Mii data, country list, and bad word list compiled into the binary. ref: src/core/file_sys/archive_ncch.cpp:9-27, 133-167

firmware_count absent in .info (= 0). All files optional.

4 files | 0 required, 4 optional | 4 in repo, 0 missing | 1 with HLE fallback

aes_keys.txt optional in repo
AES encryption keys

  • Path: Citra/sysdata/aes_keys.txt
  • System: nintendo-3ds
  • Source: src/core/hw/aes/key.cpp:207-208 LoadPresetKeys()
  • Platforms: bizhawk, emudeck, retrodeck
  • needed for encrypted games

boot9.bin optional in repo
ARM9 bootrom

  • Path: Citra/sysdata/boot9.bin
  • System: nintendo-3ds
  • Size: 64.0 KB
  • Validation: size
  • Source: src/core/hw/aes/key.cpp:162-172 LoadBootromKeys(), src/core/hw/rsa/rsa.cpp:55-65 InitSlots()
  • provides AES and RSA keys

shared_font.bin optional in repo HLE fallback
system shared font (legacy format)

  • Path: Citra/sysdata/shared_font.bin
  • System: nintendo-3ds
  • Source: src/core/hle/service/apt/apt.cpp:259-267 LoadLegacySharedFont()
  • fallback to embedded open-source replacement font

seeddb.bin optional in repo
game seed database

  • Path: Citra/sysdata/seeddb.bin
  • System: nintendo-3ds
  • Source: src/core/file_sys/seed_db.cpp:13-27 SeedDB::Load()
  • Platforms: bizhawk
  • needed for seed-encrypted games (9.6+ titles), creates empty if missing

Generated on 2026-04-18T08:05:07Z