emulator: Citra 2018
type: libretro
source: "https://github.com/libretro/citra2018"
upstream: "https://github.com/citra-emu/citra"
profiled_date: "2026-03-18"
core_version: "Git"
display_name: "Nintendo - 3DS (Citra 2018)"
cores: [citra2018]
systems:
  - nintendo-3ds

notes: |
  Citra 2018 is a 2018 snapshot of the Citra 3DS emulator.
  Older than current Azahar/Citra — fewer firmware files.
  Data dir: citra-emu (not azahar-emu).
  ref: src/common/common_paths.h:24

  Uses RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY.
  ref: src/citra_libretro/environment.cpp:107

  Loads from sysdata/:
    aes_keys.txt (not keys.txt like current Citra)
    shared_font.bin
  ref: src/core/hw/aes/key.cpp:72-73, src/core/hle/service/apt/apt.cpp:174

  Does NOT load (added in later versions):
    boot9.bin, sector0x96.bin, seeddb.bin, otp.bin,
    movable.sed, SecureInfo_A, LocalFriendCodeSeed_B

  firmware_count absent in .info (= 0). Files are optional (HLE).

files:
  - name: aes_keys.txt
    system: nintendo-3ds
    required: false
    note: "AES encryption keys (named aes_keys.txt, not keys.txt like current Citra)"
    source_ref: "src/core/hw/aes/key.cpp:72-73"

  - name: shared_font.bin
    system: nintendo-3ds
    required: false
    hle_fallback: true
    note: "system shared font, HLE fallback if missing"
    source_ref: "src/core/hle/service/apt/apt.cpp:174"