emulator: yabasanshiro
type: libretro
core_classification: official_port
source: "https://github.com/libretro/yabause/tree/yabasanshiro"
upstream: "https://github.com/devmiyax/yabause"
profiled_date: "2026-03-25"
core_version: "v2.6.8"
display_name: "Sega - Saturn (YabaSanshiro)"
cores:
  - yabasanshiro
systems:
  - sega-saturn

notes: |
  YabaSanshiro is a Sega Saturn emulator by devmiyax, forked from Yabause.
  Requires OpenGL 3.3 or OpenGL ES 3.0.

  Saturn BIOS search order:
    1. {system}/saturn_bios.bin
    2. {system}/sega_101.bin
    3. {system}/mpr-17933.bin
  First file found wins. Real BIOS required for normal operation.
  HLE available via yabasanshiro_force_hle_bios core option (deprecated,
  debug only).

  Addon cartridges: 1M/4M RAM expansion via core option (no files needed).
  ROM cartridge and MPEG card ROM loading disabled in libretro port
  (cartpath = empty, mpegpath = NULL).

  BIOS loading: libretro.c retro_load_game() lines 1048-1069.
  Core load: memory.c LoadBios() line 1353, T123Load() memory.h lines 219-280.

files:
  - name: "saturn_bios.bin"
    system: sega-saturn
    required: true
    hle_fallback: true
    note: "Primary Saturn BIOS. Any region accepted."
    source_ref: "libretro.c:1048"

  - name: "sega_101.bin"
    system: sega-saturn
    region: [japan]
    required: false
    hle_fallback: true
    note: "Saturn BIOS v1.01 (Japan). Fallback if saturn_bios.bin missing."
    source_ref: "libretro.c:1052"

  - name: "mpr-17933.bin"
    system: sega-saturn
    region: [north-america, europe]
    required: false
    hle_fallback: true
    note: "Saturn BIOS v1.003 (NA/EU). Last fallback."
    source_ref: "libretro.c:1056"