yabasanshiro - RetroBIOS

Type	libretro
Classification	Official ports
Source	https://github.com/libretro/yabause/tree/yabasanshiro
Upstream	https://github.com/devmiyax/yabause
Version	v2.6.8
Profiled	2026-03-25
Cores	yabasanshiro
Systems	sega-saturn

Technical 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.

3 files | 1 required, 2 optional | 3 in repo, 0 missing | 3 with HLE fallback

saturn_bios.bin required in repo HLE fallback

• System: sega-saturn
• Source: libretro.c:1048
• Platforms: batocera, emudeck, lakka, recalbox, retroarch, retrobat, retrodeck, retropie, romm
• Primary Saturn BIOS. Any region accepted.

sega_101.bin optional in repo HLE fallback japan

• System: sega-saturn
• Source: libretro.c:1052
• Platforms: batocera, emudeck, lakka, recalbox, retroarch, retrobat, retrodeck, retropie, romm
• Saturn BIOS v1.01 (Japan). Fallback if saturn_bios.bin missing.

mpr-17933.bin optional in repo HLE fallback north-america, europe

• System: sega-saturn
• Source: libretro.c:1056
• Platforms: batocera, emudeck, lakka, recalbox, retroarch, retrobat, retrodeck, retropie, romm
• Saturn BIOS v1.003 (NA/EU). Last fallback.

Generated on 2026-04-03T20:37:39Z