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Kronos - RetroBIOS
Type libretro
Classification Official ports
Source https://github.com/libretro/yabause
Upstream https://github.com/FCare/Kronos
Version v2.6.0
Profiled 2026-03-24
Cores kronos
Systems sega-saturn, sega-stv
Technical notes

Kronos is a Sega Saturn and ST-V arcade emulator by FCare, forked from Yabause. Requires OpenGL 4.3 compute shaders.

Saturn BIOS search order: 1. {system}/kronos/saturn_bios.bin 2. {system}/saturn_bios.bin 3. {system}/sega_101.bin 4. {system}/mpr-17933.bin First file found wins. Real BIOS required (HLE deprecated, only available via kronos_force_hle_bios core option for debugging).

ST-V BIOS: {system}/kronos/stvbios.zip or {system}/stvbios.zip MAME-style ZIP containing region-specific EPROMs. Kronos picks the best match by game region and kronos_stv_favorite_region core option (EU/US/JP/TW).

ROM cartridges for KOF95 and Ultraman are auto-detected via game database (db.c) and loaded from system_dir when the corresponding game is running.

BIOS loading: libretro.c retro_load_game() lines 1601-1727. STV blob table: ctrl/src/stv.c BiosList lines 112-136. ROM cartridge DB: utils/src/db.c lines 43-45.

Standalone supports MPEG card ROM loading (Video CD card); disabled in libretro port (mpegpath = NULL in libretro.c:1578).

20 files | 2 required, 18 optional | 20 in repo, 0 missing

saturn_bios.bin required in repo

sega_101.bin optional in repo japan

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

stvbios.zip required in repo

epr-23603.ic8 optional in repo japan in stvbios.zip

  • System: sega-stv
  • Size: 512.0 KB
  • CRC32: f688ae60
  • Validation: crc32
  • Source: stv.c:120

epr-20091.ic8 optional in repo japan in stvbios.zip

  • System: sega-stv
  • Size: 512.0 KB
  • CRC32: 59ed40f4
  • Validation: crc32
  • Source: stv.c:121

epr-19730.ic8 optional in repo japan in stvbios.zip

  • System: sega-stv
  • Size: 512.0 KB
  • CRC32: d0e0889d
  • Validation: crc32
  • Source: stv.c:122

epr-17951a.ic8 optional in repo japan in stvbios.zip

  • System: sega-stv
  • Size: 512.0 KB
  • CRC32: 2672f9d8
  • Validation: crc32
  • Source: stv.c:123

epr-17740a.ic8 optional in repo japan in stvbios.zip

  • System: sega-stv
  • Size: 512.0 KB
  • CRC32: 3e23c81f
  • Validation: crc32
  • Source: stv.c:124

epr-17740.ic8 optional in repo japan in stvbios.zip

  • System: sega-stv
  • Size: 512.0 KB
  • CRC32: 5c5aa63d
  • Validation: crc32
  • Source: stv.c:125

epr-17954a.ic8 optional in repo europe in stvbios.zip

  • System: sega-stv
  • Size: 512.0 KB
  • CRC32: f7722da3
  • Validation: crc32
  • Source: stv.c:126

epr-17952a.ic8 optional in repo north-america in stvbios.zip

  • System: sega-stv
  • Size: 512.0 KB
  • CRC32: d1be2adf
  • Validation: crc32
  • Source: stv.c:127

epr-17741a.ic8 optional in repo north-america in stvbios.zip

  • System: sega-stv
  • Size: 512.0 KB
  • CRC32: 4166c663
  • Validation: crc32
  • Source: stv.c:128

epr-19854.ic8 optional in repo taiwan in stvbios.zip

  • System: sega-stv
  • Size: 512.0 KB
  • CRC32: e09d1f60
  • Validation: crc32
  • Source: stv.c:129

epr-17953a.ic8 optional in repo taiwan in stvbios.zip

  • System: sega-stv
  • Size: 512.0 KB
  • CRC32: a4c47570
  • Validation: crc32
  • Source: stv.c:130

epr-17742a.ic8 optional in repo taiwan in stvbios.zip

  • System: sega-stv
  • Size: 512.0 KB
  • CRC32: 02daf123
  • Validation: crc32
  • Source: stv.c:131

stv110.bin optional in repo in stvbios.zip

  • System: sega-stv
  • Size: 512.0 KB
  • CRC32: 3dfeda92
  • Validation: crc32
  • Source: stv.c:132

stv1061.bin optional in repo in stvbios.zip

  • System: sega-stv
  • Size: 512.0 KB
  • CRC32: 728dbca3
  • Validation: crc32
  • Source: stv.c:133

mpr-18811-mx.ic1 optional in repo

mpr-19367-mx.ic1 optional in repo

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