Libretro Kronos is a port of Yabause emulator for Libretro emulating the Sega Saturn.
¶ 
License
This core is under GPLv2 license.
¶ 
Compatibility
| RPI0/RPI1 | RPI3 | RPI4/RPI400 | RPI5 | ODROID XU4 | OGA/OGS/RG351 | PC | RG353 |
|---|---|---|---|---|---|---|---|
| ❌ | ❌ | ❌ | ❌ | ✅ | ❌ | ✅ | ❌ |
¶ 
Features
| Feature | Supported |
|---|---|
| Restart | ✔ |
| Screenshots | ✔ |
| Saves | ✔ |
| States | ✔ |
| Core Options | ✔ |
| RetroAchievements | ✔ |
| RetroArch Cheats | ✔ |
| Controls | ✔ |
| Remapping | ✔ |
| Disk Control | ✔ |
¶ 
BIOS
¶ List of mandatory bios
| Filename | Description | MD5 | Provided |
|---|---|---|---|
| mpr-18811-mx.ic1 | The King of Fighters '95 - Required for this game | 255113ba943c92a54facd25a10fd780c | ❌ |
| mpr-19367-mx.ic1 | Ultraman: Hikari no Kyojin Densetsu - Required for this game | 1cd19988d1d72a3e7caa0b73234c96b4 | ❌ |
| saturn_bios.bin | Saturn BIOS | af5828fdff51384f99b3c4926be27762 | ❌ |
| stvbios.zip | ST-V BIOS | 2b99d9dcecde22db4371580b6bb33f32 53a094ad3a188f86de4e64624fe9b3ca 17116d2aea72454096b3f80ab714bfba 2b99d9dcecde22db4371580b6bb33f32 4cb34733b741ada074f11e3abcdc56d8 6b6d422a6c392eaec178b64b92987e99 88b9da6cda268ba1d9e37dd82d038801 8c34608cc140e1bfbf9c945a12fed0e8 b876d86e244d00b336980b4e26e94132 | ❌ |
¶ Location
Put the bios like this:
┣ 📁 recalbox
┃ ┣ 📁 share
┃ ┃ ┣ 📁 bios
┃ ┃ ┃ ┣ 📁 saturn
┃ ┃ ┃ ┃ ┣ 🗒 mpr-18811-mx.ic1
┃ ┃ ┃ ┃ ┣ 🗒 mpr-19367-mx.ic1
┃ ┃ ┃ ┃ ┣ 🗒 saturn_bios.bin
┃ ┃ ┃ ┃ ┣ 🗒 stvbios.zip
¶ 
Isos
¶ Supported extensions
Isos must have the extension:
- .bin/.cue
- .m3u
- .img/.ccd
- .chd
¶ Location
Put the isos like this:
┣ 📁 recalbox
┃ ┣ 📁 share
┃ ┃ ┣ 📁 roms
┃ ┃ ┃ ┣ 📁 saturn
┃ ┃ ┃ ┃ ┣ 🗒 game.bin
┃ ┃ ┃ ┃ ┣ 🗒 game.cue
The isos using Redump format are highly recommended.
For more information about isos, go to this tutorial!
¶ 
Advanced configuration of the emulator
To be able to keep your custom configurations during an upgrade, we advise you to use our configuration override feature.
¶ Accessing to options
You can configure various options in two different ways.
- Via RetroArch menu:
┣ 📁 RetroArch Menu
┃ ┣ 📁 Core options
┃ ┃ ┣ 🧩 Name_option
- Via the file
retroarch-core-options.cfg:
┣ 📁 recalbox
┃ ┣ 📁 share
┃ ┃ ┣ 📁 system
┃ ┃ ┃ ┣ 📁 configs
┃ ┃ ┃ ┃ ┣ 📁 retroarch
┃ ┃ ┃ ┃ ┃ ┣ 📁 cores
┃ ┃ ┃ ┃ ┃ ┃ ┣ 🧩 retroarch-core-options.cfg
¶ Core options
| Options | Options values | Variables (for configuration override) | Variables values |
|---|---|---|---|
| Force HLE BIOS (restart) | Disabled ✅ / Enabled |
kronos_force_hle_bios |
disabled / enabled |
| Video format | auto ✅ / NTSC / PAL |
kronos_videoformattype |
auto / NTSC / PAL |
| Frameskip | No skipping ✅ / Skip rendering of 1 frames out of 2 / Skip rendering of 2 frames out of 3 / Skip rendering of 3 frames out of 4 / Skip rendering of 4 frames out of 5 / Skip rendering of 5 frames out of 6 |
kronos_skipframe |
0 / 1 / 2 / 3 / 4 / 5 |
| SH-2 cache support (experimental) | Disabled ✅ / Enabled |
kronos_usercache |
disabled / enabled |
| Share saves with beetle | Disabled ✅ / Enabled |
kronos_use_beetle_saves |
disabled / enabled |
| Addon Cartridge (restart) | None / 1M_extended_ram / 4M_extended_ram / 16M_extended_ram / 512K_backup_ram ✅ / 1M_backup_ram / 2M_backup_ram / 4M_backup_ram |
kronos_addon_cartridge |
None / 1M_extended_ram / 4M_extended_ram / 16M_extended_ram / 512K_backup_ram / 1M_backup_ram / 2M_backup_ram / 4M_backup_ram |
| 6Player Adaptor on Port 1 | Disabled ✅ / Enabled |
kronos_multitap_port1 |
disabled / enabled |
| 6Player Adaptor on Port 2 | Disabled ✅ / Enabled |
kronos_multitap_port2 |
disabled / enabled |
| Resolution | original ✅ / 480p / 720p / 1080p / 4k / 8k |
kronos_resolution_mode |
original / 480p / 720p / 1080p / 4k / 8k |
| Output to original resolution | Disabled ✅ / Enabled |
kronos_force_downsampling |
disabled / enabled |
| Improved mesh | Disabled ✅ / Enabled |
kronos_meshmode |
disabled / enabled |
| Improved banding | Disabled ✅ / Enabled |
kronos_bandingmode |
disabled / enabled |
| Wireframe mode | Disabled ✅ / Enabled |
kronos_wireframe_mode |
disabled / enabled |
| ST-V Service/Test Buttons | Disabled ✅ / Enabled |
kronos_service_enabled |
disabled / enabled |
| ST-V Favorite Region | EU ✅ / US / JP / TW |
kronos_stv_favorite_region |
EU / US / JP / TW |
| Bios Language | English ✅ / German / French / Spanish / Italian / Japanese |
kronos_language_id |
English / German / French / Spanish / Italian / Japanese |
¶ 
External links
- Source code used: https://github.com/FCare/Kronos/
- Libretro documentation: https://docs.libretro.com/library/kronos/