¶ 
License
This core is under GPLv3 license.
¶ 
Compatibility
| RPI0/RPI1 | RPI3 | RPI4/RPI400 | RPI5 | ODROID XU4 | OGA/OGS/RG351 | PC | RG353 |
|---|---|---|---|---|---|---|---|
| ❌ | ❌ | ✅ 🐌 | ✅ 🐌 | ✅ 🐌 | ✅ 🐌 | ✅ | ✅ 🐌 |
🐌 Low performances but playable
¶ 
Features
| Feature | Supported |
|---|---|
| Restart | ✔ |
| Saves | ✔ |
| States | ✔ |
| Rewind | ✔ |
| Netplay | ✔ |
| Core Options | ✔ |
| RetroAchievements | ✔ |
| RetroArch Cheats | ✔ |
| Native Cheats | ✔ |
| Controls | ✔ |
| Remapping | ✔ |
| Multi-Mouse | ✔ |
| Softpatching | ✔ |
| Crop Overscan | ✔ |
¶ 
BIOS
No bios is required.
¶ 
Roms
¶ Supported extensions
Roms must have the extension:
- .fig
- .gd3
- .sfc
- .smc
- .swc
- .zip
- .7z
This system supports compressed roms in .zip/.7z format. However, be careful, it is only an archive.
The files contained in the .zip/.7z must correspond to the extensions mentioned above.
Moreover, each .zip/.7z file must contain only one compressed rom.
¶ Location
Put the roms like this:
┣ 📁 recalbox
┃ ┣ 📁 share
┃ ┃ ┣ 📁 roms
┃ ┃ ┃ ┣ 📁 snes
┃ ┃ ┃ ┃ ┣ 🗒 game.zip
The roms using No-Intro format are highly recommended.
For more information about roms, 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 |
|---|---|---|---|
| NTSC Filter | Disabled ✅ / Composite (Blargg) / S-Video (Blargg) / RGB (Blargg) / Monochrome (Blargg) |
mesen-s_ntsc_filter |
Disabled / Composite (Blargg) / S-Video (Blargg) / RGB (Blargg) / Monochrome (Blargg) |
| Region | Auto ✅ / NTSC / PAL |
mesen-s_region |
Auto / NTSC / PAL |
| Game Boy Model | Auto ✅ / Game Boy / Game Boy Color / Super Game Boy |
mesen-s_gbmodel |
Auto / Game Boy / Game Boy Color / Super Game Boy |
| Use SGB2 | Enabled ✅ / Disabled |
mesen-s_sgb2 |
enabled / disabled |
| Vertical Overscan | None ✅ / 8px / 16px |
mesen-s_overscan_vertical |
None / 8px / 16px |
| Horizontal Overscan | None ✅ / 8px / 16px |
mesen-s_overscan_horizontal |
None / 8px / 16px |
| Aspect Ratio | Auto ✅ / No Stretching / NTSC / PAL / 4:3 / 16:9 |
mesen-s_aspect_ratio |
Auto / No Stretching / NTSC / PAL / 4:3 / 16:9 |
| Blend Hi-Res Modes | Disabled ✅ / Enabled |
mesen-s_blend_high_res |
disabled / enabled |
| Cubic Interpolation (Audio) | Disabled ✅ / Enabled |
mesen-s_cubic_interpolation |
disabled / enabled |
| Overclock | None ✅ / Low / Medium / High / Very High |
mesen-s_overclock |
None / Low / Medium / High / Very High |
| Overclock Type | Before NMI ✅ / After NMI |
mesen-s_overclock_type |
Before NMI / After NMI |
| Super FX Clock Speed | 100% ✅ / 200% / 300% / 400% / 500% / 1000% |
mesen-s_superfx_overclock |
100% / 200% / 300% / 400% / 500% / 1000% |
| Default power-on state for RAM | Random Values (Default) ✅ / All 0s / All 1s |
mesen-s_ramstate |
Random Values (Default) / All 0s / All 1s |
| Use HLE coprocessor emulation | Disabled ✅ / Enabled |
mesen-s_hle_coprocessor |
disabled / enabled |
¶ 
External links
- Source code used: https://github.com/libretro/Mesen-S/
- Libretro documentation: https://docs.libretro.com/library/mesen-s/