Libretro Mednafen_Saturn is a port of the Mednafen Saturn emulator (standalone) to Libretro supporting 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 | ✔ |
| Rewind | ✔ |
| Netplay | ✔ |
| Core Options | ✔ |
| RetroAchievements | ✔ |
| Controls | ✔ |
| Remapping | ✔ |
| Multi-Mouse | ✔ |
¶ 
BIOS
¶ List of mandatory bios
| Filename | Description | MD5 | Provided |
|---|---|---|---|
| sega_101.bin | Saturn JP BIOS - Required for Japanese games | 85ec9ca47d8f6807718151cbcca8b964 | ❌ |
| mpr-17933.bin | Saturn US/EU BIOS - Required for Europena/America games | 3240872c70984b6cbfda1586cab68dbe | ❌ |
| 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 | ❌ |
¶ Location
Put the bios like this:
┣ 📁 recalbox
┃ ┣ 📁 share
┃ ┃ ┣ 📁 bios
┃ ┃ ┃ ┣ 📁 saturn
┃ ┃ ┃ ┃ ┣ 🗒 sega_101.bin
┃ ┃ ┃ ┃ ┣ 🗒 mpr-17933.bin
┃ ┃ ┃ ┃ ┣ 🗒 mpr-18811-mx.ic1
┃ ┃ ┃ ┃ ┣ 🗒 mpr-19367-mx.ic1
¶ 
Isos
¶ Supported extensions
Isos must have the extension:
- .cue/.bin
- .m3u
- .img/.ccd
- .iso
- .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 |
|---|---|---|---|
| Horizontal Overscan Mask | 0 ✅ / 2 / 4 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 26 / 28 / 30 / 32 / 34 / 36 / 38 / 40 / 42 / 44 / 46 / 48 / 50 / 52 / 54 / 56 / 58 / 60 |
beetle_saturn_horizontal_overscan |
0 / 2 / 4 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 26 / 28 / 30 / 32 / 34 / 36 / 38 / 40 / 42 / 44 / 46 / 48 / 50 / 52 / 54 / 56 / 58 / 60 |
| Initial scanline | 0 ✅ / 1 / 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9 / 10 / 11 / 12 / 13 / 14 / 15 / 16 / 17 / 18 / 19 / 20 / 21 / 22 / 23 / 24 / 25 / 26 / 27 / 28 / 29 / 30 / 31 / 32 / 33 / 34 / 35 / 36 / 37 / 38 / 39 / 40 |
beetle_saturn_initial_scanline |
0 / 1 / 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9 / 10 / 11 / 12 / 13 / 14 / 15 / 16 / 17 / 18 / 19 / 20 / 21 / 22 / 23 / 24 / 25 / 26 / 27 / 28 / 29 / 30 / 31 / 32 / 33 / 34 / 35 / 36 / 37 / 38 / 39 / 40 |
| Last scanline | 210 / 211 / 212 / 213 / 214 / 215 / 216 / 217 / 218 / 219 / 220 / 221 / 222 / 223 / 224 / 225 / 226 / 227 / 228 / 229 / 230 / 231 / 232 / 233 / 234 / 235 / 236 / 237 / 238 / 239 ✅ |
beetle_saturn_last_scanline |
210 / 211 / 212 / 213 / 214 / 215 / 216 / 217 / 218 / 219 / 220 / 221 / 222 / 223 / 224 / 225 / 226 / 227 / 228 / 229 / 230 / 231 / 232 / 233 / 234 / 235 / 236 / 237 / 238 / 239 |
| Initial scanline (PAL) | 0 ✅ / 1 / 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9 / 10 / 11 / 12 / 13 / 14 / 15 / 16 / 17 / 18 / 19 / 20 / 21 / 22 / 23 / 24 / 25 / 26 / 27 / 28 / 29 / 30 / 31 / 32 / 33 / 34 / 35 / 36 / 37 / 38 / 39 / 40 / 41 / 42 / 43 / 44 / 45 / 46 / 47 / 48 / 49 / 50 / 51 / 52 / 53 / 54 / 55 / 56 / 57 / 58 / 59 / 60 |
beetle_saturn_initial_scanline_pal |
0 / 1 / 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9 / 10 / 11 / 12 / 13 / 14 / 15 / 16 / 17 / 18 / 19 / 20 / 21 / 22 / 23 / 24 / 25 / 26 / 27 / 28 / 29 / 30 / 31 / 32 / 33 / 34 / 35 / 36 / 37 / 38 / 39 / 40 / 41 / 42 / 43 / 44 / 45 / 46 / 47 / 48 / 49 / 50 / 51 / 52 / 53 / 54 / 55 / 56 / 57 / 58 / 59 / 60 |
| Last scanline (PAL) | 230 / 231 / 232 / 233 / 234 / 235 / 236 / 237 / 238 / 239 / 240 / 241 / 242 / 243 / 244 / 245 / 246 / 247 / 248 / 249 / 250 / 251 / 252 / 253 / 254 / 255 / 256 / 257 / 258 / 259 / 260 / 261 / 262 / 263 / 264 / 265 / 266 / 267 / 268 / 269 / 270 / 271 ✅ / 272 / 273 / 274 / 275 / 276 / 277 / 278 / 279 / 280 / 281 / 282 / 283 / 284 / 285 / 286 / 287 |
beetle_saturn_last_scanline_pal |
230 / 231 / 232 / 233 / 234 / 235 / 236 / 237 / 238 / 239 / 240 / 241 / 242 / 243 / 244 / 245 / 246 / 247 / 248 / 249 / 250 / 251 / 252 / 253 / 254 / 255 / 256 / 257 / 258 / 259 / 260 / 261 / 262 / 263 / 264 / 265 / 266 / 267 / 268 / 269 / 270 / 271 / 272 / 273 / 274 / 275 / 276 / 277 / 278 / 279 / 280 / 281 / 282 / 283 / 284 / 285 / 286 / 287 |
| Enable Horizontal Blend(blur) | Disabled ✅ / Enabled |
beetle_saturn_horizontal_blend |
disabled / enabled |
| 6Player Adaptor on Port 1 | Disabled ✅ / Enabled |
beetle_saturn_multitap_port1 |
disabled / enabled |
| 6Player Adaptor on Port 2 | Disabled ✅ / Enabled |
beetle_saturn_multitap_port2 |
disabled / enabled |
| Allow Up+Down and Left+Right | Disabled ✅ / Enabled |
beetle_saturn_opposite_directions |
disabled / enabled |
| Analog Stick Deadzone | 0 / 5% / 10% / 15% ✅ / 20% / 25% / 30% |
beetle_saturn_analog_stick_deadzone |
0 / 5% / 10% / 15% / 20% / 25% / 30% |
| Trigger Deadzone | 0 / 5% / 10% / 15% ✅ / 20% / 25% / 30% |
beetle_saturn_trigger_deadzone |
0 / 5% / 10% / 15% / 20% / 25% / 30% |
| Mouse Sensitivity | 5% / 10% / 15% / 20% / 25% / 30% / 35% / 40% / 45% / 50% / 55% / 60% / 65% / 70% / 75% / 80% / 85% / 90% / 95% / 100% ✅ / 105% / 110% / 115% / 120% / 125% / 130% / 135% / 140% / 145% / 150% / 155% / 160% / 165% / 170% / 175% / 180% / 185% / 190% / 195% / 200% |
beetle_saturn_mouse_sensitivity |
5% / 10% / 15% / 20% / 25% / 30% / 35% / 40% / 45% / 50% / 55% / 60% / 65% / 70% / 75% / 80% / 85% / 90% / 95% / 100% / 105% / 110% / 115% / 120% / 125% / 130% / 135% / 140% / 145% / 150% / 155% / 160% / 165% / 170% / 175% / 180% / 185% / 190% / 195% / 200% |
| Gun Crosshair | Cross ✅ / Dot / Off |
beetle_saturn_virtuagun_crosshair |
Cross / Dot / Off |
| Gun Input Mode | Lightgun ✅ / Touchscreen |
beetle_saturn_virtuagun_input |
Lightgun / Touchscreen |
| Cartridge | Auto Detect ✅ / None / Backup Memory / Extended RAM (1MB) / Extended RAM (4MB) / The King Of Fighters '95 / Ultraman: Hikari no Kyojin Densetsu |
beetle_saturn_cart |
Auto Detect / None / Backup Memory / Extended RAM (1MB) / Extended RAM (4MB) / The King Of Fighters '95 / Ultraman: Hikari no Kyojin Densetsu |
| Shared Internal Memory (Restart) | Enabled / Disabled ✅ |
beetle_saturn_shared_int |
enabled / disabled |
| Shared Backup Memory (Restart) | Enabled / Disabled ✅ |
beetle_saturn_shared_ext |
enabled / disabled |
| System Region | Auto Detect ✅ / Japan / North America / Europe / South Korea / Asia (NTSC) / Asia (PAL) / Brazil / Latin America |
beetle_saturn_region |
Auto Detect / Japan / North America / Europe / South Korea / Asia (NTSC) / Asia (PAL) / Brazil / Latin America |
| BIOS Language | English ✅ / German / French / Spanish / Italian / Japanese |
beetle_saturn_autortc_lang |
english / german / french / spanish / italian / japanese |
| CD Image Cache (Restart) | Disabled ✅ / Enabled |
beetle_saturn_cdimagecache |
disabled / enabled |
| Mid-frame Input Synchronization | Disabled ✅ / Enabled |
beetle_saturn_midsync |
disabled / enabled |
| Automatically set RTC on game load | Enabled ✅ / Disabled |
beetle_saturn_autortc |
enabled / disabled |
¶ 
External links
- Source code used: https://github.com/libretro/beetle-saturn-libretro/
- Libretro documentation: https://docs.libretro.com/library/beetle_saturn/