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Mednafen core for Sega Saturn emulation through RetroArch

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  1. Download the two BIOS files you need (they are here in a zip file.)
    1. sega_101.bin (md5 hash is: 85ec9ca47d8f6807718151cbcca8b964)
    2. mpr-17933.bin (md5 hash is: 3240872c70984b6cbfda1586cab68dbe)
  2. Place them in the appropriate folder under RetroArch
    1. Typically this is the RetroArch/system folder
    2. You can place them where ever if you use per-core configs (I use RetroArch/system/mednafen_saturn_bios)
    3. If you just use one config file (i.e. everything is saved to RetroArch.cfg) then place all BIOS files for all emulators in the same folder (again, typically RetroArch/system folder.)
    4. You will have to set the BIOS location in RetroArch
  3. Open RetroArch and enter the Directory location
    1. It is in the second column – “Settings”; the one with the gears for the icon
    2. Near the bottom of that column is the Directory section
  4. The first directory option under the Directory section is System/BIOS Dir
    1. Set the directory to wherever you saved the two BIOS files in step 2.
    2. Save the RetroArch config.
      1. If you are using per-core configs MAKE SURE YOU’VE LOADED THE Mednafen Saturn config file first! Don’t overwrite the default RetroArch config file with a new default BIOS directory location – unless you’re going to put ALL emulator BIOSes in that directory (see 2.C. above.)