RetroArch and libretro provide a way to take an existing emulator and load that emulator as a library or 'core'. RetroArch is the official front end for the libretro API.
Universal Controller Calibration & Mapping Using xboxdrvĮxample Per-System Control Override retroarch.cfgĬonvert RetroPie SD Card Image to NOOBS Image Validating, Rebuilding, and Filtering Arcade ROMs
