Mixed Utility Software Bundle for Atari ST comprising of: Studio Convert & Studio Photo Disks, Spell-IT! Disk and Manual, 1st Word Plus Disks and Manual, Hyperpaint Disk and Manual, NEOchrome Sampler Disk and Manual, Atari ST Basic Disk and Manual. This BIOS is optional if you want the Atari Logo at the beginning of games, otherwise you don't need it because the games work fine without it. The BIOS file name is 7800 BIOS (U).rom. Place your Atari 7800 BIOS in. /home/pi/RetroPie/BIOS/. Note: if this BIOS is enabled, PAL ROMs will not work so use it accordingly.