Not every core requires a BIOS. For instance, the Sega Genesis (Genesis Plus GX) or Nintendo Entertainment System (FCEUmm) cores run fine without them. However, advanced systems require proprietary BIOS to function correctly. Here is why you need them:
Much like the Sega CD, playing CD-based TurboGrafx games requires the system card BIOS.
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To achieve a "set it and forget it" setup, you need a specific collection. Here is the master list compatible with the latest stable RetroArch build for PS Vita (v1.9.0 and above).
While 8-bit and 16-bit systems (NES, SNES) typically don't require BIOS, the following systems often do: PS Vita Retroarch 2025 Guide!
