jelos.org/docs/systems/3do.md

Panasonic 3DO

Overview

Path(s)	Supported Extensions
storage/roms/3do	.iso .bin .chd .cue

Emulators

Name	Documentation
Opera   default	docs.libretro.com/library/opera

Bios

see: https://docs.libretro.com/library/opera/#bios