OS V1.0-low (1981)(Acorn) ROM for Acorn 8 bit (). OS V1.0-low (1981)(Acorn) game is available to play online and only onRoms Games. OS V1.0-low (1981)(Acorn) ROM for Acorn 8 bit requires an emulator to play the game offline. This Game is English (USA) Version and is the highest quality available.