The QXL ran the SMSQ Qdos-compatible operating system and used the host PC's disks, screen, keyboard, serial and parallel ports via an MS-DOS "server".
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This project was later cancelled, however, SuperBASIC was subsequently included in the ROM firmware of the Sinclair QL personal computer (launched in January 1984), also serving as the command interpreter for the QL's Qdos operating system.