Miracle Systems

Miracle Systems Ltd. were a manufacturer of personal computer peripherals and upgrades, specializing in the Sinclair QL, in the 1980s and early 1990s.The company was incorporated in February 1983.

Initially, they produced simple peripherals such as an RS-232 to Centronics parallel printer interface adapter.

[4][5][6] This replaced the QL's 68008 CPU with a 16 MHz 68000 and included 2 MB of RAM, a floppy disk interface (supporting DD, HD, and ED density 3.5 in drives) and a non-volatile real-time clock.

The follow-up Super Gold Card had a 24 MHz 68020 CPU, 4MB of RAM, and added a Centronics parallel printer interface.

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".

Expanderam and CST floppy disk interface for Sinclair QL