MGT SAM Coupe

The MGT SAM Coupé was a British 8-bit home computer conceived as a sophisticated upgrade path for ZX Spectrum owners. Its 6 MHz Z80B, bank-switched memory, enhanced colour graphics and six-channel stereo sound greatly extended the familiar Z80 architecture.

Designed by Miles Gordon Technology in Swansea, the Coupé could accept one or two slim internal 3.5-inch drives and included MIDI, mouse and light-pen interfaces. Spectrum compatibility helped users bring older software forward, while SAM BASIC and four native display modes supported more ambitious new programs.

Notable Features

• Four display modes ranged from Spectrum-compatible attributes to 512x192 and 16-colour bitmap graphics.
• Philips SAA1099 sound supplied six stereo channels across eight octaves.
• One or two ultra-slim 3.5-inch floppy drives could be fitted inside the case.

Historical Significance

• Developed by the creators of the DISCiPLE and +D Spectrum disk interfaces as a next-generation British Z80 computer.
• Its late arrival and MGT’s financial difficulties limited sales despite capable hardware and an enthusiastic user community.

Collector’s Notes

• The 256KB and 512KB machines are memory configurations of the same model.
• Drive belts, membrane keyboard condition and ROM revision are common restoration points; later production continued under SAM Computers after MGT failed.

Specifications

Technical Information
Name	MGT SAM Coupe
Manufacturer	Miles Gordon Technology
Launched	Friday, December 1, 1989
Discontinued	1992
Country	United Kingdom
CPU	Zilog Z80B at 6 MHz
Units Sold	Approximately 12,000
Operating System	SAM BASIC; SAMDOS; CP/M through software
I/O	SCART, joystick, mouse, light pen/gun, stereo audio, MIDI/network and 64-pin expansion connector
Keyboard	Integrated 72-key full-travel membrane keyboard with ten function keys
Storage	Cassette; one or two internal 3.5-inch drives, 780KB formatted each
Sound	Philips SAA1099, six-channel stereo with envelope and noise generation
Graphics	256x192 in 16 colours or 512x192 in 4 colours; 128-colour palette and Spectrum-compatible modes
Display	UHF television, composite or RGB monitor
ROM	32KB containing SAM BASIC, BIOS and disk bootstrap
RAM	256KB standard; internally expandable to 512KB and externally to approximately 4.5MB
CPU Speed	6 MHz