The Research Machines 380Z, often called the RML 380Z or RM 380Z, was an early 8-bit microcomputer produced by Research Machines Limited in Oxford, England, from 1978 to 1985.

The 380Z used a 4 MHz Z80A microprocessor (hence the name) with up to 56K of user RAM. When fitted with an optional floppy disk drive the system ran the CP/M operating system. The basic system came with a text-only monochrome video card, which could be enhanced with a high-resolution graphics board.

The 380Z was sold mainly to schools in the UK, with some also sold to industry. In 1979 a dual 8-inch disk system with 56K of memory cost £3266, and a 16K cassette-based system cost £965 (excluding VAT).

The 380Z was packaged in a large, black, 19-inch wide, rectangular metal case containing the power supply, a number of printed circuit boards and the optional 5¼-inch floppy disk drives. Early versions were contained in a light blue metal case with a white front and only had a cassette interface; only a small number of these were made. The keyboard was separate and came in a tough metal case.

The system used a passive bus architecture with no motherboard – all electronics were contained on a number of cards interconnected by ribbon cable.

Manufacturer: Research Machines
Date: 1978

This exhibit has a reference ID of CH2226. Please quote this reference ID in any communication with the Centre for Computing History.