RM 380Z (Black Case)

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 Z80 microprocessor (hence the name) with up to 56 KiB 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 56 KiB of memory cost £3266, and a 16 KiB cassette-based system cost £965 (excluding VAT).
Research Machines 380Z
Personal computer
Research Machines Limited
Released 1978
Discontinued 1985
Processor Z80 at 4 MHz
Memory 64 KiB maximum (56 KiB usable)
Media 5¼-inch or 8-inch floppy disk
Graphics 320×192 pixels, 2 bits per pixel (optional)
Operating system CP/M
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. Our unit is one those early versions. 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. The only microprocessor offered was a 4 MHz Z80A.

Manufacturer: Research Machines
Date: 1st January 1978

RM 380Z (Black Case) Manuals:

Item Manufacturer Date
High Resolution Graphics Reference Manual Research Machines 01-01-1980
Release Notes for Word Star 3.0 Research Machines 01-03-1982

Magazines RELATED to RM 380Z (Black Case) in our Library

Item Manufacturer Date
Personal Computer World - June 1978 - Volume 1, Number 2 01-06-1978
Personal Computer World - July 1978 -Volume 1, Number 3 01-07-1978
Practical Computing - October 1978 01-10-1978
Personal Computer World - October 1978 01-10-1978
Practical Computing - November 1978 01-11-1978
Practical Computing - December 1978 01-12-1978
Practical Computing - January 1979 01-01-1979
Practical Computing - March 1979 01-03-1979
Practical Computing - April 1979 01-04-1979
Personal Computer World - April 1979 01-04-1979
Practical Computing - May 1979 01-05-1979
Personal Computer World - May 1979 01-05-1979
Practical Computing - June 1979 01-06-1979
Practical Computing - July 1979 01-07-1979
Practical Computing - August 1979 01-08-1979
Practical Computing - October 1979 01-10-1979
Personal Computer World - March 1980 01-03-1980
Personal Computer World - April 1980 01-04-1980
Computer Age - September 1980 Computer Age 01-09-1980
Practical Computing - November 1982 01-11-1982

Other Systems Related To RM 380Z (Black Case):

Item Manufacturer Date
RM Nimbus PC-5200 Accelerator Research Machines Unknown
RM 380Z (Light Blue Case) Research Machines 1st January 1978
RM 380Z (with Colour Card) Research Machines 1st January 1978
RM LINK 480Z Research Machines 1st January 1981
RM Link 480Z in Metal Case Research Machines 1st January 1982
RM Nimbus PC Research Machines 1st January 1985
RM Nimbus AX/2 Research Machines 1st January 1986
RM Nimbus VX/2 Research Machines 1st January 1986
RM Nimbus NB300 Research Machines 1st June 1991
RM Nimbus NB300 Research Machines 1st June 1991
RM Nimbus PC-486/66 Research Machines 1st January 1993

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


RM 380Z (Black Case)

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