Acorn System 1

The System 1 was the first commercially available computer produced by CPU Ltd under the trading name of Acorn Computers Ltd. It was designed by Sophie Wilson and marketed as the Acorn Microcomputer in 1979.

The System 1 consists of 2 Eurocards each measuring 100 x 160mm. The first is the 1MHz 6502 CPU card  and the second is the System 1 keyboard card. They are connected together by a ribbon cable.

The CPU card has a 1Mhz crystal and a Rockwell R6502P CPU. It has 2 x NatSemi INS8154 RAM I/O chips, with receivers and drivers for the keypad ribbon cable and the other for the EuroConnector (this allows the CPU card to be used in a System 2, 3 or 4). There are 2 x 2114 providing 1KB of RAM and 2 x 74S571 ROM chips giving 512 Bytes of ROM. There is an empty socket for an 2516 UVPROM and the power connector with a 5V regulator.

The keyboard card has a 9 digit 7 segment LED display (of which only 8 digits are used), and a 25 key hexadecimal keypad. The rest of the card is the CUTS (Computer Users Tape Standard) 300 baud cassette interface.

The Acorn Microcomputer would later be developed into the System 2, 3, 4 and 5.

We also have the Acorn System 1 Users Manual which was kindly donated by Professor Steve Furber.

Manufacturer: Acorn Computers
Date: March 1979

Acorn System 1 Manuals:

Item Manufacturer Date
Acorn System 1 - Users Manual Acorn Computers Ltd 1979

Magazines RELATED to Acorn System 1 in our Library

Item Manufacturer Date
Practical Computing - September 1979 September 1979

Other Systems Related To Acorn System 1:

Item Manufacturer Date
Acorn BBC Micro Model A (Issue 2 Board) Acorn Computers Ltd Unknown
Acorn AEH02 Archimedes NSM Acorn Computers Ltd Unknown
Busicomputers Prophet 3 Acorn Computers Ltd Unknown
Acorn System 4 Acorn Computers Ltd Unknown
Acorn System 5 Acorn Computers Ltd Unknown
Acorn Electron (Trial ROM) Acorn Computers Ltd Unknown
Acorn System 1 Acorn Computers Ltd Unknown
Acorn 6502 Microcomputer Board Acorn Computers Ltd 1979
Acorn BBC Domesday System Acorn Computers Limited 1986
Acorn Econet Terminal Acorn Computers Ltd 1986
Acorn - BT Merlin M2105 Acorn Computers / British Telecom 13th May 1986
Acorn Archimedes 440 Acorn Computers July 1987
Acorn Archimedes A440/1 Acorn Computers May 1989
Acorn R260 Acorn Computers 1990
Acorn Stork Notebook Acorn Computers Ltd 1996
Acorn Fast NC - Serial Number 1 Acorn Computers Ltd 1997

This exhibit has a reference ID of CH11288. Please quote this reference ID in any communication with the Centre for Computing History.

 

Acorn System 1


Click on the Image(s) For Detail


User Submitted Articles


Add Your Article >>>

Founding Sponsors
redgate Google ARM Real VNC Microsoft Research
Heritage Lottery Funded
Heritage Lottery Fund