Acorn System 1

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Acorn Microcomputer
Upper board, featuring keypad and LED display.
Developer Acorn Computers
Type 8-bit semi-professional
Release date March 1979; 36 years ago (1979-03)[1]
Introductory price £65 (kit), £75 (assembled)[2]
CPU 6502
Display LED
Successor Acorn System 2, Acorn Atom

The Acorn System 1, initially called the Acorn Microcomputer (Micro-Computer), was an early 8-bit microcomputer for hobbyists, based on the MOS 6502 CPU, and produced by British company Acorn Computers from 1979.

The system was designed by then-Cambridge-undergraduate student Sophie Wilson.[3] It was Acorn's first product, and was based on an automated cow feeder.[3][disputed ]

It was a small machine built on two Eurocard-standard circuit boards:

  • one card (shown right) with the I/O part of the computer: a LED seven segment display, a 25-key keypad (hex+function keys), and a cassette interface (the circuitry to the left of the keypad)
  • the second card (the computer board), which included the CPU, RAM/ROM memory, and support chips.

Almost all CPU signals were accessible via the standard Eurocard connector.

See also[edit]


  1. ^ Meyer, David (November 19, 2010). "Dead IT giants: A top 10 of the fallen". ZDNet. Retrieved March 7, 2012. 
  2. ^ "ACORN COMPUTERS. PRICE LIST MARCH 1979". Acorn Computers. March 1979. Retrieved March 7, 2012. 
  3. ^ a b Goodwins, Rupert (April 25, 2011). "Acorns land at Bletchley Park: PHOTO Acorn System 1". ZDNet. Retrieved November 23, 2011. Acorn's first product was the Acorn System 1, based on an automated cow feeder designed by Sophie (nee Roger) Wilson as part of her degree course at Cambridge in 1977. 

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