Acorn Archimedes A3000

The Acorn Archimedes was the first RISC based home computer. They came with a graphical user interface operating system called “RISC OS”. They could display 256 colours on screen and 8 channel stereo sound. They were very popular in the late 1980s and early 1990s in schools, they superseeded the BBC Micro.

Processor Type: ARM2

Processor Speed: 8MHz (Main)

RAM: 1Mb (Expandable to 4Mb)

ROM: 512k (RISC OS 2) or 1Mb (RISC OS 3)

Display: None – Monochrome connection to a TV via RCA phono connector or colour monitor via 9pin D-Sub connector

Sound: VIDC

Storage: 720k 3.5″ floppy drive (could be upgraded to 1.44Mb floppy), a hard drive could be fitted using a “podule”.

Network: Econet


Original Release Date: May 1989

Discontinued: Mid 1990s

Cost (New in 1989): £649.99

Cost (In 2019 Price): £1588.60


Modifications I have performed:

Removed and replaced CMOS battery

General clean

Replaced power supply

RGB to Scart cable for colour TV output

Changed ROM chips to upgrade RISC OS from 2.00 to 3.11

Acorn mouse to USB adapter

Fitted ZIDEFS Compact Flash “Hard Drive”

Replaced CMOS chip

Replaced all three internal timing crystals


Cost to me for computer £0.00

Cost to me for repairs and upgrades £292.09


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