Acorn A4 Laptop
June 1992 Acorn launched their only portable computer. Reportedly based on the A5000 (or may be vice versa) the A4 has the footprint of a sheet of A4 paper (hence the name) and weighs about 3 kg. The A4 came with a rather fetching carry case with space for the external power supply, manuals and a mouse. The A4 has an ARM3 CPU clocked at 24MHz, 4MB RAM and a 640x480 16 greyscale screen.
The operating system (RISC OS 3.10) was located in the 2 MB ROM. The 9'' LCD screen could only display 14 shades of grey, but used a clever dithering system to make more shades apparent.
K/Board 84 keys with arrow keys
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This exhibit has a reference ID of CH22807. Please quote this reference ID in any communication with the Centre for Computing History.