This series was functionally identical to the 400 series but featured a newer memory controller the MEMC1a that gave it a slightly faster speed. It also came with a 53 Megabyte hard drive in the higher end models that came with HD's rather than the 400 series's 20 Meg one.
Our machine is lacking the front cover and part of the rear cover as can be seen from the photographs
We are extremenly grateful to Laurence Van Someren of Aleph One Ltd - http://www.aleph1.co.uk/ for donating this machine togethjer with many other Acorn computers and associated books and manuals
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Other Systems Related To Acorn A440/1:
This exhibit has a reference ID of CH3641. Please quote this reference ID in any communication with the Centre for Computing History.