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Watford Electronics A310 2MB Upgrade
Watford Electronics A310 2MB Upgrade MEMC1a board
Watford Electronics A310 2MB Upgrade VIDC board
The Archimedes A310 was designed for a maximum of 1MB RAM. Although the MEMC could manage upto 4 MB, the address and control lines are missing for more than 1MB unlike the A400 and A400/1 range. Watford Electronics solution is to replace the MEMC with a daughter board with 2MB (or 4 MB) and plug it into the MEMC socket on the motherboard and to fit a secod daughterboard to the VIDC socket and access the required line via a ribbon cable. One disadvantage of this arrangement is that you could not fit an ARM3 upgrade. There is a plastic insulation sheet fixed to the back of the boards to prevent contact with other parts of the computer and especially the disc drive barcket.