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CJEMicros A3000 2/4MB Upgrade

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 CJE Micros A3000 2/4MB Upgrade (top)

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  CJE Micros A3000 2/4MB Upgrade (bottom)

This RAM upgrade for the A3000 has 8 x M514400-80Z 1M x 4bit DRAM = 4 MB. I think the that the jumper on the left hand side sellects between 2 & 4 MB.