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  IFEL A310 4MB RAM Upgrade

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 IFEL A310 4MB Upgrade top

 IFEL A310 4MB RAM Upgrade (top)

IFEL A310 4MB Upgrade 

 IFEL A310 4MB RAM Upgrade (bottom)

The IFEL A310 4MB RAM Upgrade (M34ID Issue 1) uses 8 x MB814400A dynamic RAM chips (4 x 1Mb) to provide the memory. It is dated 1992 so is a late upgrade for the A310.
I do not have installation instructions or any other details.