IFEL 4MB RAM expansion

The Acorn A3010 shipped with 1MB of RAM fitted and although the architecture of the Acorn hardware supported a maximum of 4MB of RAM per MEMC chip, the A3010 only officially supported a 1MB or 2MB configurations despite the jumpers being able to configure the RAM size to 1MB, 2MB or 4MB of RAM.

It was left to third party hardware developers to create 4MB RAM expansions and the IFEL board pictured is one such expansion. 

The IFEL 4MB RAM expansion plugs into the two 1MB RAM expansion sockets which were designed to accept two 512Kb ZIP RAM chips used to upgrade the machine to 2MB by adding a total of 1MB of RAM to the existing 1MB of RAM fitted to the mothe