IFEL ARM3 processor upgrade for Acorn Archimedes

The IFEL ARM3 processor upgrade replaces the socketed ARM2 CPU in the Archimedes range of computers which ran at 8MHz. A daughterboard mounted into the Archimedes' ARM2 socket sporting an ARM3 CPU running at 25MHz provides a near threefold increase in MIPS throughput. The increase in performance is achieved by use of an on board 4KB cache and the ARM3's ability to run at faster clock speeds.

Both the ARM2 and ARM3 chips actually run at similar rates when compared at the same clock speed processing in the region of 0.5 to 0.6 MIPS for every one 1MHz that the cl