The CMD SuperRAM card is an add-in card for the CMD SuperCPU 64 and SuperCPU 128 accelerator cartridges. This card will allow the addition of 1,4,8 or 16 Megabytes of RAM which the 65816 processor of the SuperCPU can directly address. A single SIMM (Single Inline Memory Module) socket on the SuperRAM circuit board provides this expandability using standard 72-pin fast-page mode SIMM modules.