This Atari ST RAM upgrade memory upgrade board will add 4MB of RAM to your Atari ST. It is compact and plugs on top of the MMU making the design ultra slim and compact. You can select 1MB or 4MB (default) via a switch if required. This gives maximum compatibility for ST software which will only run with 1MB RAM. Ideal to upgrade your 520ST,1040ST,520STF,1040STF,MEGA ST, to 4MB of RAM.

NOTE: If your shifter is not in a socket then you will need to unsolder the shifter to plug into the shifter adapter board (not supplied). This upgrade only fits ST/F/M machines with a socketed MMU! It does not fit any other machines and does not fit machines with a SMT or non-socketed MMU! This upgrade is NOT suitable for MSTE,Falcon,STE,TT.

Cables are available separately to fit into MST/STM/STF/M. See items #0014, #0149, #0025. The Shifter board is available separately, either as a kit #0214 or assembled #0235.