A two megabyte memory upgrade for the Commodore Amiga models 500 and 500+ is now available for 39 euros. It is a modern replacement for the original A501 0.5MB (512K) upgrade from Commodore. Add up to 2MB of memory to the machine depending on motherboard revision and Kickstart version (see below for details). Can provide both chip RAM and slow RAM in one expansion. On the Amiga chip RAM is used for graphics and sound. Many games were written to use additional chip RAM to provide better graphics, sounds, music, higher resolution TV images and reduced disk swapping. Slow RAM can be used by workbench and many games also support this memory. The upgrade can be fitted with a realtime clock chip (RTC) and clock backup battery (CR2032).