You need to save them either manually in the OSD or turn on autosave. One card can be mounted for each controller slot. Games that are in their own folder will create it's own memory card in media/fat/saves/psx as. Clock, BIOS, CD check) are selected automatically when loading a CD. If you get a black screen with 'ED' overlay in upper left corner, either your BIOS files are corrupt or missing or you have no SDRAM module installed. This can be used for games that depend on a special BIOS beyond usual US,EU,JP. You can also place a cd_bios.rom in the same directory as the CD or 1 directory above, to have it uses together with that CD.
