 It is a batch file that is run by the COMMAND.COM, when the COMMAND.COM is loaded for the first time.SpartaDOS X requires an Atari 8-bit (400, 800 or XL/XE models) computer equipped with at least 48 KB of conventional memory to run, or 64 KB to be truly usable (on a 48K machine there is too little memory left as to execute most programs).The recommended configuration, though, is at least 128 KB of RAM (64k conventional plus at least 64k extended).