This command lists files that exist on the RAM disk and on the Flash disk. <file> may contain the * and ? wildcard characters to refine the list. The character * signifies any combination of letters, and the ? character signifies any letter. When invoked without a wildcard, all the files are listed.
The RAM disk is for used to store internal files (to which you do not have access), and stores the record data files (*.rec). The Flash disk stores the user programs (*.prg) and CAM files (*.cam). The contents of the Flash disk are preserved at power off, but the contents of the RAM disk are lost.
DIR ‘Returns all files on disk
Dir *.prg ‘Returns all files having extension PRG