D is a ZCPR3 directory program, under 4K, that provides several 
unique features, including a lower-case display and the number of 
remaining directory entries, and a large number of options.  
Version 1.6 now sets error flag if no matching files are found.  
New M option stores number of matching files in user registers.  
New Q option suppresses display.  (I know, I know, a directory 
program with a quiet option ?!?)