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.  It 
also sets error flag if no matching files are found, and 
optionally stores number of matching files in user registers.  
V1.7 corrects a bug or two and adds ZCNFG configuration.