Converts an absolute or delta time from 64-bit system time format
    to an ASCII string.

    On Alpha and Integrity server systems, this service accepts 64-
    bit addresses.

    Format

      SYS$ASCTIM  [timlen] ,timbuf ,[timadr] ,[cvtflg]

    C Prototype

      int sys$asctim  (unsigned short int *timlen, void *timbuf,

                      struct _generic_64 *timadr, char cvtflg);