(NEXT), the next location after
                                   the largest file read in (MSZE),
                                   the current value of the Program
                                   counter (PC), and the address of
                                   the end of available memory (END)

     Wfilespec,s,f  (Write)        Write the contents of a contiguous
                                   block of memory to filespec.
                                   fetype of SUB).

  ///2Subfile

  The SUB file can contain the following types of lines:

      Any valid CP/M 3 command
      Any valid CP/M 3 command with SUBMIT parameters ($0-$9)
      Any data input line
      Any program input line with parameters ($0 to $9)

  The command line cannot exceed 135 characters.

  The following lines illustrate the variety of lines wh