:	Bitmap display utility - description & use

   The CP/M operating system records the current allocation of
storage on a disk drive as a collection of blocks.   Each such
block is either in use in a current file,  or is considered to
be free, ready for use.

   This allocation is recorded in a bit pattern held in memory
for each disk currently logged in.  One bit is set for each of
the allocated blocks, while the bit for each free block is not
set.   This map will not be valid if the disk has been changed
without relogging in that drive.  (this causes the requirement
for a <control C> or disk reset on mounting of a new disk)

   This utility will display this current bitmap for requested
drives, on the console.

   Command Syntax:	BITMAP <DRIVEID>:<return>
