This implementation of KERMIT is composed of seven modules:

	main program	is the top level program
	KRMCMD	provides a user command interface modeled after, but
		not nearly as comprehensive as, the TOPS-20 COMND
		facility.
	KRMGUTS	contains the routines and data structures that
		actually implement the KERMIT protocol.
	ERR_CODES  defines the error codes used to identify error and
		status conditions
	KRMRPT	provides a uniform error reporting and status display
		facility
	KRMIO	supports the special eight-bit file and serial port
		I/O facilities needed by KRMGUTS
	WINDOWLIB	provides a rudimentary text window facility,
		wherein the screen is partitioned into a number
		of rectangular regions (windows), in which text may be
		displayed.


The modules reside in six files, as follows:

	File		Modules
	--------	------------
	KRMMAIN		main program
	KRMGUTS		KRMGUTS
	KRMCMD		KRMCMD
	KRMIO		KRMIO
	KRMWNDW		WINDOWLIB
	KRMRPT		ERR_CODES
			KRMRPT


The heirarchical relation among the modules is as follows:

			   KRMMAIN
		KRMCMD			KRMGUTS
					KRMIO
		KRMRPT/ERR_CODES
		KRMWNDW

The modules in the left column comprise the user interface, whereas
the modules in the right column implement the Kermit protocol.  The
modules KRMRPT and ERR_CODES, which provide the error and status
reporting mechanism, are used by all modules above them.  The
functions performed by each of the modules is described below.



KRMGUTS is the module that does all the work - it actually implements
the Kermit protocol.  The other modules just interface it to the
operating system's file and serial port I/O, and provide a way for the
user to type commands to KRMGUTS.