The sources for the demo program are included as demo.asm
and int_serv.asm.  This program can be assembled, linked,
an HP OMF fileset created, and an HP PC Interface fileset
created via demo.bat.

Make sure that the NSC tools are loaded into a directory
which is assessible via PATH and type "demo".

These files should give similar results to the demo code
and symbols loaded into the HP64775 emulator's firmware
and accessed via the terminal interface "demo" command.

There are two behavioral differences between the symbols
loaded by PC Interface and symbols loaded via the terminal
interface "demo" command:

	1. PC Interface module names are "demo.asm" and 
	   "int_serv.asm".  The module names loaded by the
	   Terminal Interface "demo" command are "demo" and
	   "int_serv".

	2. The "demo" terminal interface command loads local
	   line number symbols for assembly source code.  This
	   is for demonstration purposes only.  Line number
	   symbols are only generated for C source code.  This
	   behavior will be removed from the terminal interface
	   firmware as soon as the "demo -c" example is implemented.

Note that version 2.1 of the National Semiconductor's HPOMFHPC
utility does not always create proper path names in the ".L"
file.  The user can temporarily work around this problem by
placing the source files in the same directory as the coff file
before running the HPOMFHPC utility to create the ".L" file,
the ".X" file, and the set of ".A" files.  In normal operation,
the HPOMFHPC utility should generate one ".A" file for each
assembly or C source file.
