INSTRUCTIONS FOR USING THE COMPOSE PROGRAM


	  I.	Program Description - The COMPOSE program permits you
		to design (compose) characters for the VT200 family of
		terminals. The output of COMPOSE consists of two files;
		a FORTRAN direct access file that contains the character
		definitions in binary form and a text file that can be
		"TYPED" at a VT200 terminal to actually create the
		custom character set. An example set of files is included
		that will generate the APL character set when "TYPED"
		at a VT200 terminal. Be sure that the terminal is in
		VT200 mode and that the terminal type is set to VT200 by
		using the RSX SET TERMINAL command. Note that the FORTRAN
		direct access file is APL.CHR and the test file that
		generates the character set is APL.TXT.

	 II.	Invoke the compose program by typing: RUN COMPOSE

	III.	Enter a file name after the filename prompt. If the
		file does not exist, a new file with the name entered
		will be created. If the file already exists, the old
		file will be opened thus making it possible to modify
		existing custom character sets. This is the FORTRAN
		direct access file that will be used to store the
		custom character set. By convention, I use the .CHR
		file extension for these files.

	 IV.	A menu containing four options will be displayed next.
		The first option permits you to create individual
		characters. The character to be composed is selected by
		entering in the COLUMN, ROW grid coordinates as pictured
		in the 7-Bit ASCII Code Table on page 2-3 of the VT220
		Programmer Reference Manual.

		After the character grid coordinates have been entered,
		either a blank character cell or the previously entered
		character cell is displayed depending whether the file is
		new or old respectively. At this point you create the
		character by moving the cursor around within the character
		grid using the four cursor control keys. To set (turn on) a
		pixel, press the numeric "1" key. To clear (turn off) a pixel,
		press the numeric "0" key. You may set and clear the same
		pixel as needed in order to develop your character.

		After the character has been composed, type the letter "E"
		to exit and return to the main menu. At this point, you
		may compose the next character by reinvoking option 1
		from the menu. You may re-select the same character to
		either verify its existence or make further modifications
		in the design of the character. Bear in mind that a completely
		created character set contains 95 characters.






	   V.	Option 2 is used to create the text file that when typed
		at an appropriately configured VT200 terminal will both
		generate and display the custom character set. The file
		is given the extension .TXT. Bear in mind that entry into
		the custom character set is controlled by Shift Out (SO)
		and Shift In (SI) control characters. You must issue SO
		to enter the custom character set and SI to exit the custom
		character set.

	  VI.	Option 3 permits you to create another custom character
		set. The program will prompt you for another file name
		as explained above. Repeat the steps explained above to
		create another custom character set.

	 VII.	Option 4 permits you to exit the program after your
		custom characters set is completed.