	THIS UIC CONTAINS A SERIES OF FORTRAN CALLABLE SUBROUTINES
	DESIGNED TO ALLOW THE USER TO UTILIZE THE INTERNAL CHARACTER-
	ISTICS OF THE VT-100 FAMILY OF TERMINALS.  SINCE THE ORIGINAL
	PURPOSE OF THIS LIBRARY WAS TO SUPPORT A VT-105 TERMINAL, 
	SOME OF THE ROUTINES ARE SPECIFIC FOR THAT TYPE TERMINAL.
	THESE ROUTINES WERE WRITTEN FOR RSX-11M (VERS 3.2), AND THE 
	FULL DUPLEX TERMINAL DRIVER.  EXTREME CARE SHOULD BE TAKEN TO
	INSURE THAT THE LOGICAL UNIT TO WHICH THESE ROUTINES ARE 
	TO ACT UPON, IS IN FACT A TERMINAL.  UNPREDICTABLE  RESULTS
	WILL OCCUR IF THE OUTPUT IS REDIRECTED TO A DEVICE OTHER
	THAN A TERMINAL.  FOR AN EXPLAINATION OF THIS SEE THE 
	FULL DUPLEX TERMINAL DRIVER SECTION 2.17.3.
	
	WRITTEN BY	KEN ROLLER
			RESEARCH COMPUTER SERVICES
			G.D. SEARLE
			P.O. BOX 5110
			CHICAGO, ILL. 60680
	
	
	THE FOLLOWING IS A SUMMARY OR THE ROUTINES:
	
	BUFFER	- SET THE BUFFER SIZE ( 80. OR 132.)
	TIMOUT	- ISSUE A MARK TIME DIRECTIVE ( USED WITHIN THE VTWHO MODULE)
	VTANS	- SET THE TERMINAL TO THE ANSI STD MODE
		  ( NOTE: ALL ROUTINES EXPECT THE TERMINAL TO BE IN THIS MODE)
	VTATT	- ATTACH THE TERMINAL LUN TO THE TASK
	VTBRT	- SET THE BACKGROUND TO BRIGHT
	VTCLR	- CLEAR THE SCREEN OF ALL GRAPHICS AND TEXT (VT-105 SPECIFIC)
	VTCMV	- MOVE THE CURSOR TO THE REQUESTED POSITION
	VTDRK	- SET THE BACKGROUND TO DARK
	VTDTX	- DISPLAY TEST AT REQUESTED POSITION, AND WITH REQUESTED
		  ATRIBUTES
	VTELN	- ERASE ALL OR PART OF A SPECIFIED LINE
	VTESC	- ERASE ALL OR PART OF THE SCREEN
	VTGOF	- RETURN TERMINAL TO TEXT MODE (VT-105 SPECIFIC)
	VTGON	- PUT THE TERMINAL INTO THE GRAPHICS MODE (VT-105 SPECIFIC,
		  AND VT-125 TO VT-105 EMULATION MODE)
	VTHGT	- ERASE A PAIR OF LINES AND SET THEM TO EITHER SINGLE OR
		  DOUBLE HEIGHT
	VTHME	- RETURN THE CURSOR TO THE "HOME" POSITION (UPPER LEFT)
	VTJMP	- SET THE TERMINAL TO THE "JUMP" SCROLL MODE
	VTLED	- CONTROL THE LED DISPLAY ON THE KEYBOARD
	VTRCR	- RESTORE THE CURSOR AND GRAPHIC RENDITION (VT-105 SPECIFIC)
	VTROL	- SET THE SCROLL AREA ON THE TERMINAL
	VTSCR	- SAVE THE CURSOR AND GRAPHIC RENDITION (VT-105 SPECIFIC)
	VTSGC	- ENABLE OR DISABLE THE SPECIAL GRAPHICS CHARACTER SET
	VTSRL	- SET THE TERMINAL TO THE "SMOOTH" SCROLL MODE
	VTWDT	- SET A LINE TO EITHER SINGLE OR DOUBLE WIDTH
	VTWHO	- QUERIES THE TERMINAL AS TO ITS TYPE AND OPTIONS AND
		  RETURNS THE INFO TO CALLING ROUTINE
	VT52M	- SET THE TERMINAL TO THE VT-52 MODE
	VT080	- SET THE TERMINAL TO 80 COLUMN MODE
	VT132	- SET THE TERMINAL TO 132 COLUMN MODE (ASSUMES A.V.O.)
	
	VTLIB.CMD IS A COMMAND FILE TO COMPILE AND BUILD THE VT LIBRARY.
	ADDITIONALLY, THERE ARE SEVERAL EXAMPLES OF THE USE OF THESE 
	ROUTINES.
	
	PROGRAM TREE WILL PRODUCE A CHRISTMAS TREE AND BLINK THE LIGHTS
	TO ONE OF THREE STATES.  THIS PROGRAM IS BEST RUN FROM A HIGH 
	BAUD RATE TERMINAL. (@ 4800 RUN TIME ~APROX 2 MIN)
	
	PROGRAM LED WILL TURN THE LED DISPLAY ON AND OFF WITH SEVERAL
	PATTERNS
	
	PROGRAM CUTE IS CUTE!
	
	
			END OF DOCUMENT
