.TITLE BACK
;
;	The following programs are used in the RT-11 User and RT-11
;	Programmer self paced instruction courses for RT-11 V4.They are also
;	similar to programs used in the Programming with RT-11 series for
;	RT-11 V5.0 or later. The name of the files are as specified in the
;	self paced course.
;
;	The code is supplied as a service as Digital does not supply these
;	on diskette.
;	Any copyright is the property of Digital Equipment Corporartion
;
;
;PROGRAM WILL PRINT "HELLO FROM THE BACKGROUND"
; EVERY TWO SECONDS
;
	.MCALL	.PRINT,.TWAIT,.EXIT
LOOP:	.PRINT	#HELLO		;PRINT MESSAGE
	.TWAIT	#AREA,#TIME	;WAIT
	BCC	LOOP		;DO AGAIN IF .TWAIT SUCCESSFUL
	.PRINT 	#QERR		;ELSE PRINT ERROR MESSAGE
	.EXIT
HELLO:	.ASCIZ	/HELLO FROM THE BACKGROUND/
QERR:	.ASCIZ	/?NO QUEUE ELEMENT AVAILABLE?/
	.EVEN
AREA:	.BLKW	2		;EMT AREA
TIME;	.WORD	0,60.*2		;TWO SECONDS WORTH OF TICKS
	.END	LOOP