Xerox 6287 user manual PA1, PA2

GLOSSARY		Page 13-9
NL		New line.
Normal	operating mode	The ALLY PLUS mode in which host
		data may be accepted.
Null		00h. Output by the ALLY PLUS as a
		space.
Null line		A line in the data stream containing
		only null characters.
O
One-trigger		A form of pseudo transparency that
		uses a single trigger character followed
		by a count byte that indicates the length
		of the escape sequence.
Option		An ALLY PLUS configuration
		parameter for which the user can make
		a choice.
Output		Data transferred from a computer’s
		internal storage to an output device.
Output	device	A unit that takes data output from a
		computer and presents it in the form
		desired by the user.
Overstrike		A DisplayWrite 370 function in which
		two characters may be printed in the
		same presentation position.
P
PA1		Program attention key 1.
PA2		Program attention key 2.
Page control		The method by which page boundaries
		(margins) are determined. Page control
		may be done either by the host
		application or by the ALLY PLUS.
Parallel	interface	8 bits of a byte are transmitted
		simultaneously through 8 parallel wires.
Parity		A bit added to a data word that is used
		for error checking. Simple parity can be
		either odd or even.