Xerox 550 User Manual

Term
WK
x
Meaning
Write key -
bit positions 32, 33, 34,
and 35
of PSWs; they are evaluated by
the memory write-protect feature to de-
termine accessibility of real memory by
current program.
Index register address
value - 3-bit con-
tents of bit positions 12-14 (X field) of
instruction word. In instruction word,
if X
= 0, no indexing is performed;
176 Appendix B
Term
X
(cont .)
X'n'
Meaning
if X f. 0, indexing is performed (after indirect
addressing if indirect addressing is called for)
with general register X in current register block.
Hexadecimal qualifier - hexadecimal value
(n) is unsigned string of tiexad~cimal digits
(O through 9 and A through F) surrounded by
single
quotation marks and preceded by the
qualifier "X" (for example, 7B0
16
is written
X'7BO'.

Xerox 550 Specifications

General

Monthly Duty Cycle	Up to 300, 000 pages
Connectivity	Ethernet, USB
Print Speed (Color)	Up to 50 ppm
Duplex Printing	Standard
Printer Type	Laser
Supported Operating Systems	Windows, macOS, Linux
Paper Size	A4, Legal, Letter