Xerox 560 Reference Manual page 200

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;
194 Appendix B
Term
X
(cont .)
Xln l
Meaning
if X
f
0, indexing is performed (after indirect
addressing if indirect addressing is called for)
with general registerX in current registerblock.
Hexadecimal qualifier - hexadecimal value
(n) is unsigned string of hexadecimal digits
(0 through 9 and A through F}surrounded by
single quotation marks and preceded by the
qualifier "X" (for example, 7B0 16 is written
X?BO I
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