Table of Contents
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Note: For each entry in this index, the number of the most significant page is listed first. Any pages thereafter are listed in
numerical sequence.
N
nonallowed operations, 76,22,23
nonexistent instructions, 22,23,76
nonexistent memory addresses, 24,23,76
normalized control, floating-point, 17,35,50
numbers
o
decimal, 54
floating-point, 50,51
operator controls, 93-99
optional features,
4
overflow
decimal, 23,26,55
fixed-point, 25,26
floating-point characteristic, 52,26,51
override interrupt group, 18
p
packed decimal format, 55
par i ty error, memory, 85, 88, 97
peripheral equipment, 3,4
power fail-safe, 20, 1
priority interrupt chain, 18
privileged instructions, 75-88
violation trap, 23,24,76
processor control panel, 93-98
program status doubleword, 17,22,24,75,76,94
push-down
R
instructions, 67-72,25
stack limit trap, 25,23,68
read di rect, 80
Read order, 90
real-time clocks, 5, 18, 19
real-time features, 4
reference address, 12,30
register address, 13,30
register block pointer, 11, 18,77
s
selector lOP, 89,3,5
Sense order, 90
sense switches, 98,80
Shift instructions, 47-49, 124
significance control, floating-point, 52, 17,26,35,37
single-instruction interrupt, 22
slave mode, 9,17
stack pointer doubl eword, 68,70
standard features, 4
states of an interrupt level, 20
Stop order, 91
system
T
input/output, 82-92
interrupt, 18-22
organ ization, SIGMA 6, 8-27
SIGMA 6, 1-7
trap, 22-27
time of interrupt occurrence, 21
time-sharing features, 6
Transfer in Channel, 90
translate instruction, 63,6
trap, 22-27
u
Call instruction, 74,23,27, 77
decimal arithmetic fault, 26, 17,23
fixed-point overflow, 25,17,23,30
floating-point arithmetic fault, 26,23,52
masks, 17,23,29
memory protection violation, 24,23,76
nonallowed operations, 22,23,76
nonexistent instructions, 24,23,76
nonexistent memory address, 24,23,76
privileged instruction violation, 24,23,76
push-down stack limit, 25,23,68
un implemented instruction, 24,23,52
watchdog timer runout, 26,23
un impl emented instructions, 24,23,52
unusual end, 88,92
updated instruction address, 72
v
virtual address, 11, 14, 15,47,82
w
watchdog timer runout trap, 26,23
word format,
8
write
z
direct, 80
key, 11,15,16,17
lock, 15, 11,79
lock control image, 79
lock loading process, 79
order, 90
zero byte count interrupt, 88,91
zero control , floating-point, 52, 17,26,31
F
37
zoned decimal format, 55
Index
137
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