IBM System/360 2050 Maintenance Manual page 194

Scan pass stat -- see pass trigger 33
Scan test counter 33
Scan test stat -- see binary trigger 33
Scheduled maintenance
79
SCOPEX 61
Sections, control panel
A 140
B, C, D, E, and F
142
G 143
Hand
J
149
K
143
L 150
M 150
N 154
Segment, referred to by SCOPEX 61
Segments (one-cycle test groups)
41
Selector channel -- see CPU and channels
A clock 107
B clock 107
C reg set 103
channel reset 103
clock-stepping procedure 112
cycle counter 107
OTC hold check 109
error handling
15
IF service out delay 103
indicator check 108
manual stop control
107
operation control check 109
'ingleshot adjustment 109
tag generator 107
Selector Channel Roller Analysis
A-clock latches 147
BAC latch 145
BC mod enable 148
BC ready 147
byte counter 144
CD 148
channel checks 145
channel in u1e 147
channel stop 148
clock AO, Al, clock stop
146
common channel detect 146
compare equal, unequal 147
cycle counter phase A
145
enable stat 149
end of record 144
end register
144
finish latch 149
first byte
149
first
word
149
flag register 149
general purpose register 148
IF
CDA fint byte 148
IF in tags 148
IF out tags 148
inhibit read
store
146
instruction inhibit 147
instruction scan latch 147
last word register 144
LS enable 144
LS request 146
multi-purpo11e latches
149
Op in 148
Op In test
148
PCI request 146
poll
147
poll interrupt end
position register
147
145
position register transfer
146
read latches 145
record end 148
register full 145
request in
146
request register 146
select in 148
select out
148
service out hold
149
special purpose latches
147
stat next 149
stop
148
stop release 149
stop routine 148
suppress out 149
total record fetch 149
unit address to bus out 147
unit select address out 147
write chain proceed
149
write chain ready
148
write latches 145
Sensitive net--see SCOPEX 61
Sequence counter
22
Sequence counter mode 20
entnes/ObJectives/controis 19
FLT load 42
logout, portion of 24
operations 20
trigger and request logic 37
Sequence stats 22
Service checks
see CPU and channels
see local storage
see main storage
see power system
see read-only storage
see selector channel
see storage protect
see 1052 Adapter
Set IC 142
Sh moo
local storage 93
Singleshots 109
Specifications, frame 139
Start switch 142
Start 1/0 diagnose instruction
Stat setting 150
Status indicaton 134
Stop IWi tch 151
Stopped state 151
Storage
see bump storage
see local storage
see main storage
see read-only storage
Storage holdoff 36
Storage p-otect
diagnostics 76
115
driven and terminating· diodes 102
Index (3/71) 193