IBM System/360 2050 Maintenance Manual page 51

Processing unit
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178 or 18C
Stop
OK~
180
OY510
IAR
+
4 ( 184) to SAR
(Branch Adr for OK),
Test PSS, Then Reset
'\;,. Off
IAR
+
4 (188) to SAR
(Branch Adr for NG)
QY510
No Op
F44
FSO
From Port 1 of 2
QY310
Reset FLT Op Reg
IAR to SAR
FBl
QY310
FBO,FA8
Scan-In Test Words 1-9,
Test PSS, Then Reset
154 if OK
160 if NG
I
NG---Stuck On
On
FOB
IAR
+ 4
to SAR
QY310
F28, F27
Scan-In Test Words
10,
11
QY110
F4E
IAR
+
4 to SAR
(AdrofTestWord 12(LCW)
QY110
F
lF
No Op
QY110
F8B, F49
SDR ( 19-30) to ROAR
SDR (5) to PSS
OY310
FOA
No Op
(IAR
=
174)
178 if Stuck On
180 if OK
18C if Stuck Off
000 if Stuck On or Off
F44 if OK
Off
QY310
F48
SDR (Bronch Adr) to IAR
QY310
Reset FLT Op Reg
IAR
to
SAR
QY310
FBl
FBO, FAS
Scan•ln Test Words 1-9,
Test PSS, Then Reset
198 if PSS Was Off (OK)
!SC if PSS Was On (NG)
OK now but moy
have been on
(NG~
at preceding
PSS
I
Stuck On (NG)
On
test
QY310
F08
.-~~~
.......
~~~--.
IAR + 4 to SAR
QY310
F28,F27
Scan-In Test W0<ds 10, 11
QY110
F4E
!AR
+
4 to SAR
(Next LCW Adr--- f0<
Control and ROAR Adr)
QY310
FOA
No Op
(IAR
=
lAC)
lBC if OK
lBO if NG
1C4 if OK
1B8 NG (Was On, Now Off)
180 NG (Was and Still is Stuck On)
180 or 188
FIGURE 29. HARDCORE TEST SAMPLE: ROS MODE (PART 2 OF 2)
Next Test
Srop
50
(3/71)
Model 50 FEMM

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