IBM System/360 2050 User Manual

NOTE: This is on actual ROS mode hardcore test, EC level 255452,
for the progressive scan stat (PSS). This flowchart is for instructional
purposes only, as future engineering changes may alter the method af testing.
See Figure 25 or 26
S .. quence Counter Mode Reset IAR and
Ga to MS Mode
{
Fram End af FLT Lood Sequence,
Seq Stat 4 On, and
Seq Ctr = 5
.L----------'--- --- --- -- -- -- --
Main Stare Mo<ie
ROS Mode
Op 0
IAR 24
No Op
OpB
IM 28
Stop
QY110
FOB
No Op
QY110 F4E
IAR+4 (148) to SAR
(location of LCW)
QY110
FlF
No Op
QY110
F88, F49
SOR (5) to PSS
SOR (19-30) to ROAR
QY110 FOB
No Op
QY110
flE
IAR + 4 ( 14C) to SAR
(location of LCW)
QY110
FlF
No Op
QYllO F811,F49
SOR (5) to PSS
SOR ( 19-30) to ROAR
OpO
IAR 04-18
No Op
{
Words 04-18 are treated as na op in
MS mode. Words 04- 14 cause a tape
rewind if IPL loaded instead of FLT loaded.
Op 7
IAR 1C
SOR (19-30) ta ROAR
Reset Bin Tgr
Op E
IAR 20
FOii
SOR ( 12-31) to IAR if 13C
Bin Tgr Is Off
Stop Loop ---
ROS Mode
IAR 140
No Op
IAR 144
Failed
On
NG--- ;\
Stuck Off \
Off
On
FOii
On
F44
QY510
F44
IAR + 4 ( 150) to SAR
(Bronch Adr for NG),
Test PSS, Then Reset
QY510
F82
IAR + 4 ( 154) to SAR
(llranch Adr for OK)
QY510
F80
No Op
QY310
F48
SOR (llronch Adr) to IAR
To Port 2 of 2
FIGURE 29. HARDCORE TEST SAMPLE: ROS MODE (PART 1 OF 2)
Maintenance Features (3/71) 49

IBM System/360 2050 Specifications

General

Brand	IBM
Model	System/360 2050
Category	Computer Hardware
Language	English