IBM System/360 20 User Manual

Whenever a programmed halt occurs, the U-L
fields on the CPU con"sole contain t he code
99.
In most cases, Frocessing can be resumed
by following the described restart proce-
dure. If the normal restart procedure
fails, press the System Reset key on the
CPU and restart (reload) the interrupted
program. If at this point it is still
impossible to resume successful operation,
the attention of an IBM customer engineer
is required. For a Model 20, Submodel 5
installation, try to restore the micro pro-
gram before calling a customer engineer.
(Refer to Appendix B. l1icrQ_PrQ.9.£.~I!L!&~Q
g.f:oc§.d ure~.)
The section PrQ9".rammed-H~J:.LQi§£.1ay§
contains a list of all programmed-halt
codes that may be displayed in the E-S-T-R
fields on the CPU console during the
execution of IBM-supplied programs.
Wherever possible, a brief restart pro-
cedure is given in the list of halt codes
for ~uick reference. Where this has not
been possible due to the length of the pro-
cedure, or where additional i-nforma'tion is
re~uired to clarify the brief restart pro-
cedure in the list, a reference number is
given in the rightmost column of the list.
This number corresfonds to a number in the
section gg§:.t~!:1_g.f:Qce~'yre§, where the
appropriate information can be found.
In the section Besta!:!_g£Qceg'y!:~~ and in
the list of g!:ogrammed-H~J:.l~i2El~Y2,
codes, data, and addresses of storage loca-
tions are given in hexadecimal notation.
General register numbers are given in
decimal notation.
Two types of programmed halts may occur:
device-dependent halts and program-depen-
dent halts. From the code displayed, the
user can determine the type of halt that
occurred, and the device or program to
which it pertains. Figure 44 shows the
codes used for device-dependent halts, and
Figure 45 those used for program-dependent
halts.
r-----------------,-----------------------,
1 Display J Device I
1 E S T R I I
~ -+-----------------J
I 0 1 x x J 2501 I
1 0 2 x x I 2560, 2520 I
I 0 3 x x I 1442 1
I 0 4 x x I 1403, 2203 1
I 0 5 x x 1 ESCA J
1 0 6 x x I 1419, 1259 I
I 0 7 x x I 2415 J
L ________________ -L ______________________ -J
Figure 44. Device-Dependent Halts
j
lDisplay
I E-S-T-R
1---
10 5 x x
10 A 0 X
lOB 0 x
JOB 1 x
o B 2 x
o B 3 x
o B 4 x
o B 5 x
o B F x
a C x x
o D x x
a E x x
1 A x x
1 BOx
1 B 1 X
1 B 2 x
1 B 3 x
1 B 4 x
1 B 5 x
1 B 6 x
1 B 7 x
1 B 8 x
1 B A x
1 B D x
11 ~ E x
11 C x x
11 D x x
i
IProgram
1
1
BSCA laCS
All pr9grams
IPL
IPL
Basic Monitor
Basic Monitor
Job Control
1
I
--.
I
I
Error Statistics
Distribution-Package Retrieval
Utility
RPG Object
I/O macros and RPG I/O Routines
Assembler
Load System Tape
ILoad System Tape
ILinkage Editor
ILinkage Editor
ICore-Image Maintenance
ICore-Image Maintenance
IMacro Maintenance
IMacro Maintenance
IDirectory Service
I Copy System Tape
ICore-Image Service/~acro
I Core-Image Service/Macro
ISort/Merge
IRPG Compiler
I
1
I
I
I
1
I
Service)
Servicel
I
I
L _____ ---L..-
.Figure 45. Program-Dependent Halts
When a program-dependent halt has been
caused by an error during a tape operation,
it is sometimes necessary to identify the
tape drive concerned. In these cases, the
displacement of the affected logical unit
block (symbolic device address) from the
beginning of the logical unit table is con-
tained in register 13, in hexadecimal nota-
tion. Figure 46 shows the arrangement of
logical unit blocks in the table, and the
displacement of each block.
Programmed-Halt Displays and Restart Procedures 105

IBM System/360 20 Specifications

General

Brand	IBM
Model	System/360 20
Category	Storage
Language	English