IBM 1130 User Manual page 461

Section
Subsections Page
55
10
I
00 01
JOB AND SUBJOB
A job is defined as:
• A JOB card and all the following control rec-
ords, source programs, object programs, and data,
up to, but not including, the next JOB card.
• The processing that takes place from the de-
tection of one JOB card (or paper tape record) until
the detection of another JOB card.
A subjob is defined as:
• A monitor control record and all the following
control records, source programs, object programs,
and data, up to, but not including, the next monitor
control record.
• The processing that takes place from the de-
tection of one monitor control record (such as DUP
card, FOR card, etc.) to the detection of another
monitor control record.
A job is an independent unit of processing; a
subjob is a unit of processing that is dependent on
the subjob(s) preceding and/or following it. The
successful completion of the job depends on the
successful completion of each subjob within it. In
some cases, a subjob is not attempted if the pre-
ceding subjobs have not been successfully completed.
The JOB control record defines the start of a new
job. It causes the Supervisor to perform the job
initialization procedure, which includes:
1. Initialization of constants, parameters, etc.
2. Setting of the temporary indicator if a T is
present in column 8 of the control record. If set,
all programs or data files stored in the User Area
by DUP during the current job will be deleted auto-
matically at the end of the job (that is, at the be-
ginning of the next job) .
3. The identification of the cartridge(s) to be
used during the current job.
4. The definition of the cartridge on which the
Core Image Buffer for the current job is to be
found. Core image programs can be built faster if
the CIB is assigned to a cartridge other than the
systems cartridge. (This applies only to systems
with two or more disk drives.)
5. The definition of the cartridge whose Working
Storage is to be used by the Monitor system. (This
applies only to systems with two or more disk
drives.) Although all cartridges contain a Working
Storage area, only one will be used by the Monitor
(for its own purposes). Core image programs can
be built faster if the system Working Storage is on
some cartridge other than the systems cartridge.
They can be built even faster if the CIB, the system
Working Storage, and the monitor system itself are
on separate cartridges. Assemblies are also faster
if Working Storage is on a separate cartridge.
6. The starting of a new page. A skip to channel
1 is executed on the 1132 Printer or 1403 Printer;
ten consecutive carriage returns are made on the
console printer.