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File Number S360-36 (DOS)
Order No. GY24-5086-4
Program Logic
DOS IPL and Job Control
Program Number 360N-CL-453
This reference publication describes the internal logic
of the IBM Operating System, Initial Program Load (IPL)
and Job Control Programs. It is intended for use by
persons involved in program maintenance and by system
programmers who are altering the program design.
Program logic information is not needed for normal
operation of the IPL and Job Control Programs. It is
designed to be used as a supplement to the program
listing.
Effective use of this manual requires an
understanding of IBM system/360 or System/370 operation
and of the IBM Disk Operating system control and
service programs, macro instructions, and operating
procedures. Reference publications for this
information are listed in the Preface of this manual.
For titles and abstracts of other associated
publications, see the IBM System/360 and system/370
Bibliography, GA22-6822.
DOS Release 25
I Fifth Edition (June 1971)
This publication was formerly titled IBM System/360 Disk Operating System
IPL and Job Control Programs. Although titles of some DOS publications
(including this one) have been simplified, the change does not affect the
contents of the publications.
This edition applies to Release 25 of the IBM Disk Operating system and to
all subsequent releases until otherwise indicated in new editions or
Technical Newsletters. Changes are continually made to the specifications
herein; before using this publication in connection with the operation of
IBM systems, consult the latest System/360 and System/370 SRL Newsletter,
GN20-0360, for the editions that are applicable and current.
I This edition is a major revision of, and obsoletes, Y24-5086-3.
Summary of Amendments
This edition contains maintenance changes, and it reflects Job Accounting
Interface, OLTEP, Data Set security, PCIL (Private Core Image Library),
MCAR/CCH support, and RDE (Reliability Data Extractor). The IBM 3211
Printer and the IBM 1255/1259 Magnetic Character Readers are also supported
in this edition.
The flowchart symbols used in this manual conform with American National
Standards Institute, Inc., flowcharting standards. See Appendix C for an
explanation of the new symbols.
Changes or additions to the text and illustrations are indicated by a
vertical line to the left of the change.
Requests for copies of IBM publications should be made to your IBM
representative or to the IBM branch office serving your locality.
A form for readers' comments is provided at the back of this publication.
If the form has been removed, comments may be addressed to IBM Laboratory,
Publications Dept., P.O. Box 24, Uithoorn, Netherlands. comments become
the property of IBM.
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