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File No. 8360-36
GY28-2047-4

Program Logic

Version 8.1

IBM System/360 Time Sharing System
Operator Task and Bulk I/O

This publication describes the internal logic of the
Operator Task, Batch Monitor, BULKIO Preprocessor,
BULKIO Task, and certain command and macro instruction
processing routines associated with the above tasks,
which operate under the IBM Systero/360 Time sharing
System. The intended audience is the system programmer
concerned with the maintenance of these system tasks.
The book consists of an introduction to main operator
control and nonconversational operations, and a
description of the Operator Task and Batch Monitor, the
BULKIO Preprocessor, the BULKIO Task, the command
routines, macro instruction handling, and time shared
utility programs. Logic flowcharts are provided for
all the routines discussed. Appendixes detail control
blocks used, external modules called, a module
directory, the active remote table, and the Operator
Task and BULKIO modules using RCR macro instructions.

Prerequisite publications

The reader must be familiar with the information
contained in:

IBM System/360 Time Sharing System:
Concepts and Facilities, GC28-2003
System Messages, GC28-2037
System Control Blocks Program Logic Manual,
GY28-2011
PREFACE

This publication describes the internal of the individual programs. The manual
logic of the operator Task, Batch Monitor. provides flowcharts for the above programs
BULKIO Preprocessor, and BULKIO task and appendixes that detail data areas and
programs, as well as certain command and modules called by these programs.
macro instruction processors. The programs
may be initiated by the System Operator or
by the Batch Monitor as background tasks. This manual requires familiarity with
overall TSS/360 techniques and terminology,
The manual discusses: as ccntained in:

Batch Monitor and Operator Task
(TASKID 001). IBM System/360 Time Sharing System:
Concepts and Facilities, GC2S-2003.
BULKIO Preprocessor. System Messages, GC28-2037.
System Control Blocks Program Logic
BULKIO Task (TASKID 002). Manudl, GY28-2011.

Command Processors.
In addition, familiarity with the
Macro Instruction Processors. following publication is highly
recommended:
Time Shared Utility Proce5sors.
IBM System/360 Time Sharing System:
A brief introduction to nonconversational Command System Program Logic Manual,
processing appears before the discussions GY28-2013.

Fifth Edition (Sept:ember 1971)

This is a major revision of, and makes obsolete,
GY28-2047-3, and TNL GN28-3l33.

This edition is current with Version 8, Modification 1 of
IBM Systern/360 Time Sharing System, and remains in effect for
all subsequent versions or modifications unless otherwise
noted. Significant changes or additions to this publication
will be provided in new editions or Technical Newsletters.
Before using this publication, refer to the latest edition of
IBM Systeml360 Time Sharing System: Addendwn, GC28-2043,
which ffidY contain information pertinent to the topics covered
in this edition. The Addendum also lists the editions of all
TSS/360 publications that are applicable and current.

This publication was prepared for production using an IBM computer to
update the text and to control the page and line format. Page
impressions for photo-offset printing were obt"ained from an IBM 1403
Printer using a special print chain.

Requests for copies of IBM publications should be made to your IBM
representative or to the IBM branch office serving your locality.

A form is provided at the back of this publication for reader's
currunents. If the form has been removed, comments may be addressed to
IBM corporation, Department 643, Neighborhood Road, Kingston, N.Y.
12401

copyright International Business Machines corporation 1969, 1970,1971
CONTENTS

SECTION 1: INTRODUCTION '1'0 MAIN OPERATOR CONTROL AND
NONCONVBRSATIONAL OPERATIONS