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File No,. S360-20
Form C28-65S0-S OS




Systems Reference Library




IBM System/36D Operating System
System Programmer's Guide


This publication consists of self-contained
chapters, each of which provides information on
how to modify, extend, or implement capabilities
of the IBM System/360 Operating System control
program,. It is designed primarily for system
programmers responsible for maintaining,
updating, and extending the operating system
features.

Topics:

Catalog and VTOC Maintenance
Adding SVC Routines
Adding Accounting Routines
IECDSECT, IEFJFCBN, and IEFUCBOB Macro
Instructions
The Must Complete Function of ENQ/DEQ
The EXCP Macro Instruction
The XDAP Macro Instruction
The Tracing Routine
Implementing Data Set Protection
PRESRES Volume Characteristic List
Residency Options and Link Pack Area
MVT Job Queue Formatting
System Macro Instructions
Adding System Output writer Routines
Output separators
System Reader, Initiator, and writer
Cataloged Procedures
Writing Rollout/Rollin Installation
Appendages
Adding a Universal Character Set Image to the
system Library
The Shared Direct Access Device Option
The Time Slicing Facility
Graphic Job Processor Procedures
Satellite Graphic Job Processor Procedures
Preface


This publication consists of
self-contained chapters, each of which
provides information on how to modify,
extend, or implement capabilities of the
IBM System/360 Operating System control
program. Although the'information in one
chapter is sometimes related to information
in another" all chapters have been written
as separate and complete units. It is
assumed that users of this publication are
thoroughly familiar with the design of ~he
operating system and its features. Each
chapter contains its own introductory
section and list of prerequisite
publications. This organization has been
,used to reduce cross-referencing and to
facilitate the addition of new chapters.




sixth Edition (Novembe~ 1968)

This is a major revision of, and obsoletes, C28-6550-4.
Descriptions of control volume pointer entries, the EXCP
macro instruction, link pack area uses, the DEVTYPE macro
instruction, standard list IEARSVOO, and SYS1.Accr
specifications have been changed. Descriptions of
checkpoint/restart, user-written I/O appendages, the blocked
procedure library, automatic SYSIN batching, the STAE and
PURGE macro instructions, and the Satellite Graphic Job
Processor have been added. Changes to the text are indicated
by a bar (I> to the left of the change; changed illustrations
are indicated by the symbol