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File No. S360-36
Forw C28-2004-2 TSS




Systems Reference Library




IBM System/360 Time Sharing System
Assembler User Macro Instructions
IBM System/360 Time Sharing System provides compre-
hensive program and data management services which,
together with communication, tulk output, and interrup-
tion handling services, are requested through macro
instructions. These rracro instructions are written in
the assembler language as an aid to programming and
processing time-shared tasks.
PREFACE




This publication contains a description macro instructions requires detailed know-
of Time Sharing System/360 (TSS/360) macro ledge of system operation, these macro
instructions available to the assembler instructions are not of concern to the
language user. average TSS/360 user. Detailed descrip-
tions are given in IBM System/360 Time
The publication is divided into three Sharing System: System Programmer's Guide,
parts: Form C28-2008.

Part I: User Maco Instructions - con-
tains an introduction to user macro
instructions and their functional cate- Prerequisite Publications
gories and describes the basic principals
of the TSS/360 macro instruction language. IBM System/360 Time Sharing System:
Value mnemonics and basic macro instruction Concepts and Facilities, Form C28-2003
formats are discussed in detail.
IBM System/360 Time Sharing System:
Part II: Functional Macro Instruction Assembler Language, Form C28-2000
Descriptions - contains detailed descrip-
tions of the macro instructions available Other recommended publications are:
with TSS/360 within the framework of their
major functional purpose. IBM System/360 Time Sharing System:
Linkage Editor, Form C28-2005
Appendixes -- Use of exit routines, con-
trol characters available with certain data IBM System/360 Time Sharing System:
management facilities, and interrupt handl- Command System User's Guide, Form
ing routines are explained. C28-2001

All macro instructions available to the IBM System/360 Time Sharinq System:
assembler language user are listed in this Assembler Programmer's Guide, Form
publication. However, since use of certain C28-2032




Third Edition (September 1968)

This editor has been updated technically; by including the Command
System macro instructions, AETD, OBEY, PRMPT, MCA~;T, SYSI~, BPKD, ~nd.
GDV; by adding the SIC operand to the GATE macro J.nstruct~on descr~pt~ons;
and by adding a return code to the list of ret~rn.codes fo: the COD ~acro
instruction. In addition, it has been reorgan~zed by plac~ng macro ~n
struction descriptions within the framework of thE!ir major functiona~
categories. It should be noted that the DCB, OPEN, and CLOSE macr~ ~n
structions which formerly appeared within each access method group~ng
now only appearance.

This edition is current with Version 3, Modification 0, and remains
in effect for all subsequent versions or modifica1:ions of IBM System/360
Time Sharing System unless otherwise indicated. !3ignificant changes or
additions to this publication will be provided in new editions or Techn-
ical Newsletters. Before using this publication in connection with the
operation of IBM systems, refer to the latest edii:ion of IBM System/360
Time Sharing System: Addendum, Form C28-2043, for the editions of pub-
lications that are applicable and current.

Specifications contained herein are subject to change from time to
time. Any such change will be reported in subsequent revisions or
Technical Newsletters.

This publication was prepared for production u!;ing an IBM computer to
update the text and to control the page and line format. Page impres-
sions for photo-offset printing were obtained froIn 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 servinq your locality.

A form is provided at the back of this publicai:ion for reader's com-
ments. If the form has been removed, comments mav be addressed to IBM
Corporation, Time Sharing System/360 Programming ]'ublications, Depart-
ment 561, 2651 Strang Blvd., Yorktown Heights, N. Y. 10598