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File S360(Mod 20)-30
Form C24-9003-4 TPS
Systems Reference Library
IBM System/360 Model 20
Tape Programming System
Input/Output Control System
This publication describes the functions, principal
features, and use of the Input/Output Control System
supplied by IBM as part of the Model 20 Tape Program-
ming System (TPS). This Input/Output Control System
(IOCS) facilitates the programming of input/output
operations.
The following subjects are covered: (1) the defini-
tion statements that describe the files to be pro-
cessed, (2) the initialization macro instruction that
makes the files available to the system for data input
or data output, (3) the processing macro instructions
that cause input/output operations, and (4) the comple-
tion macro instructions that terminate processing of
data for one or more of the files used in an
application.
Also included is a section containing general pro-
gramming considerations, e.g., information about block-
ing and deblocking of records, combinations of input/
output and work areas, tape error routines, and regis-
,I ter usage. Programming examples are also given.
Readers of this publication should be thoroughly
familiar with the contents of the SRL publication IBM
System/360 Model 20, Functional Characteristics, Form
A26-5847.
Titles and abstracts of other related publications
are given in the publication IBM System/360 Model 20
Bibliography, Form A 26-3565.
This publication is intended for Model 20 Depending on the equipment and programs
programmers using the TPS Input/Output Con- used, the following publications are also
trol System. required:
The reader should be familiar with basic
programming concepts and with the operating
principles of his system as described in