Text preview for : C24-9007-5_360-20_diskIOCS_Mar69.pdf part of IBM C24-9007-5 360-20 diskIOCS Mar69 IBM 360 model20 C24-9007-5_360-20_diskIOCS_Mar69.pdf
Back to : C24-9007-5_360-20_diskIOC | Home
File Number S360(Mod.20)-30
Form C24-9007- 5, DPS
Sys"tems Reference Library
IBM System/360 Model 20
Disk Programming System
Input/Output Control System
This publication provides information required for
using the Disk Programming System (DPS) Input/Output
Control System (IOCS) for the IBM System/360 Model 20.
The publication contains the following information:
1. General description of the various input and output
functions provided by the IOCS.
2. Definition of the record formats proc@ssed by the
IOCS.
3. Description of the relationship between overlapping
operations and the specification of different Com-
binations-of, I/O areas and work areas.
4. Introduction to the concepts of file organization
and file processing.
5. Detailed descriptions of the IOCS imperative macro
instructions and the file definition statements.
The reader of this publication should be familiar
with basic programming concepts and with the operating
prinbiples of his system as described in the applicable
~RL publications. For a list of pertinent publica-
,tions, refer to the laM System/360 Model 20, Bibliogra-
J2hy, Form A26-3565.
r----------------------------------------------------------------------,I
I
ISixth Edition (March. 1969) I
I I
IThis is a major revision of, and obsoletes C24-9007-4. I
I I
IMost of the text has been reorganized and rewritten to make thel
Ipublication easier to understand. These improvements are not marked. I
I I
IThe technical changes incorporated in the publication relate to thel
lavailability of the IBM System/360 Model 20. Submodel 5. The sections I
Iheaded "Monitor Macro Instructions W and wThe ATENT Routine w have beenl
I added. These technical changes and additions are marked in thel
Ifollowing way: Changes to the text, and small changes to illustrations I
lare indicated by a vertical line to the left of the change; changed orl
ladded illustrations are denoted by the symbol