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File No. S360-36
GY28-660S-4




Program Logic




IBM System/360 Operating System
Introduction to Control Program Logic


PrDgram Number 360S-CI-505
360S-DM-S08


This pUblication describes the components of the
primary control program (PCP) configuration of IBM
Systern/360 Operating System and indicates the program
logic manuals that describe these components. It con-
tains general descriptions of the organization of the
control program in both main and auxiliary storage, the
flow of program control during a job step, the flow of
control for supervisor operation, and the processing
for input/output operations. The appendix contains the
names, numbers, and macro instructions associated with
the IBM-supplied SVC routines.

Program Logic Manuals are intended for use by IBM
customer engineers involved in program maintenance, and
by system programmers involved in altering the program
design. Program logic information is not necessary for
program operation and use; therefore, distribution of
this manual is limited to persons with program main-
tenance or modification responsibilities.
Preface


This publication is an introduction to of CPU control for various operations are
the logic of the primary control program exameles of typical uses of control program
and to the program logic manuals t~t~ f~c~lit