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File No. S360-36
Form Y27-7128-4
Program Logic
IBM System/360 Operating System
Control Program With MFT
Program Logic Manual
Program Number 360S-CI-505
This publication describes the internal logic of
the IBM System/360 Operating System Control Pro-
gram with MFT. The publication provides an intro-
duction to control program logic and describes the
components of the program. It also describes the
initialization of the operating system, the func-
tions of the supervisor that differ from those of
the PCP and MVT supervisors and the functions of
job management that differ from those of PCP and
MVT job management.
The appendix contains a description of all rou-
tines, major tables, and work areas used by MF~,
and flowcharts of the routines of MFT that differ
from those of either of the other control
programs.
Program Logic Manuals are intended for use by
IBM customer engineers involved in program main-
tenance, and by system programmers involved in
altering the program design. Program logic infor-
mation is not necessary for program operation and
use; therefore, distribution of this manual is
limited to persons with program maintenance or
modification responsibilities.
Restricted Distribution
RESTRICTED DISTRIBUTION: This publication is intended pri-
marily for use by IBM personnel involved in program design
and maintenan.ce. It may not be made available to others
without the approval of local IBM management.
Fifth Edition (June, 1969)
This is a major reVl.Sl.on of, and obsoletes" Y27-7128-3 and
Technical Newsletters Y2B-2349 and Y28-2376. ~he text and
illustrations have been changed to reflect the following: