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File No. 5360-31
Order No. GY28-6714-1




Program Logic




IBM System/360 Operating System
Loader
Program Logic Manual


This publication describes the internal logic of the
IBM Systeml360 operating System Loader. The Loader
functions as a processing program to combine and link
input object and load modules in main storage and to
pass control directly to the loaded program for its
execution. This publication identifies areas of the
program that perform specific functions and relates
those areas to the program listing.

This publication is intended for persons involved in
program maintenance, or system programmers who are
altering the program design; it is not needed for
normal use or operation of the program described.
The information on the Time Sharing Option (TSO) in this

manual should be used for planning purposes only until such

time as the option is available.




This is a major revision of, and makes obsolete, Order No. GY28-6714-0
and Technical Newsletters GY28-2401 and GY28-6405. It contains
information concerning a new Compiler/Loader interface, the new SYSTERM
data set, and new Loader options. All changes to the text, and small
changes to illustrations, are indicated by a vertical line to the left
of the change; changed or added illustrations are denoted by the symbol