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GA 22-6955-1
File No. 5/370-13
709/7090/7094/709411
Compatibility Feature
for IBM System/370
Systems Models 165,165 II, and 168
)
)
Preface
This publication contains information about the IBM 7094 IBM System/370 Systenz Summary, GA22-7001.
compatibility feature (# 7119), which adds interpretive IBM Systeln/370 Principles of Operation , GA22-7000.
facilities to System/370 Models 165, 165 II, and 168 for 7094 OS Emulator 011 Models 165/168 Reference,
use by the IBM 7094 emulator program. The combination GC27-6951.
of the feature and the program (referred to as the 7094
emulator) allows execution on IBM System/370 Models
165, 165 II, and 168 of programs written for the IBM 709,
7090, 7094, and 7094 II Data Processing Systems.
The IBM 7094 compatibility feature, operating in con- Organization of This Publication
junction with the IBM 7094 integrated emulator program, To assist the reader, the information in this publication has
simulates the operation of an IBM 7094 Data Processing been organized as follows:
System in an IBM System/370. Operating together, the The "Introduction" contains a general description of
emulator program and the compatibility feature consititute emulation and provides basic information on the compatibi-
a hardware-aided simulator referred to as an emulator. lity feature and the emulator program.
Through the emulator, a System/370 Model 165, 165 II, or "Emulator Organization" describes the functions of the
168 is, in effect, a 7094 that executes 7094 programs. The compatibility feature and the emulator program and ex-
emulator requires a minimum region or partition, when plains their relationship to each other. This section also
operating under a System/360 or System/370 controV includes information on acceptable data fonnats and
program., of approximately 380,000 bytes. program/feature comnlunication.
"Emulator Instruction Set" describes the format, applica-
Prerequisite Publications tion, and action of each instruction provided by the com-
To obtain maximum benefit from this publication, the
reader should be familiar with the information contained in
patibility feature.
The Appendixes contain information concerning timing,
)
the following publications: conversion of graphics, and internal codes and addresses.
Second Edition (May 1973)
This is a major revision of, and obsoletes GA22-6955-0, and Technical Newsletter
GN22-o427.
Changes are continually made to the information herein; before using this
publication in connection with the operation of IBM systems, refer to the latest
IBM System/360 and System/370 Bibliography, GA22-6822, for the editions that
are applicable and current. A technical change to the text or to an illustration is
indicated by a vertical line to the left of the change. Added information is
indicated by a vertical line to the left of the addition.
Requests for copies of IBM publications should be made to your IBM
representative or to the IBM branch office serving your locality.
This manual has been prepared by the IBM System Products Division, Product
Publications, Dept. B98, PO Box 390, Poughkeepsie, N.Y. 12602. A form for
readers' comments is provided at the back of the publication. If the form has been
removed, comments may be sent to the above address. Comments become the
property of IB~L )