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File No. S360-35
Form C27-6940-2 DOS




Systems Reference Library




IBM System/360 Disk Operating System

1401/1440/1460 Emulator Programs
Compatibility Support/30
Compatibility Support/40

Program Number for CS/30: 360N-EU-484
I Program Number for CS/40: 360N-EU-485

This pUblication contains information on the emula-
tion of 1401, 1440, and 1460 object programs under the
control of the Disk Operating System. Compatibility
Support/30 and Compatibility Support/40 allow emulation
of these programs on the IBM System/360 Models 30 and
40, respectively. Compatibility Support/30 comprises
the IBM 1401/1440/1460 Emulator Program, Number 360N-
EU-484, and applicable Compatibility Features for the
Model 30. Compatibility Support/40 comprises the 1401/
1440/1460 Emulator Program, Number 360-EU-485, and the
applicable Compatibility Features for the Model 40. In
addition, the 1401, 1440, and 1460 object programs can
be run on the IBM System/360 Model 25 using the
1401/1440/1460 Emulator Program for Compatibility
Support/30 in conjunction with applicable Compatibility
Features for the Model 25.

General information concerning machine requirements,
program generation, simulation techniques, data for-
mats, control cards, and programming considerations is
included, as are detailed explanations of Operator
Service Functions, operating procedures, console mes-
sages, and special instructions added by the Compati-
bility Features for the Models 30 and 40.

The 1400 Emulator Programs under DOS allow the user
to run 1401/1440/1460 programs, with little or no
reprogramming, under the Disk Operating System in
conjunction with the Compatibility Features. This
allows 1400 programs to be run in a stacked job
environment, mixed with System/360 jobs.
PREFAC-E




This publication provides information grams; program restrictions and limitations
concerning the 1401/1440/1460 Emulator Pro- that the user must consider; information on
grams under the Disk Operating System. The uni t-record, magnetic-tape, and disk-
information is presented in eight sections. storage operations; I/O error recovery,
buffering, and device independence, and
The "Introduction" section contains a simulation of I/O devices for which there
general description of the capabilities of is no hardware compatibility; and Emulator-
the Emulator Programs and the levels of Program support of I/O operations for card
programming support; a description of the read punch, printer, magnetic tape, disk,
running of the Emulator Programs as back- and console inquiry, as well as an explana-
ground programs in a mUltiprogramming tion of the differences in printer
environment; and the minimum configuration graphics.
required to operate the Emulator Programs
under DOS, the devices from which problem
programmers can request I/O operations for The "Control Cards" section explains the
the Emulator Programs, additional features use and format of all control cards used
supported by the Emulator Programs, and the with the Emulator Programs.
DOS units and features that cannot be
utilized while the Emulator Programs are
operating. The