IBM System/370 145 Manual page 2

Third Edition (August 1972)
This is a major revision obsoleting GC20-1734-1. Text has been added or changed to in-
clude information about the following: EC mode; dynamic address translation; channel
indirect data addressing; program event recording; CPU timer and clock comparator; new
System/370 instructions; store status facility; integrated storage control for 3330-series
disk storage; 3830 Storage Control Model 2; virtual storage concepts, advantages,
terminology, and performance factors; DOS/VS, OS/VS1, and OS/VS2 support of
Model 145 hardware features; DOS Version 4 support; and miscellaneous additions and
corrections. Changes to the text and illustrations are denoted by the vertical line to the
left of the change. In addition, this publication is now structured as a base publication
for which optional programming systems supplements describing virtual storage operating
systems can be ordered.
This guide is intended for planning purposes only. It will be updated from time to time;
however, the reader should remember that the authoritative sources of system informa-
tion are the system library publications for the Model 145 , its associated components and
its programming support. These pUblications will first reflect any changes.
Requests for copies of IBM publications should be made to your IBM representative or to
the IBM branch office serving your locality.
A form has been provided at the back of this publication for readers' comments. If this
form has been removed, address comments to: IBM Corporation, Technical Publications
Department, 1133 Westchester Avenue, White Plains, New York 10604. Comments become
the property of IBM.
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Copyright International Business Machines Corporation 1970, 1971, 1972