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Publication Number File Number
SA22-7125- 2 5370-01
Third Inition (August 1987)
This edition obsoletes and replaces the previous edition, SA22-7125-1. It contains a number of detailed
changes, which are indicated by a vertical line to the left of the change.
Changes are made occasionally to the information herein; before using this publication in connection with
the operation of IBM equipment, refer to the latest IBM System/370, 30xx, and 4300 Processors Bibli-
ography, GC20-000I, for the editions that are applicable and current.
IBM may have patents or pending patent applications covering subject matter described herein. Furnishing
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trademarks, copyrights, or other rights of IBM or of any third party, or any right to refer to IBM in any