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File No. S360-01
Form A22-6875-5
Systems Reference Library
IBM System/360 Model 44
Functional Characteristics
This manual describes the system structure, features,
instruction timings and formulas, channels, device ad-
dressing, and operator controls unique to System/360
Model 44.
It is assumed the reader has a knowledge of the
System/360 as defined in the IBM System/360 Prin-
ciples of Operation, Form A22-6821 and the IBM Sys-
tem/360 System Summary, Form A22-6810.
For installations using the direct word, direct data
channel, or priority interrupt features, a companion
publication is Data Acquisition Special Features for
the IBM System/360 Model 44, Form A22-6900. Other
related literature is described in IBM System/360 Bib-
liography, Form A22-6822.
SIXTH EDITION
This is a major revision of, and obsoletes, A22-6875-3 and -4 and Technical News-
letter N22-0253. The section "Instruction Timing Formulas" has been added.
Other changes to the text are indicated by a vertical line to the left of the
change; new and revised illustrations are denoted by the symbol