IBM Series 1 User Manual page 8

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rhis publication provides reference information to aid in
desiqninq loqic for communicating with an IBM 4953 or 4955
Proc€ssor throuqh the input/output channel and several
desiqnated user attachment features. This information is
primarily intended for experienced engineers and
technicians. This publication will also be useful to
cus tamers who nee d deta iled inf or aa ti cn
f
or connecting their
instruments and devices to the various attachment features.
The reader should have a workinq knowledge of the
information contained in the manuals listed in the
"Prerequisite Publications" section of this preface. These
publications contain information about: the processor, the
channel, the operate I/O instruction, device control blocks
with their associated commands and parameters, and the
interrupt mechanism. The reader should especially note that
the machine code information for the user attachment
features can be found in the ~rerequisite publications.
This information includes: command formats and descriptions,
condition codes, and status words.
Additional ~ublications that the reader will find useful
are listed in the tiRe la ted Pu.blications" section of this
preface. These publications provide physical planning
information and list the available machines and features.
li2tg.
The processor I/O channel architecture, or any aspect
of the I/O interfaces described in this publication, may be
altered from time to time by IBM or may be withdrawn by IBM
in part or in whole.
Preface
vii