Installation manual

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The
9370
system
includes
the
9370
Processors,
which
are
air-cooled,
compatible
with
System/370,
and
reside
in
the
IBM
9309
Rack
Enclosure
(for
clarity,
rack
will
be
used
in
the
rest
of
this
book).
There
are
four
versions
of
the
9370
Processor.
9373
Model
20
9375
Models
40
and
60
9377
Model
90.
These
processors
use
microcode-driven
input/output
(I/O)
controllers
(residing
on
logic
cards)
to
attach
I/O
units.
Some
of
the
highlights
of
the
9370
system
include:
Rack-mounted
I/O
units
Direct
access
storage
units
Tape
units
An
integrated
DASD/Tape
Controller
A System/370
Block
Multiplexer
Channel,
which
allows
you
to
use
System/370
channel-attached
devices
A
Work
Station
Subsystem
Controller
(uses
3270-type
terminals)
Four
communication
subsystems,
which
allow
you
to
communicate
over
synchronous
and
asynchronous
lines
Local
Area
Network
subsystem.
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