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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