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IBM System/370 Guide

IBM System/370
194 pages
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Page
of
GC20-1730-0
Revised
7/14/70
By
TNL GN20-2227
IBM
programming
systems
support
of
these
trends
in
data
processing
has
been
growing
and
continues
to
be
extended.
The
System/310
Model
165
offers
the
hardware,
I/O
devices,
and
performance
capability
required
by
the
expanding
computing
environment.
30:
10
OS
SUPPORT
It
is
expected
that
the
majority
of
the
users
who
upgrade
to
the
Model
165
will
use
OS
as
their
operating
system.
The
design
of
OS
and
the
facilities
it
currently
provides
make
it
a
particularly
suitable
base
upon
which
to
build
additional
support
of
the
data
processing
trends
discussed.
Some
of
the
major
OS
features
currently
available
or
announced
are
the
following:
•
Priority
and
job
class
scheduling
for
increased
resource
utilization
•
Multiprogramming
support
of
up
to
15
user
jobs
and
multitasking
facilities
•
Automatic
data
transcription
performed
by
the
control
program
(reader
interpreters
and
output
writers)
concurrently
with
user
job
execution
•
Dynamic
resource
allocation
by
the
control
program
•
Multiple
console
support
(MCS)
and
device-independent
display
operator
console
support
(DIDOCS)
•
Extensive
teleprocessing
and
graphics
support
•
Remote
job
entry
and
conversational
remote
job
entry
•
Support
of
a
wide
range
of
interactive
(time-sharing)
environments
OS
will
be
modified
and
extended
in
future
releases
so
that
it
supports
Model
165
hardware.
Appropriate
alteration
of
the
resident
portion
of
a
control
program
(nucleus)
generated
for
a
Model
165
will
accommodate
the
fixed
storage
area
of
lower
storage
in
the
Model
165.
OS
for
the
Model
165
includes
currently
announced
OS
facilities
and
contains
additional
support
to
handle
new
Model
165
hardware
features
and
I/O
devices.
Emphasis
has
also
been
placed
on
extending
error
recovery,
recording,
diagnostic,
and
repair
procedures.
as
support
of
Model
165
features
will
be
provided
as
follows
(Programming
systems
support
of
RAS
features
is
discussed
in
Section
50).
New
instructions.
The
Assembler
F
(Type
I)
and
Assembler
H
(program
product)
language
translators
will
include
mnemonics
for
the
general
purpose
and
other
new
instructions
for
the
Model
165
so
that
these
instructions
can
be
used
in
user-written
Assembler
Language
programs.
The
currently
available
as
high-level
language
translators
will
not
generate
the
six
new
general
purpose
instructions.
Extended
precision
floating
point.
Assemblers
F
and
H
will
include
support
of
the
extended
precision
floating-point
data
format
and
instructions.
In
addition,
extended
precision
will
be
supported
by
the
FORTRAN
H
and
the
PL/I
Optimizing
Compiler
program
products.
The
implementation
of
extended
precision
support
in
FORTRAN
Hand
PL/I
is
such
that
the
language
translator
and
the
processing
programs
generated
to
includa
extended
precision
operations
can
operate
on
a
System/370
or
System/360
with
or
without
extended
precision
hardware.
The
language
translator
contains
extended
precision
instructions
and
53

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IBM System/370 Specifications

General IconGeneral
BrandIBM
ModelSystem/370
CategoryServer
LanguageEnglish

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