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IBM 7090 User Manual

IBM 7090
190 pages
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1.
O.
00
INTRODUCTION
TO
THE
IBM
7090
DATA PROCESSING SYSTEM
The
IBM
7090
Data
Processing
System
is
a
solid-state
digital
computer
that
is
approx-
imately
six
times
faster
than
its
vacuum
tube
predecessor,
the
IBM
709.
Along
with
increased
speed,
the
7090
is
also
mbre
versatile.
It
can
perform
more
than
200
distinct
operations.
The
7090
is
used
in
such
fields
as
airplane,
rocket,
and
missile
design,
atomic
research,
weather,
and
missile
tracking.
Using
this
computer,
calculations
in
these
fields
can
be
done
in
much
more
detail
and
with
greater
accuracy
than
ever
before.
Much of
the
need
for
experimental
testing
is
also
eliminated;
rapid,
detailed
calcula-
tions
during
design
can
foresee
many
troubles
that
formerly
would
be
indicated
only
by
testing
an
assembly.
The
IBM
7090
is
also
advantageous
and
economically
feasible
for
business
paper
work
such
as
payroll,
billing,
and
sales
analysis.
Management,
with
the
aid
of
such
a
computer,
can
base
business
decisions
on
more
up-to-date
information
than
was
ever
before
possible.
1.1.00
GENERAL
SYSTEM
OPERATION
A
computer
system
may
be
made
to
add,
subtract,
multiply
or
divide.
According
to
its
make-up,
a
system
may
also
print,
read
cards,
punch
cards,
read
or
write
mag-
netic
tape,
or
perform
many
logic
operations.
Shifting
numbers
right
or
left,
setting
the
algebraic
sign,
and
comparing
the
size
of
two
numbers
are
examples
of
logic
oper-
ations.
To
solve
a
problem,
a
sequence
of
arithmetic
and
logic
operations
and
the
required
data
are
needed.
A
computer
does
one
operation
at
a
time.
When
one
operation
is
complete,
the
next
one
in
sequence
begins.
Executing
operations
continues
until
the
sequence
has
run
its
course
and
the
final
answer
to
the
problem
has
been
computed.
The
sequence
of
operations
for
solving
a
problem
is
called
a
program.
1.
2. 00
FUNCTIONAL
PARTS
OF
A
COMPUTER
SYSTEM
The
normal
make-up
of a
computer
system
consists
of
five
functional
parts:
1.
Input
4.
Control
of
all
sections
2.
Storage
for
data
and
instructions
5.
Output
3.
Arithmetic
for
actual
computing
These
parts
work
together
to
accept
data
and
instructions
into
the
system,
compute
the
solution
to
the
problem,
and
send
the
solution
back
out
of
the
system.
This
all
takes
place
under
the
direction
of
the
program.
5

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IBM 7090 Specifications

General IconGeneral
CategoryMainframe Computer
Introduced1959
Transistor-basedYes
Word Length36 bits
Add Time4.8 microseconds
MemoryCore memory
Memory (words)32, 768 words