EasyManuals Logo

IBM 7090 User Manual

IBM 7090
190 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #145 background imageLoading...
Page #145 background image
6.
O.
00
IBM
7151
CONSOLE CONTROL UNIT
The
7151
Console
Control
Unit
is
a
separate
unit
that
may
be
placed
at
any
convenient
location
within
certain
cable
length
restrictions.
It
provides
manual
and
semiautomatic
control
over
the
system.
The
console
consists
of
three
panels:
an
operator's
panel
t
a
customer
engineer's
test
panel,
and
a
marginal
check
panel.
With
proper
use,
the
con-
sole
can
be
one of
the
customer
engineer's
most
powerful
tools.
The
time
spent
learning
how
to
use
it
effectively
is
returned
many
times
when
diagnosing
system
errors.
This
section
introduces
the
keys,
lamps,
switches,
and
test
facilities,
their
function,
and
any
associated
logic.
During
the
progress
of a
program
t
the
operator
may
want
some
amount
of
control.
For
example,
at
a
given
point
in
a
calculation,
the
computer
is
given
the
instruction
to
halt.
The
operator
then
can
make
a
visual
check
of
the
information
developed
thus
far
in
the
program.
At
this
point,
one
of
several
alternate
manual
steps
may
be
performed,
depending
on
the
data
observed.
For
this
operation,
the
automatic-manual
switch
is
set
to
MANUAL. With
the
machine
in
this
state,
the
operator
may
enter
and
execute
an
instruction,
interrogate
any
locations
in
storage
for
a
visual
check
of
the
information
stored,
or
load
data
from
the
operator's
panel
keys.
After
the
desired
manipulations
have
been
made,
the
machine
is
returned
to
automatic
status;
the
start
key
is
depressed
and
the
program
continues.
The
start
and
stop
of
the
machine
are
under
control
of
the
master
stop
trigger.
This
trigger
in
turn
controls
"B
cycle
interrupt,
"
which
gates
the
I,
E,
and
L
cycles.
The
keys,
switches,
and
lamps
on
the
console
provide
a
means
to:
1.
Start
or
stop
the
machine
2.
Step
through
a
program
at
reduced
speed
3.
Check
the
status
of
the
CPU
4.
Display
or
revise
the
contents
of
storage
5.
Alter
the
program
In
addition,
the
customer
engineer
has
facilities
for
several
testing
features
which
include:
l.
Auxiliary
start
and
reset
key
2.
1-0
interlocks
3.
Continuous
execution
of
an
instruction
4.
Power
jacks
for
test
equipment
5. B
cycle
control
The
console
(Figure
6.0-1)
is
divided
into
three
sections;
an
operator's
panel,
a
customer
engineer's
test
panel,
and
a
bias
panel.
Figure
6.0-2
designates
system
page
locations
for
the
keys
and
indicators
located
on
the
console.
144

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the IBM 7090 and is the answer not in the manual?

IBM 7090 Specifications

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