AT&T 3B2 Series User manual
AT&T
305-53~
Issue 3
AT&T
382
Computer
Random Access Memory
Expansion Manual
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------ -- - -- - -- - - -
NOTICE
The information in this
document
is subject
to
change
without
notice. AT&T assumes
no
responsibility
for
any
errors
that
may
appear in this document.
Copyrightc
1986
AT&T
All Rights Reserved
Printed in U.S.A
•
•
•
ORDERING
INFORMATION
Additional copies
of
this
document
can be
ordered
by
calling
1-800-432-6600
Inside
the
U.S.A.
1-800-255-1242
Inside Canada
OR
1-317-352-8557
Outside
the
U.S.A.
OR by
writing
to:
AT&T
Customer
Information
Center
(CIC)
Attn:
Customer
Service Representative
P.O. Box 19901
Indianapolis, IN
46219
•
•
•
CONTENTS
Chapter
1.
INTRODUCTION
Chapter
2. INSTALLATION AND REMOVAL
IN
A 4-SLOT
382
COMPUTER
Chapter
3. INSTALLATION AND REMOVAL
IN
A
12-SLOT
382
COMPUTER
Chapter
4. TESTING AND TROUBLESHOOTING
•
•
•
Chapter 1
INTRODUCTION
PAGE
FEATURE DESCRIPTION . . . • . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
4-Slot
382
Computer
Memory
Configurations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
12-Slot
382
Computer
Memory
Configurations
. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
CONVENTIONS . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
MANUAL
ORGANIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5
UNPACKING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
IMPORTANT REMINDERS . . • . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
General . . . • • . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Safety . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Hardware
. . • • . . . • . . . • . . . • . . . • . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-8
•
•
•
Chapter 1
INTRODUCTION
This
manual
describes
the
Random Access
Memory
(RAM) Expansion
feature
of
your
AT&T
382
Computer.
Little
computer
related
experience
is
needed
to
install
or
remove
the
memory
cards.
The
RAM
Expansion
feature
cards
are
designed
for
use in all
382
Computers.
The
operation
of
the
RAM
cards
is
identical
for
all
382
Computers,
but
the
installation
and
removal
procedures
for
RAM
cards
are
different.
Therefore,
the
installation
and
removal
procedures
for
382
Computers
equipped
with
four
backplane
slots
(4-slot
382)
are in
Chapter
2, and
the
installation
and
removal
procedures
for
382
Computers
equipped
with
twelve
backplane
slots (
12-slot
382)
are
in
Chapter
3.
FEATURE DESCRIPTION
The
RAM
expansion
feature
is
an
optional
382
Computer
add-on
feature
that
provides
additional
main
memory.
Adding main
memory
improves
the
efficiency
and
power
of
your
computer.
This
feature
consists only
of
382
Computer
hardware.
There
are
no
additional
command~
or
software
included.
1-1
INTRODUCTION
In
order
for
you
to
take
full advantage
of
the
RAM
installed in
your
382
Computer,
the
tunable
parameter
"N8UF"
must
be set
for
the
particular
amount
of
RAM
in
your
computer.
This
parameter
will
automatically
be
reset
to
a specified
default
value when you
perform
the
installation
or
removal
procedure.
Information
on manually
setting
tunable
parameters
is given in
the
382
Computer
System
Administration
documentation.
4-Slot
382
Computer Memory Configurations
The
4-slot
382
Computers
have five possible
configurations
of
main
memory:
•
5I2
kilobytes -
which
can be obtained by using
two
256-kilobyte
memory
cards in
the
computer.
5I2
kilobytes is
the
minimum
amount
of
memory
provided
in a
4-slot
382
Computer.
• I
megabyte
-
which
can be obtained by using one
I-megabyte
memory
card
in
the
computer.
• 2
megabytes
-
which
can be
obtained
by using
two
I-megabyte
memory
cards
OR
one
2-megabyte
memory
card in
the
computer.
• 3
megabytes
-
which
can be
obtained
by using one
2-megabyte
memory
card
and one
I-megabyte
memory
card in
the
computer.
• 4
megabytes
-
which
can be
obtained
by using
two
2-megabyte
memory
cards in
the
computer.
Note: A
256-kilobyte
memory
card and a
I-megabyte
or
2-megabyte
memory
card
cannot be used
together
in any
382
Computer.
These are
the
only
combinations
that
are available.
There
are
no
provisions
for
further
memory
growth
in a 4-slot
382
Computer.
I-2
•
•
•
INTRODUCTION
12-Slot
382
Computer Memory Configurations
The
12-slot
382
Computer
has
four
possible
configurations
of
main
memory:
• 1
megabyte
-
which
can be
obtained
by using one
1-megabyte
memory
card
in
the
computer.
1
megabyte
is
the
minimum
amount
of
memory
provided
in a
12-slot
382
Computer.
• 2
megabytes
-
which
can be
obtained
by
using
two
1-megabyte
memory
cards
or
one
2-megabyte
memory
card
in
the
computer
.
• 3
megabytes
-
which
can be
obtained
by
using one
1-megabyte
memory
card
and
one
2-megabyte
memory
card
in
the
computer.
• 4
megabytes
-
which
can be
obtained
by using
two
2-megabyte
memory
cards
in
the
computer
.
Note:
256-kilobyte
memory
cards
cannot be installed in
the
12-slot
382
Computer
or
the
computer
will
not
operate
properly.
These are
the
only
combinations
that
are
available.
There
are no
provisions
for
further
memory
growth
in a
12-slot
382
Computer
.
1-3
INTRODUCTION
CONVENTIONS
This
document
contains
sample
displays
which
will
help
you
understand
described
procedures.
The
sample
displays in
this
document
and
the
displays
on
your
terminal
screen
may
differ
slightly
due
to
improvements
in
the
product
after
this
document
was finalized.
Therefore,
use
the
displays
in
this
document
as
samples
of
the
type
of
data
available.
However,
the
data
displayed on
your
terminal
screen
accurately
reflects
the
software
on
your
computer.
The
following
conventions
are used
to
show
your
terminal
input
and
the
system
output.
1-4
This
style
of
type
is
used
to
show
system
generated
responses
displayed
on
your
screen.
This
style
of
bold
type
is
used
to
show
inputs
entered
from
your
keyboard
that
are
displayed
on
your
screen.
These
bracket
symbols,
< >
identify
inputs
from
the
keyboard
that
are
not
displayed
on
your
screen,
such
as:
<CR>
carriage
return,
<CTRL
d>
control
d,
<ESC
g>
escape
g,
passwords,
and
tabs.
This style
of
italic type
is
used
for
notes that
provide you with additional information.
Note:
Throughout
this
document,
the
terms
"4-slot
382"
and
"12-slot
382"
are
used.
The
term
"4-slot
382"
refers
to
a
382
Computer
that
is
equipped
with
four
backplane
slots
(382/300
and
382/310
Computers).
The
term
"12-slot
382"
refers
to
a
382
Computer
that
is
equipped
with
12
backplane
slots
(382/
400
Computer).
•
•
•
INTRODUCTION
MANUAL ORGANIZATION
The
remainder
of
this
feature
manual
is divided
into
the
following
chapters:
•
Chapter
2, "INSTALLATION AND REMOVAL
IN
A 4-SLOT
382
COMPUTER,"
describes
how
to
install
or
remove
memory
cards
in a
4-slot
382
Computer.
•
Chapter
3, "INSTALLATION AND REMOVAL
IN
A 12-SLOT
382
COMPUTER,"
describes
how
to
install
or
remove
memory
cards
in a
12-slot
382
Computer.
•
Chapter
4, "TESTING AND TROUBLESHOOTING,"
describes
how
to
clear
trouble
you
may
have
with
your
memory
cards.
Refer
to
your
appropriate
AT&T
382
Computer
Owner
/Operator
Manual
for
a
glossary
of
abbreviations
and
terms
also used in
this
manual.
UNPACKING INSTRUCTIONS
If
you
have
not
already
done
so,
inspect
the
shipping
container
for
signs
of
damage
before
unpacking
the
memory
card(s).
If
any
damage
is
suspected,
notify
the
shipper
immediately.
The
shipper
may
suggest
that
you
unpack
the
container
and
check
its
contents
for
damage. Keep in
mind
that
even
though
damage
to
the
contents
may
not
be obvious,
some
internal
damage
may
have
occurred.
The
following
steps
describe
how
to
properly
unpack
and visually
inspect
your
memory
card(s).
1.
Carefully
remove
the
contents
of
the
shipping
container
.
2.
Check
the
contents
of
the
shipping
container
against
the
packing
invoice
to
ensure
that
no
items
are
missing. The
following
items
should
be
present
in
the
shipping
container.
1-5
INTRODUCTION
• The
proper
number
of
RAM
cards
• One
AT&T
382
Computer
Random
Access
Memory
Expansion
Manual.
Caution: While handling a
memory
card, do
not
wear any
metal
rings,
and
always hold a card by the
edges-like
a
record album. The components on the
memory
card are
sensitive to static discharge and could be damaged
if
not
handled carefully.
3.
Carefully
remove
the
protective
packing
from
around
your
memory
card(s).
The
contacts
have been cleaned and
lubricated
by
the
manufacturer
and should
not
require
additional
cleaning.
4.
Inspect
each card
for
damage
that
may
have
occurred
during
shipment
(loose
components,
cracks,
etc).
If any
damage
occurred,
immediately
notify
the
shipper
and
either
your
AT&T Service
Representative
or
authorized
dealer.
5.
Verify
that
the
memory
card(s)
you
received
is
what
you
ordered
by
checking
the
identification
number
on
the
back
side
of
the
card.
1-6
The possible
locations
for
the
identification
number
are
shown in
Figure 1-1.
• The
256-kilobyte
memory
cards
are
stamped
191A.
(Location
A
of
Figure 1-1.)
• The
I-megabyte
memory
cards
are
stamped
191
B.
(Location
A
of
Figure
1-1.)
• The
2-megabyte
memory
cards
for
the
12-slot
382
are
stamped
1928.
(Location
A
of
Figure 1-1.)
•
•
•
INTRODUCTION
• The
2-megabyte
memory
cards
for
the
4-slot
or
12-slot
382
are
stamped
CM 191
D.
(Location
B
of
Figure 1-1.) These
cards
have
components
mounted
on
both
sides
of
the
circuit
board.
IOENTIFICA
TION
NUMBER
LOCATIONS
B
Figure 1-1. Location of Memory Card Identification Number
Check
your
receipt
to
make
sure
the
correct
card
was
ordered.
If
there
is a
problem,
contact
your
AT&T Service Representative
or
authorized
dealer.
6. Save
the
packing
material
in case
the
memory
card(s)
must
be
repacked
in
the
future
.
1-7
INTRODUCTION
IMPORTANT REMINDERS
General
1.
Be
familiar
with
your
appropriate
AT&T
382
Computer
Owner
/Operator
Manual and
this
manual
BEFORE
installing
this
feature.
2.
Keep
this
manual
handy
in
your
computer
library.
Store
it
with
your
other
soft-cover
feature
manuals in
your
Options binder.
Safety
1.
Be
alert
for
sharp
edges when
handling
hardware.
2. Always
follow
the
prescribed
powerdown
procedures
and unplug
your
3B2
Computer
before
removing
the
cover.
3. Follow
instructions
carefully
to
avoid personal
injury
or
equipment
damage.
Hardware
1.
Protect
your
feature
hardware
from:
Sunlight
Heat
Cold
Static
Electricity
Chemicals
Breakage
Grime
2. Do
not
disturb
other
3B2
Computer
hardware.
3. Use
tools
in
the
proper
manner.
1-8
•
Chapter
2
INSTALLATION
AND
REMOVAL
IN
A 4-SLOT
382
COMPUTER
PAGE
HARDWARE REQUIREMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
SOFTWARE REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
PREPARATION . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
HARDWARE INSTALLATION AND REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
SOFTWARE INSTALLATION AND REMOVAL • . . . . • . • • • • . . . . . . . . . • . . . . . . . . . . . . .
2-12
•
•
•
•
•
Chapter 2
INSTALLATION AND REMOVAL IN A
4-SLOT
382
COMPUTER
This
chapter
provides
instructions
on
how
to
install and
remove
Random
Access
Memory
(RAM) expansion
feature
cards
in
your
4-slot
382
Computer
(382/300
or
382/310
Computer).
HARDWARE
REQUIREMENTS
256-kilobyte,
1-megabyte,
and
2-megabyte
RAM
cards
may
be used in a
4-slot
382
Computer.
However,
the
256-kilobyte
memory
card
cannot
be
installed in
the
computer
with
a
1-megabyte
or
2-megabyte
card. Detailed
information
on allowable
RAM
card
combinations
is
given
later
in
this
chapter
.
2-1
INSTALLATION AND REMOVAL IN A 4-SLOT
382
COMPUTER
SOFTWARE REQUIREMENTS
The
only
software
requirement
is
that
the
tunable
parameter
"NBUF"
must
be
reconfigured
whenever
the
amount
of
RAM in
the
computer
is
changed.
The
hardware
installation
and
removal
instructions
include
steps
that
will cause
the
computer
to
automatically
reconfigure
this
parameter.
However,
to
get
the
greatest
efficiency
from
your
RAM cards,
some
tunable
parameters
should
be
changed
to
their
recommended
values. See
your
382
Computer
System
Administration
documentation
for
information
on
setting
tunable
parameters.
PREPARATION
Estimated
time
for
installation
is
between
15
and
30
minutes.
If
the
RAM
card(s)
was
installed
for
you,
only
perform
Steps 1 and 2 in
the
"HARDWARE INSTALLATION AND REMOVAL"
procedure.
Then
power
up
the
computer
according
to
your
AT&T
382
Computer
Owner
/Operator
Manual.
Before
installing
or
removing
any
hardware,
do
the
following:
•
Obtain
a small
flathead
screwdriver
.
• Have
your
AT&T
382
Computer
Owner
/Operator
Manual
handy.
• Review
the
"IMPORTANT
REMINDERS" discussed in
Chapter
1.
If
you
follow
each
step
carefully,
installing
or
removing
RAM
cards
will be
relatively
easy. Read
the
appropriate
installation
and
removal
procedure,
and
make
sure
you
understand
each
step
before
you
begin.
2-2
•
•
•
INSTALLATION AND REMOVAL
IN
A 4-SLOT
382
COMPUTER
HARDWARE
INSTALLATION
AND
REMOVAL
RAM
cards
are
designed
so
they
are
easy
to
install
or
remove.
If
you
have
any
trouble
installing
or
removing
a
card,
do not force it.
Whenever
you
insert
a RAM
card,
make
sure
that
you
position
the
card
as
described
in
this
chapter
and
that
you
are
inserting
it
into
the
proper
connector.
Warning:
It
is
possible to install a
RAM
card backwards. Installing
a
RAM
card backwards
and
applying
power
MAY
permanently
damage the
card
or
prevent
the
computer
from
powering up.
If
you
are uncertain
about
any
part
of
the installation procedure, do
not
attempt
to install the
RAM
card(s}. Contact
your
AT&T
Service Representative
or
authorized
dealer.
The
contacts
of
your
new
RAM
card(s)
have been
cleaned
and
lubricated
by
the
manufacturer.
Do
not
clean
the
contacts
before
installing
the
RAM
card.
Every
time
the
amount
of
RAM in
your
382
Computer
is
changed
(increased
or
decreased),
the
value
of
the
tunable
parameter
"N8UF"
must
be
reset.
Otherwise,
the
system
could
panic.
Therefore,
it
is
recommended
that
you
execute
the
following
procedures
exactly
as
described
.whenever
the
amount
of
RAM is
changed
.
2-3
INSTALLATION AND REMOVAL
IN
A 4-SLOT
382
COMPUTER
When
you
install
or
remove
RAM
cards
in
your
4-slot
382
Computer,
perform
the
following
steps:
1. With
the
382
Computer
on, log on
at
the
console
as root and
perform
either
Step
a
or
b:
2-4
a.
If
you
are
installing
RAM
cards
in a
382/300
Computer,
enter
the
following
commands:
touch
/etc/system<CR>
shutdown
-y
-g90
-iO<CR>
The
computer
will
shut
down
with
a
90-second
grace
period,
and
tunable
parameters
associated
with
RAM will be
automatically
reconfigured
when
the
computer
is
powered
up.
b.
If
you
are
installing
RAM
cards
in a
382/310
Computer,
shut
-
down
your
computer
according
to
the
procedure
given in
the
AT&T
382
Computer
Owner
/Operator
Manual.
Caution:
Never
pull
the
power
plug
or
externally remove
power
until
the
382
Computer
has
completed
its shutdown
sequence. Data could be
permanently
lost
if
the
computer
is
not
shut down properly.
•
•
INSTALLATION AND REMOVAL
IN
A 4-SLOT
382
COMPUTER
2. Wait
for
the
computer
to
complete
its
shutdown
sequence. The
broadcast
message will end
with
"The
system
is
down",
and
the
POWER
indicator
will
turn
off.
3. Unplug
the
power
cord.
4. Remove
the
cable access
door.
To
remove,
release
the
latch,
lift
the
door,
and pull up. See Figure 2-1.
ft®
PULL
J<g
ROTATE
UP
~0
LATCH
0 0
Figure 2-1. Removing Cable
Access
Door
5.
Remove
the
four
screws holding
the
computer
cover.
6. Remove
the
computer
cover
.
2-5
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