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EK-PELAM-IC-C01

May 2000

12 pages

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Document:	DEC 3000 Model 300 Series AXP Adding Memory
Order Number:	EK-PELAM-IC
Revision:	C01
Pages:	12
Original Filename:	https://web-docs.gsi.de/~kraemer/COLLECTION/DEC/pelamicc.pdf

OCR Text

DEC 3000 Model
300 Series AXP

Adding Memory

Part Number: EK–PELAM–IC. C01

Introduction
Your DEC 3000 Model 300 series AXP system is
configured at the factory with 32 to 256 megabytes
of memory, depending on the configuration you ordered.
Memory can be ordered as:
a. A pair of 8-megabyte modules, part number
MS16-BA
b. A pair of 32-megabyte modules, part number
MS16-DA
A memory module is also known as a single inline
memory module (SIMM).

Adding Memory Using 8-Megabyte SIMMs
To increase your system’s memory capacity from a
minimum of 32 megabytes to 48 or 64 megabytes,
add two or four 8-megabyte SIMMs. The SIMMs
are identified by counting ten chips on the top
row 1 and four chips on the bottom row 2 ; 14
chips on one side of the module but only 10 chips
on the other side of the module. Note the 8 megabyte chips on the top row are smaller than the
32-megabyte chips (shown on next panel).
1

2
MLO-010945

Note: This card provides you with the necessary
installation instructions for adding memory to your
system.

Introduction (Cont.)
Adding Memory Using 32-Megabyte SIMMs
To increase your system’s memory capacity from a
minimum of 64 megabytes to 128 or 256 megabytes, add two or six 32-megabyte SIMMs. The
SIMMs are identified by counting eight chips on
top row 3 and four chips on the bottom row 4 ;
12 chips on each side of the module. Note the
32-megabyte chips on the top row are larger than
the chips on the 8-megabyte module.
3

4
MLO-010946

Important:
Eight and 32-megabyte modules may be mixed, but
specific configuration rules apply. See panel 5 for
instructions.

Two Methods of Adding Memory
There are two methods for adding memory to your
system.
a. You can add the memory yourself.
b. You can contract with your Digital service representative to add the memory.
If you choose to add the memory yourself, allow
about 15 minutes from start to finish.
Refer to the DEC 3000 Model 300 Series AXP
Hardware Reference Guide, part number
EK-PELCN-OG, for more information.

1. Preparing Your System
a. Back up your system files.
b. Shut down all software following the instructions in your software documentation.
c. At the console prompt (>>>), enter this
command:
>>> show mem
d. Record the number of megabytes. (See the
following sample display line.)
DEC 3000 - M300 Memory: 32 Mbytes

e. At the console prompt (>>>), enter this
command:
>>> set auto_action halt
f.

Turn off (O) the monitor and all peripheral devices (printers, modems, and expansion boxes).

g. Turn off (O) the system unit.

WARNING: After you turn off the system unit
and before you unplug the power cord, wait about
one minute before opening the system unit. This
allows time for the power supply capacitors to
safely discharge.

Before opening the system unit:
•

Disconnect the monitor and system power
cords from the back of the system unit.

•

Disconnect the monitor video cable,
mouse/keyboard cable, and any network cables.

•

Remove the monitor from the top of the system
unit so that you can remove the system unit
cover. Two people are required to move the
monitor.

2. Opening the System Unit
a. Remove the two Phillips screws 1 on the right
and left back corners of the system unit cover.
b. Place the system unit so that the back of the
unit extends over the edge of your table or
desk.
c. Place your thumbs 2 on top of the two black
rubber caps on the back of the system unit, and
at the same time, place your fingers under the
cover’s bottom edge. Press down with your
thumbs, and at the same time, pull up with your
fingers to raise the cover.
d. Pivot the cover on the tabs that run along the
system unit’s front edge.
e. Pull the system unit cover up and away until it
releases from the tabs.
f.

Place the cover aside.

ISD

MLO-010600

3. Attaching an Antistatic Wrist Strap
CAUTION: To avoid static discharge, do not
touch anything inside the system unit until you put
on the antistatic wrist strap that was shipped with
your system.
Follow the instructions on the envelope that contains the wrist strap. Store the strap after using it.

MLO-010098

4. Locating the SIMMs
Important: When adding SIMMs, you must remember to add the modules so that they occupy
consecutive connector positions.
SIMMs are added to the system module starting at
slot 0 1 . Note the number and position of each
slot in the detailed section of the illustration 2 .

S
lo
t
0
1
2
3
4
5

6
7

MLO-010948

Strict configuration rules must be followed when
you mix 8- and 32-megabyte SIMMs in the same
system. See panel 5 for instructions.

Note: If you remove a SIMM, you must
comply with the configuration rules. See your
DEC 3000 Model 300 Series AXP Hardware
Reference Guide, part number
EK-PELCN-OG, for removal instructions.

5. Mixing 8- and 32-Megabyte SIMMs
Configuration Rules
a. When mixing 8- and 32-megabyte SIMMs, always add the 32-megabyte SIMMs first.
b. Add 32-megabyte SIMMs in pairs, 64 to 256
megabytes in total.
c. Add 8-megabyte SIMMs in pairs, 16 to 64
megabytes in total.
d. Always add SIMMs in pairs, no individual
modules.
e. Add SIMMs starting at slot 0.
f.

No empty slots between pairs of SIMMs.

Example: For a system that requires 160 megabytes of memory, use the following:
MS16-DA

Slot
0

MS16-DA

MS16-BA

7
MLO-010947

Add one 32-megabyte SIMM to slots 0, 1, 2 and 3;
a total of 128 megabytes of memory in these slots.
Add one 8-megabyte SIMM to slots 4, 5, 6, and 7;
a total of 32 megabytes of memory in these slots.
Total system memory = 160 megabytes.

6. Adding New SIMMs
Always handle SIMMs by their edges to avoid electrostatic damage and contamination of the module
pins and connectors. Note that it may be necessary
for you to remove a device before you add the last
SIMM.
To add a new SIMM:
a. Hold the SIMM at an angle, notch end 1 away
from the power supply, and the module pins
facing down toward the slot on the system
module.
b. Firmly push the module at an angle into the
connector, then stand the module upright 2 .
c. Make sure that the SIMM snaps into the metal
retainers at each end of the connector 3 .
d. Continue adding modules, filling available connector slots in succession.

2
MLO-010601

7. Replacing the System Unit Cover
Firmly seat all SIMMs. If a SIMM does not make
proper contact with the system module, your system cannot detect it.
To replace the cover, follow these steps:
a. Position the cover so that the lip on the front inside edge 1 fits over the four tabs 2 along
the front edge of the system unit.
b. Maintain a slight pressure on the front of the
cover 3 as you lower it. Make sure the sides
of the cover fit over the outside of the bottom
enclosure.
c. Press down firmly on the edges of the cover.
d. Replace the two screws that hold the system
unit cover in place 4 .

ISDN

4
MLO-010602

8. Reconnecting Your System
Return your monitor to its former position. Connect the following components:
a. Monitor and system power cords to the system
unit.
b. Monitor video and mouse/keyboard cables.
c. Network cable and optional adapter.
d. System power cord to a grounded outlet.
Turn on ( | ) the following components:
a. Peripheral devices, such as a printer, modem,
or expansion box.
b. System unit and monitor.

ISDN

MLO-010603

9. Restarting Your System
To verify that the installation of additional memory
was successful, enter the following command:
>>> show mem

Status information identifying the bank number,
memory size per bank, and the starting address of
each bank is displayed. In the following example,
32-megabyte modules occupy slots 0, 1, 2 and 3;
8-megabyte modules occupy slots 4, 5, 6 and 7 for
a total of 160 megabytes of memory.
DEC 3000 - M300 Memory: 160 Mbytes
Bank #

Memory Size

Start_Address

0
1
2
3
4
5
6
7

032 Mbytes
032 Mbytes
032 Mbytes
032 Mbytes
008 Mbytes
008 Mbytes
008 Mbytes
008 Mbytes

0x00000000
0x02000000
0x04000000
0x06000000
0x08000000
0x08800000
0x09000000
0x09800000

At the console prompt (>>>), enter the following
command:
>>> set auto_action boot

If your system has OpenVMS AXP or DEC OSF/1
AXP operating system software already installed,
enter B at the console prompt (>>>) and press the
Return key. Your system automatically starts. If no
operating system software is installed, refer to your
software documentation.
For a listing of all console commands (with examples), refer to the DEC 3000 Model 300 Series AXP
Reference Guide, part number EK-PELCN-OG.
© Digital Equipment Corporation 1994 All rights reserved.
Printed in U.S.A.
S2444