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MEMO1830.TXT
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1992-09-25
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╔═════════════════════════════════════════════════════════════════════════╗
║ ║
║ Matched Memory Computer Compatibility: IBM Models 35 -L40SX ║
║ ║
╚═════════════════════════════════════════════════════════════════════════╝
IBM PS/2 MODEL 35SX-040, 043
The PS/2 Model 35SX comes standard with one 2MB memory module on the
system board. These system boards have 3 available memory sockets,
and are expandable to 16MB.
Intel Matched Memory Compatibility:
Module Intel Part IBM Equivalent
Size Number Part Number
1MB PCSM 1170 6450603
2MB PCSM 1270 6450604
2MB PCSM 1275 6450608
4MB PCSM 1455 87F9977 or 34F2933
8MB PCSM 1890 6450129
IBM PS/2 Model 35SX-040 & 043 Memory Configurations
╒═══════╤══════════════════════════════════════╤═════════╕
│System │ Recommended Memory Upgrade Path │Alternate│
│Memory ├────────────┬────────────┬────────────┤Upgrade │
│Desired│ Socket 1 │ Socket 2 │ Socket 3 │Path? │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 2 MB │ * │ │ │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 3 MB │ * │ PCSM 1170 │ │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 4 MB │ * │PCSM 1270** │ │ Note A │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 5 MB │ * │PCSM 1270** │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 6 MB │ * │ PCSM 1455 │ │ Note B │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 7 MB │ * │ PCSM 1455 │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 8 MB │ PCSM 1455 │ PCSM 1455 │ │ Note C │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 9 MB │ PCSM 1455 │ PCSM 1455 │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 10 MB │ PCSM 1455 │ PCSM 1455 │ * │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 11 MB │ PCSM 1890 │ * │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 12 MB │ PCSM 1890 │ PCSM 1455 │ │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 13 MB │ PCSM 1890 │ PCSM 1455 │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 14 MB │ PCSM 1890 │ PCSM 1455 │ * │ │
├───────┼────────────┴────────────┴────────────┴─────────┤
│ 15 MB │ NA │
├───────┼────────────┬────────────┬────────────┬─────────┤
│ 16 MB │ PCSM 1890 │ PCSM 1890 │ │ Note D │
╘═══════╧════════════╧════════════╧════════════╧═════════╛
Configuration Notes:
* Use the standard 2MB memory module supplied with the computer or
PCSM 1270 or PCSM 1275.
** In this specific circumstance the PCSM 1270 and PCSM 1275 can be
used interchangeably.
A An alternate would be to put a PCSM 1170 into sockets 2 and 3 in
addition to the 2MB memory module in socket 1.
B An alternate would be to put either PCSM 1270 or PCSM 1275 in
sockets 2 and 3 in addition to the 2MB memory module in socket 1.
C An alternate would be to put either PCSM 1270 or PCSM 1275 in
sockets 2 and 3 in addition to PCSM 1455 in socket 1.
D An alternate would be to put a PCSM 1455 into sockets 2 and 3 in
addition to the PCSM 1890 in socket 1.
IBM PS/2 MODEL 35LS-14X, 24X
The PS/2 Model 35LS comes standard with one 2MB memory module on the
system board. These system boards have 3 available memory sockets,
and are expandable to 16MB.
Intel Matched Memory Compatibility:
Module Intel Part IBM Equivalent
Size Number Part Number
1MB PCSM 1170 6450603
2MB PCSM 1270 6450604
2MB PCSM 1275 6450608
4MB PCSM 1455 87F9977 or 34F2933
8MB PCSM 1890 6450129
╒═══════╤══════════════════════════════════════╤═════════╕
│System │ Recommended Memory Upgrade Path │Alternate│
│Memory ├────────────┬────────────┬────────────┤Upgrade │
│Desired│ Socket 1 │ Socket 2 │ Socket 3 │Path? │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 2 MB │ * │ │ │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 3 MB │ * │ PCSM 1170 │ │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 4 MB │ * │PCSM 1270** │ │ Note A │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 5 MB │ * │PCSM 1270** │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 6 MB │ * │ PCSM 1455 │ │ Note B │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 7 MB │ * │ PCSM 1455 │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 8 MB │ PCSM 1455 │ PCSM 1455 │ │ Note C │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 9 MB │ PCSM 1455 │ PCSM 1455 │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 10 MB │ PCSM 1455 │ PCSM 1455 │ * │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 11 MB │ PCSM 1890 │ * │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 12 MB │ PCSM 1890 │ PCSM 1455 │ │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 13 MB │ PCSM 1890 │ PCSM 1455 │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 14 MB │ PCSM 1890 │ PCSM 1455 │ * │ │
├───────┼────────────┴────────────┴────────────┴─────────┤
│ 15 MB │ NA │
├───────┼────────────┬────────────┬────────────┬─────────┤
│ 16 MB │ PCSM 1890 │ PCSM 1890 │ │ Note D │
╘═══════╧════════════╧════════════╧════════════╧═════════╛
Configuration Notes:
* Use the standard 2MB memory module supplied with the computer or
PCSM 1270 or PCSM 1275.
** In this specific circumstance the PCSM 1270 and PCSM 1275 can be
used interchangeably.
A An alternate would be to put a PCSM 1170 into sockets 2 and 3 in
addition to the 2MB memory module in socket 1.
B An alternate would be to put either PCSM 1270 or PCSM 1275 in
sockets 2 and 3 in addition to the 2MB memory module in socket 1.
C An alternate would be to put either PCSM 1270 or PCSM 1275 in
sockets 2 and 3 in addition to PCSM 1455 in socket 1.
D An alternate would be to put a PCSM 1455 into sockets 2 and 3 in
addition to the PCSM 1890 in socket 1.
IBM PS/2 MODEL 40SX-040, 043, 045
The PS/2 Model 40SX comes standard with one 2MB memory module on the
system board. These system boards have 3 available memory sockets,
and are expandable to 16MB.
Intel Matched Memory Compatibility:
Module Intel Part IBM Equivalent
Size Number Part Number
1MB PCSM 1170 6450603
2MB PCSM 1270 6450604
2MB PCSM 1275 6450608
4MB PCSM 1455 87F9977 or 34F2933
8MB PCSM 1890 6450129
╒═══════╤══════════════════════════════════════╤═════════╕
│System │ Recommended Memory Upgrade Path │Alternate│
│Memory ├────────────┬────────────┬────────────┤Upgrade │
│Desired│ Socket 1 │ Socket 2 │ Socket 3 │Path? │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 2 MB │ * │ │ │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 3 MB │ * │ PCSM 1170 │ │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 4 MB │ * │PCSM 1270** │ │ Note A │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 5 MB │ * │PCSM 1270** │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 6 MB │ * │ PCSM 1455 │ │ Note B │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 7 MB │ * │ PCSM 1455 │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 8 MB │ PCSM 1455 │ PCSM 1455 │ │ Note C │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 9 MB │ PCSM 1455 │ PCSM 1455 │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 10 MB │ PCSM 1455 │ PCSM 1455 │ * │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 11 MB │ PCSM 1890 │ * │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 12 MB │ PCSM 1890 │ PCSM 1455 │ │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 13 MB │ PCSM 1890 │ PCSM 1455 │ PCSM 1170 │ │
├───────┼────────────┼────────────┼────────────┼─────────┤
│ 14 MB │ PCSM 1890 │ PCSM 1455 │ * │ │
├───────┼────────────┴────────────┴────────────┴─────────┤
│ 15 MB │ NA │
├───────┼────────────┬────────────┬────────────┬─────────┤
│ 16 MB │ PCSM 1890 │ PCSM 1890 │ │ Note D │
╘═══════╧════════════╧════════════╧════════════╧═════════╛
Configuration Notes:
* Use the standard 2MB memory module supplied with the computer or
PCSM 1270 or PCSM 1275.
** In this specific circumstance the PCSM 1270 and PCSM 1275 can be
used interchangeably.
A An alternate would be to put a PCSM 1170 into sockets 2 and 3 in
addition to the 2MB memory module in socket 1.
B An alternate would be to put either PCSM 1270 or PCSM 1275 in
sockets 2 and 3 in addition to the 2MB memory module in socket 1.
C An alternate would be to put either PCSM 1270 or PCSM 1275 in
slots 2 and 3 in addition to PCSM 1455 in socket 1.
D An alternate would be to put a PCSM 1455 into sockets 2 and 3 in
addition to the PCSM 1890 in socket 1.
IBM PS/2 MODEL L40SX
The PS/2 Model L40SX comes standard with 2MB memory built onto the
system board. These system boards have 2 available memory sockets,
and are expandable to 18MB.
Intel Matched Memory Compatibility:
Module Intel Part IBM Equivalent
Size Number Part Number
2MB LTSM 1240 79F0999
4MB LTSM 1440 79F1000
8MB LTSM 1840 79F1001
╒═══════╤═════════════════════════╤═════════╕
│System │ Recommended Upgrade Path│Alternate│
│Memory ├────────────┬────────────┤Upgrade │
│Desired│ Socket 1 │ Socket 2 │Path? │
├───────┼────────────┴────────────┴─────────┤
│ 2 MB │ Standard (on system board) │
├───────┼───────────────────────────────────┤
│ 3 MB │ NA │
├───────┼────────────┬────────────┬─────────┤
│ 4 MB │ LTSM 1240 │ │ │
├───────┼────────────┴────────────┴─────────┤
│ 5 MB │ │
├───────┼────────────┬────────────┬─────────┤
│ 6 MB │ LTSM 1440 │ │ Note A │
├───────┼────────────┴────────────┴─────────┤
│ 7 MB │ NA │
├───────┼────────────┬────────────┬─────────┤
│ 8 MB │ LTSM 1440 │ LTSM 1240 │ │
├───────┼────────────┴────────────┴─────────┤
│ 9 MB │ NA │
├───────┼────────────┬────────────┬─────────┤
│ 10 MB │ LTSM 1840 │ │ Note B │
├───────┼────────────┴────────────┴─────────┤
│ 11 MB │ NA │
├───────┼────────────┬────────────┬─────────┤
│ 12 MB │ LTSM 1840 │ LTSM 1240 │ │
├───────┼────────────┴────────────┴─────────┤
│ 13 MB │ NA │
├───────┼────────────┬────────────┬─────────┤
│ 14 MB │ LTSM 1840 │ LTSM 1440 │ │
├───────┼────────────┴────────────┴─────────┤
│15,16,17MB NA │
├───────┼────────────┬────────────┬─────────┤
│ 18 MB │ LTSM 1840 │ LTSM 1840 │ │
╘═══════╧════════════╧════════════╧═════════╛
Configuration Notes:
A An alternate would be to put a LTSM 1240 into both sockets 1 and
2.
B An alternate would be to put a LTSM 1440 into both sockets 1 and
2.
Installing into the L40SX
The Memory Module connectors are located under the L40SX Keyboard,
therefore some disassembly is required when adding more memory:
Before you install more memory into an IBM PS/2 Model L40SX you will
need the following tools and materials:
» Your laptop computer manual
» The latest reference diskette for you laptop computer
» A small Phillips screwdriver with a non-magnetic tip
» A small flat-blade screwdriver win non-magnetic tip
Installation instructions:
1. Insert your reference diskette into drive a: and boot your
computer. Select the "test computer" entry on the main menu. This
will verify that your computer is running correctly.
2. Turn off the computer and all attached devices and disconnect
them from the computer. Remove the rechargeable battery from the
back of the computer.
3. Close the display if it is open. Thne on a flat work surface,
turn the computer over and lay it on its top.
4. Locate and remove the three screw covers on the bottom of the
computer. These are along the front edge of the computer near the
buttons used to open the diskplay. Use the flat-blade screwdriver
to lift off the screw covers. Save the screw covers to reinsert
later.
5. Using the small Phillips screwdriver, remove the three screws
that were under the screw covers that were removed in the
previous step.
6. Carefully grasp both the top and bottom of both sides of the
computer and turn it back over. Place the computer back on the
work surface right side up.
7. Open the display (as you would for normal operation). Remove the
keyboard by:
»Lifting the front edge of the keyboard until it clears the
case.
»Sliding the keyboard forward until the back edge clears the
retaining lip on the rear of the case.
8. Carefully lift the keyboard out and flip it over so the keys are
face down on the work surface.
9. You can now see the two memory expansion slots in your computer.
Follow the guidelines listed below to determine which slot(s) to
use:
8MB Memory Modules: Place the first 8MB memory module in slot 2.
This is true when installing a single 8MB memory module or any
combination of an 8MB memory module and other sizes.
4MB Memory Modules: Place a single 4MB memory module in
slot 2. If you intend to use both an 8MB module and a 4MB
module, place the 8MB module in slot 2. NOTE: You cannot
install two 4MB memory modules.
2MB Memory Modules: Place a single 2MB memory module in slot 1.
10. Your memory module has a notch on one end near the gold-colored
connectors. Hold the module so the notch is on your left. Insert
the memory module into the socket. Push back on the module,
applying equal pressure to both ends, to lock the module into
place. Make sure the locking tabs on the socket are fully
engaged. (You should hear a click when it locks into place.)
11. Reassemble the computer. Make sure the back edge of the keyboard
is positioned under the retaining lip. Carefully grasp both the
top and bottom of both sides of the computer and turn it over.
Replace the three screws and screw covers. Turn the computer back
over. Plug in the power cord or battery pack.
12. Insert your reference diskette into drive A: and turn on your
computer. Run Automatic Configure to recognize the new memory.
══════════════════════════════════════════════════════════════════════════════
End of file Intel FaxBack # 1830 September 25,1992