4100 MT (250-5160) Adding Memory Faxback Doc. # 2775
Warning: This CPU does not support 8 MB SIMMS. This CPU does not
support double sided SIMMS.
NOTE: The 32 bit SIMMS for this CPU are available through Third Party
Products. The 4 MB (1x32) SIMM Kit can be ordered under
Catalog #. 250-5138.
To add system memory, follow these steps:
1. Turn the computer off, unplug the power and phone cords,
disconnect all peripheral devices, remove the system-unit-cover,
and move the internal drive bay.
2. For better access to the SIMM sockets, remove the power supply:
Use a Phillips screwdriver to remove the four power supply screws
on the back of the computer. Pull the power supply out and place
it next to the chassis.
Note: To prevent the power supply from dropping onto the system board,
hold it with one hand while removing the screws.
3. Select the sockets into which you will insert the SIMMs. Fill
sockets in sequence; for instance, fill socket 0 before socket 1.
Total Memory Socket 0 Socket 1 Socket 2 Socket 3
1 MB 1-MB Empty Empty Empty
2 MB 1-MB 1-MB Empty Empty
3 MB 1-MB 1-MB 1-MB Empty
4 MB 1-MB 1-MB 1-MB 1-MB
4 MB 4-MB Empty Empty Empty
5 MB 4-MB 1-MB Empty Empty
6 MB 4-MB 1-MB 1-MB Empty
7 MB 4-MB 1-MB 1-MB 1-MB
8 MB 4-MB 4-MB Empty Empty
9 MB 4-MB 4-MB 1-MB Empty
10 MB 4-MB 4-MB 1-MB 1-MB
12 MB 4-MB 4-MB 4-MB Empty
13 MB 4-MB 4-MB 4-MB 1-MB
16 MB 4-MB 4-MB 4-MB 4-MB
16 MB 16-MB Empty Empty Empty
17 MB 16-MB 1-MB Empty Empty
18 MB 16-MB 1-MB 1-MB Empty
19 MB 16-MB 1-MB 1-MB 1-MB
20 MB 16-MB 4-MB Empty Empty - Not Supported
21 MB 16-MB 4-MB 1-MB Empty
22 MB 16-MB 4-MB 1-MB 1-MB
24 MB 16-MB 4-MB 4-MB Empty
25 MB 16-MB 4-MB 4-MB 1-MB
28 MB 16-MB 4-MB 4-MB 4-MB
32 MB 16-MB 16-MB Empty Empty
33 MB 16-MB 16-MB 1-MB Empty
34 MB 16-MB 16-MB 1-MB 1-MB
36 MB 16-MB 16-MB 4-MB Empty
37 MB 16-MB 16-MB 4-MB 1-MB
40 MB 16-MB 16-MB 4-MB 4-MB - Not Supported
48 MB 16-MB 16-MB 16-MB Empty
49 MB 16-MB 16-MB 16-MB 1-MB
52 MB 16-MB 16-MB 16-MB 4-MB
64 MB 16-MB 16-MB 16-MB 16-MB
Note: Use only memory upgrade kits from your Radio Shack store or
participating dealer. Only 70-ns or faster, 32-bit SIMMs should
be used. Other memory upgrades might not work correctly in your
computer.
4. Remove SIMMs if necessary. You cannot remove a SIMM without
first removing any SIMMs located below it. To remove a SIMM,
carefully pull the plastic retaining clips sideways and push
the SIMM down slightly. Pull the SIMM out of the socket; be
careful to avoid damage.
5. When installing SIMMs, insert the SIMM in the highest empty
socket first. Carefully push the SIMM into the socket until
it is fully seated. The easiest method may be to push in the
right side of the SIMM first and then the left side. Push the
SIMM back until it snaps into place. Install as many SIMMs as
you need to match the configuration in the table.
6. Replace the power supply, internal drive bay, and system-unit
cover. Reconnect peripheral devices and plug in the power and
phone cords.
When you start the computer, it will automatically recognize the change in
memory configuration.
(ALL/all-06/16/94)