Memory
Adding System Memory
Performing a Memory Upgrade
Base/Board Memory
Upper Memory Map
Conventional Memory Map
Cache Memory
Adding System Memory
Memory can be increased to a maximum of 64 MB by installing 4-, 8-, 16-, and/or 32-MB
SIMMs in 2 SIMM sockets on the system board.
SIMMs and SIMM Sockets
Performing a Memory Upgrade
Remove computer cover.
Locate SIMM sockets.
Install or replace SIMMs as necessary to reach desired total.
See Installing/Removing SIMMs.
Replace the cover, reconnect to power, and turn on.
After POST, the computer displays the total amount of SIMM memory installed.
NOTE: If the amount is incorrect, turn off and disconnect the computer,
remove the cover, and make sure the SIMMs are seated properly in their sockets.
Then repeat step 4.
If the system detects that the new memory does not match the system configuration
information in NVRAM, the following error message appears:
The amount of system memory has changed.
Strike the F1 key to continue, F2 to run the setup utility.
Enter System Setup to check SYSTEM MEMORY.
If the total is still incorrect, check the SIMMs again to make sure they are
properly installed.
When SYSTEM MEMORY is correct, insert the diagnostics diskette into drive A and
reboot.
Run the RAM Test Group in the diskette-based diagnostics to test all installed
SIMMs.
Base/Board Memory
Total
|
SIMM1
|
SIMMB
|
4 MB
|
4 MB
|
|
8 MB
|
4 MB
|
4 MB
|
8 MB
|
8 MB
|
|
12 MB
|
4 MB
|
8 MB
|
16 MB
|
8 MB
|
8 MB
|
16 MB
|
16 MB
|
|
20 MB
|
16 MB
|
4 MB
|
24 MB
|
16 MB
|
8 MB
|
32 MB
|
16 MB
|
16 MB
|
32 MB
|
32 MB
|
|
36 MB
|
4 MB
|
32 MB
|
40 MB
|
32 MB
|
8 MB
|
48 MB
|
16 MB
|
32 MB
|
64 MB
|
32 MB
|
32 MB
|
Upper Memory Map
Segment
|
Address Range
|
Description
|
A
|
A0000h-AFFFFh
|
Video memory
|
B
|
B0000h-BFFFFh
|
Video memory
|
C
|
C0000h-C7FFFh
C8000h-CFFFFh
|
Video BIOS
Available
|
D
|
D0000h-DFFFFh
|
Available
|
E
|
E0000h-EFFFFh
|
Available
|
F
|
F0000h-FFFFFh
|
System BIOS
|
Conventional Memory Map
Segment
|
Address Range
|
Use
|
0
|
00000h-003FFh
00400h-004FFh
00500h-005FFh
00600h-0FFFFh
|
Interrupt vector table
BIOS data area
MS-DOS work area
User memory
|
1
|
10000h-1FFFFh
|
User memory
|
2
|
20000h-2FFFFh
|
User memory
|
3
|
30000h-3FFFFh
|
User memory
|
4
|
40000h-4FFFFh
|
User memory
|
5
|
50000h-5FFFFh
|
User memory
|
6
|
60000h-6FFFFh
|
User memory
|
7
|
70000h-7FFFFh
|
User memory
|
8
|
80000h-8FFFFh
|
User memory
|
9
|
90000h-9FFFFh
|
User memory
|
Cache Memory
Systems with Intel486 SX or SX2 microprocessors can be upgraded by installing 128 KB of
cache memory (this memory is standard on systems with IntelDX2 and IntelDX4
microprocessors).
See Installing Cache Memory.
|