Manuals

Manuals

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

  1. Remove computer cover.
  2. Locate SIMM sockets.
  3. Install or replace SIMMs as necessary to reach desired total. 
    
    See Installing/Removing SIMMs.
  4. 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. 
    
  5. Enter System Setup to check SYSTEM MEMORY.
  6. If the total is still incorrect, check the SIMMs again to make sure they are 
    properly installed.
  7. When SYSTEM MEMORY is correct, insert the diagnostics diskette into drive A and 
    reboot.
  8. 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.

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