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Memory Address
FFFFFFFFh to FFF80000h
FEEFFFFFh to FEE00000h
FECFFFFFh to FEC00000h
FEBFFFFFh to TOM (Top of
Memory)
TOM (Top of Memory) – 1 to TOM
– 64 KB
TOM (Top of Memory) – 64 KB
- 1 to 01000000h
00FFFFFFh to 00100000h
000FFFFFh to 000F0000h
000EFFFFh to 000E0000h
000DFFFFh to 000C0000h
000BFFFFh to 000A0000h
0009FFFFh to 00000000h
1 KB = 1024 bytes. Any memory above host memory is non-cacheable.
Table 6-5
System Memory Map
Size
512 KB
1024 KB
1024 KB
Depends on memory installed
64 KB (However, USB buffer is not
applicable to all system
configurations.)
Depends on memory installed
15360 KB
64 KB
64 KB
128 KB
128 KB
640 KB
Specifications 6-7
System Function
System ROM
Local APIC address range
I/O APIC address range
PCI memory expansion board
USB memory buffers
HOST memory expansion
HOST memory expansion
System ROM
Expansion system ROM
Option ROM
Video RAM
Base memory
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