8 System Resources
8.1 System Memory Map
Table 36
Memory Map
Address Range (decimal)
Address Range (hex)
Size
Description
(TOM-192kB) – TOM
N.A.
192kB
ACPI reclaim, MPS and NVS area **
(TOM-8MB-192kB) – (TOM-
192kB)
N.A.
1 or 8MB
VGA frame buffer *
1024kB – (TOM-8MB-192kB)
100000 – N.A
N.A.
Extended memory
869kB – 1024kB
E0000 - FFFFF
128kB
Runtime BIOS
800kB – 869kB
D0000 - DFFFF
96kB
Upper memory
640kB – 800kB
A0000 - CFFFF
160kB
Video memory and BIOS
639kB – 640kB
9FC00 - 9FFFF
1kB
Extended BIOS data
0 – 639kB
00000 - 9FC00
512kB
Conventional memory
Note
T.O.M. = Top of memory = max. DRAM installed
* VGA frame buffer can be reduced to 1MB in setup.
** Only if ACPI Aware OS is set to YES in setup.
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