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7 System Resources
7.1 System Memory Map
Table 37
Memory Map
Address Range (decimal)
Address Range (hex)
Size
Description
1296MB – 1304MB (logic)
51000000 – 51800000
8MB
GeodeLink Interface Unit
1028MB – 1029MB (logic)
40400000 – 4043FFFF
256kB
VSA (Virtual System Architecture)
(TOM-64kB) – TOM
N.A.
64kB
ACPI reclaim, MPS and NVS area **
(TOM-24MB-64kB) – (TOM-
64kB)
N.A.
24 MB
VGA graphics memory and frame buffer *
896 k – 1024 k
E0000 - FFFFF
128 kB
Runtime BIOS
800 k – 896 k
C8000 - DFFFF
96 kB
Upper memory***
640 k – 800 k
A0000 - C7FFF
160 kB
Video memory and BIOS
639 k – 640 k
9FC00 - 9FFFF
1 kB
Extended BIOS data
0 – 639k
00000 - 9FC00
512 kB
Conventional memory
Notes
T.O.M. = Top of memory = max. DRAM installed
* VGA graphics memory can be configured from 2 MB up to 254 MB in setup.
** Only if ACPI Aware OS is set to YES in setup.
*** The UMA area from C8000h – DFFFFh will only be available if Network Boot
Support and External HDD Boot Support are not used.
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