82830MP Datasheet, PDF (101/159 Pages) Intel Corporation – Intel 830MP Chipset: 82830MP Graphics and Memory Controller Hub (GMCH-M)

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Figure 10. Detailed Memory System Address Map
Extended
P6 Memory
Intel^® 830MP Chipset
Pre-Allocated
Memory
AGP
Window
AGP
Window
Upper
BIOS Area
(64 KB)
Lower
BIOS Area
(64 KB)
16 KB x 4
Expansion
Card
BIOS and
Buffer Area
(128 KB)
16 KB x 8
1 MB
960 KB
896 KB
768 KB
Standard
PCI/ISA
Video
Memory
(SMM Memory)
128 KB
Optionally
Mapped to
AGP
640 KB
Dos Area
5.1.2
Compatibility Area
This area is divided into the following address regions:
0 - 640KB DOS Area
640 - 768KB Video Buffer Area
768 - 896KB in 16-KB sections (total of 8 sections) - Expansion Area
896 -960 KB in 16-KB sections (total of 4 sections) - Extended System BIOS Area
960 KB - 1 MB Memory (BIOS Area) - System BIOS Area
There are 16 memory segments in the compatibility area. Thirteen of the memory ranges can be enabled
or disabled independently for both read and write cycles.
298338-001
Datasheet
101