Intel BOXD865PERL Product Specification - Page 52

Detailed System Memory Address Map

Page 52 highlights

Intel Desktop Board D865PERL Technical Product Specification memory, AGP aperture set for 256 MB, and the PCI cards are requesting 200 MB of system address space. 4 GB Top of System Address Space FLASH APIC Reserved ~20 MB PCI Memory Range (contains AGP window, AGP aperture, PCI, and ICH ranges) DRAM Range DOS Compatibility Memory Top of usable DRAM (memory visible to the operating system) 1 MB 640 KB 0 MB 0FFFFFH 0F0000H 0EFFFFH 0E0000H 0DFFFFH 0C0000H 0BFFFFH 0A0000H 09FFFFH 00000H Upper BIOS area (64 KB) Lower BIOS area (64 KB; 16 KB x 4) Add-in Card BIOS and Buffer area (128 KB; 16 KB x 8) Standard PCI/ ISA Video Memory (SMM Memory) 128 KB * DOS area (640 KB) 1 MB 960 KB 896 KB 768 KB 640 KB 0 KB * Optionally mapped to the internal AGP OM16106 Figure 18. Detailed System Memory Address Map 52

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Intel Desktop Board D865PERL Technical Product Specification
52
memory, AGP aperture set for 256 MB, and the PCI cards are requesting 200 MB of system
address space.
Upper BIOS
area (64 KB)
Lower BIOS
area
(64 KB;
16 KB x 4)
Add-in Card
BIOS and
Buffer area
(128 KB;
16 KB x 8)
Standard PCI/
ISA Video
Memory (SMM
Memory)
128 KB *
DOS area
(640
KB)
1 MB
960 KB
896 KB
768 KB
640 KB
0 KB
0FFFFFH
0F0000H
0EFFFFH
0E0000H
0DFFFFH
0C0000H
0BFFFFH
0A0000H
09FFFFH
00000H
* Optionally mapped
to the internal AGP
FLASH
APIC
Reserved
0 MB
640 KB
1 MB
Top of usable
DRAM (memory
visible to the
operating
system)
PCI Memory Range
(contains AGP window,
AGP aperture, PCI, and
ICH ranges)
DOS
Compatibility
Memory
DRAM
Range
OM16106
~20 MB
4 GB
Top of System Address Space
Figure 18.
Detailed System Memory Address Map