Datasheet

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