Intel Desktop Board D975XBX Technical Product Specification
48
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
FLASH
APIC
Reserved
0 MB
640 KB
1 MB
Top of usable
DRAM (memory
visible to the
operating
system)
PCI Memory Range -
contains PCI, chipsets,
Direct Media Interface
(DMI), and ICH ranges
(approximately 750 MB)
DOS
Compatibility
Memory
DRAM
Range
OM17801
~20 MB
8 GB
Top of System Address Space
Upper
4 GB of
address
space
Figure 16. Detailed System Memory Address Map
Summary of Contents for D975XBX
Page 27: ...Product Description 27 O...
