Detailed System Memory Address Map - Intel S975XBX2 - Workstation Board Motherboard Specification

Intel Workstation Board S975XBX2 Technical Product Specification
the system memory map. All installed system memory can be used when there is no
overlap of system addresses.
PCI Memory Range -
contains PCI, chipsets,
Direct Media Interface
(DMI), and ICH ranges
(approximately 750 MB)
DRAM
Range
Compatibility
Memory
Figure 14. Detailed System Memory Address Map
48
8 GB
Top of System Address Space
FLASH
APIC
Reserved
DOS
Upper
4 GB of
address
space
~20 MB
0FFFFFH
0F0000H
0EFFFFH
Top of usable
DRAM (memory
visible to the 0E0000H
operating system)
0DFFFFH
0C0000H
0BFFFFH
1 MB
640 KB
0A0000H
09FFFFH
00000H
0 MB
1 MB
Upper BIOS
area (64 KB)
960 KB
Lower BIOS
area
(64 KB;
16 KB x 4)
896 KB
Add-in Card
BIOS and
Buffer area
(128 KB;
16 KB x 8)
768 KB
Standard PCI/
ISA Video
Memory (SMM
Memory)
128 KB
640 KB
DOS area
(640 KB)
0 KB
OM18311