Functional Architecture
Intel® Server Boards SE7320SP2 and SE7525GP2
Revision
4.0
46
DOS Area
The DOS region is 512 KB in the address range 0 to 07FFFFh. This region is fixed and
all accesses go to main memory.
ISA Window Memory
The ISA Window Memory is 128 KB between the address of 080000h to 09FFFFh. This
area can be mapped to the PCI bus or main memory.
Video or SMM Memory
The 128 KB Graphics Adapter Memory region at 0A0000h to 0BFFFFh is normally
mapped to the VGA controller on the PCI bus. This region is also the default region for
SMM space.
Add-in Card BIOS and Buffer Area
The 128 KB region between addresses 0C0000h to 0DFFFFh is divided into eight
segments of 16 KB segments mapped to ISA memory space, each with programmable
attributes, for expansion cards buffers. Historically, the 32 KB region from 0C0000h to
0C7FFFh has contained the video BIOS location on the video card.
Extended System BIOS
This 64 KB region from 0E0000h to 0EFFFFh is divided into four blocks of 16 KB each,
and may be mapped with programmable attributes to map to either main memory or to
the PCI bus. Typically this area is used for RAM or ROM. This region can also be used
extended SMM space.
System BIOS
The 64 KB region from 0F0000h to 0FFFFFh is treated as a single block. By default this
area is normally read/write disabled with accesses forwarded to the PCI bus. Through
manipulation of read-write attributes, this region can be shadowed into main memory.
Summary of Contents for SE7320SP2 - 800MHZ Ecc Ddr Xeon
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