82G33 datasheet(62/437 Pages) INTEL

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System Address Map

Datasheet

There are sub-ranges within the PCI Memory address range defined as APIC

Configuration Space, FSB Interrupt Space, and High BIOS Address Range. The

exceptions listed above for internal graphics and the PCI Express ports MUST NOT

overlap with these ranges.

Figure 3-4. PCI Memory Address Range

DMI Interface

(subtractive decode)

FEF0_0000h

4 GB – 2 MB

FSB Interrupts

FEE0_0000h

PCI Express Configuration

Space

E000_0000h

High BIOS

FFE0_0000h

FFFF_FFFFh

4 GB

4 GB – 17 MB

DMI Interface

(subtractive decode)

FED0_0000h

4 GB – 18 MB

Local (Processor) APIC

FEC8_0000h

4 GB – 19 MB

I/O APIC

FEC0_0000h

4 GB – 20 MB

DMI Interface

(subtractive decode)

F000_0000h

4 GB – 256 MB

Possible address

range/size (not

ensured)

4 GB – 512 MB

DMI Interface

(subtractive decode)

TOLUD

Optional HSEG

FEDA_0000h to

FEDB_FFFFh

BARs, Internal

Graphics

ranges, PCI

Express Port,

CHAPADR could

be here.

MemMap_PCI

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