Intel 815 Manuel D’Utilisation

  

23 

Processor

PCI Configuration

Window in I/O Space

Hub Interface

DRAM* Control/

Host Bridge

Bus #0
Dev #0

AGP

Bridge

Bus #0
Dev #1

PCI

Devices

Hub Interface

LPC Device

Bus #0

Dev #31

Fcn #0

Hub I/F - PCI

Bridge (P2P)

PBus #0
Dev #30

Fcn #0

Hub Interface 0

(Logical PCI Bus #0)

AGP

Master

AGP/

Secondary PCI

(Bus #A -

programmable)

Primary PCI

(Bus #B - programmable)

ICH

= Logical PCI Bus #0

PCI Configuration

Window in I/O Space

Hub Interface

DRAM* Control/

Host Bridge

Bus #0
Dev #0

Internal

Graphics

Bus #0
Dev #2

 

There are multiple Device Modes that are supported by the three PCI devices within this component: 

1.  AGP Mode – The AGP slot is populated with an AGP graphics card and the AGP interface device 

is active. The internal graphics controller is inactive. 

2.  GFX Mode with Local Memory – The internal graphics device is active. The AGP slot is 

populated with a GPA card and the AGP interface device is inactive. 

3.  GFX Mode with Shared Memory – The internal graphics device is active. The AGP slot is not 

populated with a GPA card or an AGP graphics card and the AGP interface device is inactive. 

4.  PCI Mode – The internal graphics controller and the AGP interface device are both inactive. The 

display data cycles are routed through the hub interface to the PCI display device. 

For modern operating systems that have multiple monitor support, the primary graphics device must not 
be the Intel

®

 815 chipset internal graphics controller or an AGP graphics card. These graphics devices 

can serve only as secondary graphics devices in a multi-monitor configuration. It is important to 
understand that there is no support for simultaneous operation of the internal graphics device and an 
AGP graphics card.