AMD AMD-8151 HyperTransport AGP3.0 Revisi - Halaman 14

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AMD-8151™ HyperTransport™ AGP3.0 Graphics Tunnel

25912 Rev. 3.06 March 2006

Revision Guide

28 The AMD-8151™ Tunnel Lacks Extended Configuration Space

Memory-Mapped I/O Base Address Register

Description

Current AMD processors do not natively support PCI-defined extended configuration space. A

memory-mapped I/O base address register (MMIO BAR) is required in chipset devices to support

extended configuration space. The AMD-8151 does not have this MMIO BAR.

Potential Effect on System

The AMD-8151 is not a PCI-X

Mode 2 or PCI Express

capable device and is not required to

support the MMIO BAR. However, using a device with an MMIO BAR and an AMD-8151 on the

same HyperTransport™ link of the processor may cause firmware/software problems.

Suggested Workaround

It is strongly recommended that system designers do not connect the AMD-8151 and devices that use

extended configuration space MMIO BARs (ex: HyperTransport-to-PCI Express bridges) to the same

processor HyperTransport link.

Fix Planned

Product Errata