A PCI device may not operate correctly if it has a system-assigned interrupt vector that is more than 255 in Enterprise Editions of Windows Server 2003

SYMPTOMS

A PCI device may not operate properly in Enterprise Versions of Windows Server 2003 if it has a system allocated stop vector that exceeds than 255.

CAUSE

The Enterprise Versions of Windows Server 2003 do not carry more than 255 interrupts.

RESOLUTION

An update is presented that gives support to 255 interrupts or more in the operating systems given beow:

• Windows Server 2003, Enterprise x64 Edition

• Windows Server 2003 with Service Pack 1 (SP1), Enterprise Edition

• Windows Server 2003 with SP1, Enterprise Edition for Itanium-based Systems
To permit this update, follow one of the steps given below:

• Apply an ACPI Windows-Specific Properties Table (WSPT) given in BIOS. For details about this, contact Hardware Company.

• Add the given key to the Windows Server 2003 Boot.ini file:

/EXTINTVEC
For example, the Boot.ini file will appear as follows:
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOW S
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Micro soft Windows Server 2003" /fastdetect /EXTINTVEC

For IA-64 Itanium systems, run the following command at a command prompt:
bootcfg /raw /EXTINTVEC /id <boot id>

The boot id is achieved by running bootcfg with no switches.