Installation guide

3.1.2 PCI-Based Systems with ATI Mach64 Graphics Controllers

On PCI machines that include ATI Mach64 graphics controllers in the

conﬁguration, you must set the console environment pci_parity variable

to off. Due to a hardware limitation, hardware machine checks will occur if

this variable is not turned off. Use the following commands:

>>> set pci_parity off

>>> init

3.1.3 PCI Shared Interrupt Support

In Version 3.2D and subsequent releases of the operating system, the PCI-

based system and I/O support code is capable of shared interrupts. The only

exception is the 53C810 (onboard or option) SCSI controller.

You can use the following console ﬁrmware command to determine if your

system has a 53C810 SCSI controller:

>>> show config

To set up your PCI-based system to share interrupts, you must ensure the

following:

• The ﬁrmware revision for your system supports shared interrupts.

• You have placed the option cards in PCI slots that allow sharing.

Refer to your layered product documentation (for example, for MME or

Open3D) for information about the shared interrupt capabilities of the

software.

3.1.4 KZPSA Behind the PCI-to-PCI Bridge

On AlphaServer 1000A and 2100A class systems, updating the ﬁrmware on a

KZPSA SCSI adapter is not supported when the adapter is behind the PCI-

to-PCI bridge. See your hardware installation guide for further information.

A later version of the console ﬁrmware will support this feature.

3.1.5 Qlogic ISP1040B CAM Errors

On systems with a Qlogic ISP1040B option, CAM errors like the following

may occur during bootup:

pci2000 at pci0 slot 8

isp0 at pci2000 slot 0

isp0: QLOGIC ISP1020A

cam_logger: CAM_ERROR packet

cam_logger: bus 0

isp_probe

NVRAM parameters invalid, using driver Fast10 defaults

3–2 Processor-Speciﬁc Notes