User`s manual

4-10

X7DVL-L User's Manual

Emulated IRQ Solution

All PCI-E devices are required to support MSI (Message Signaled Interrupt);

however, some legacy operating systems do not support MSI. When this feature

is set to Enabled, a PCI-E device will generate a device-speciﬁ c address and

interrupt vector number stored in the device's MSI and data registers which will

be initialized by BIOS before a "non-MSI-aware" OS boots up in order to enhance

system performance. The options are Enabled and Disabled.

Onboard Storage OPROM Conﬁ gure

Enabling this option provides the capability to boot from an onboard storage device.

The options are Enabled and Disabled.

PCI-Exp. I/O Performance

Some add-on cards perform faster with the coalesce feature, which limits the

payload size to 128 Bytes; while others, with a payload size of 256 Bytes which

inhibits the coalesce feature. Please refer to your add-on card user guide for the

desired setting. The options are Coalesce and 128 Bytes.

PCI Parity Error Forwarding

The feature allows SERR and PERR errors detected in PCI slots to be sent

(forwarded) to the BIOS DMI Event Log for the user to review. The options are

Enabled and Disabled.

ROM Scan Ordering

This feature allows the user to decide which Option ROM to be activated ﬁ rst. The

options are Onboard ﬁ rst and Add-On ﬁ rst.

PCI Fast Delay Transactions

Select Enabled to use this feature which will improve performance on heavy DMA

transfer for PCI 32-bit multimedia cards. The options are Enabled and Disabled.

Reset Conﬁ guration Data

If set to Yes, this setting clears the Extended System Conﬁ guration Data- (ESCD)

area. The options are Yes and No.

Frequency for PCI-X#5-#6

This option allows the user to change the bus frequency for the devices installed

in the slot indicated. The options are Auto, PCI 33 MHz, PCI 66 MHz, PCI-X 66

MHz, PCI-X 100 MHz, and PCI-X 133 MHz.

Slot1 PCI 33MHz, Slot5 PCI-X 133MHz, Slot6 PCI-X 133MHz, Slot6

<Ext> PCI-Exp. x8

Access the submenu for each of the settings above to make changes to the

following: