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User’s Guide
PCI Device Latency Timer
This parameter allows you to set the length of time for a PCI device
to use the PCI bus.
A PCI master can burst indefinitely as long as the target can
source/sink the data, and no other agent requests for the bus. If
another PCI device requests for the use of the PCI bus, a PCI bus
arbitration takes place, and the tenure of the device currently using
the PCI bus cannot go over the PCI latency time set in BIOS. This
setting depends on your application. For example, if you install a
high bandwidth block I/O card, e.g., FDDI, the longer the latency time
the better. This setting only affects the primary PCI components (PCI
slots 1, 2, 3, 4, and onboard LAN). The secondary PCI components
(PCI slots 4) are always set to 20 PCI clocks.
PCI IRQ Sharing
Setting this parameter to
Yes
allows you to assign the same IRQ to
two different devices. To disable the feature, select
No
.
If there are no IRQs available to assign for
the remaining device function, we
recommend that you enable this parameter.
VGA Palette Snoop
This parameter permits you to use the palette snooping feature if you
installed more than one VGA card in the system.