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Chapter 2 WINBIOS Setup 65
PCI/PnP Setup
Choose the PCI/PnP Setup icon from the WINBIOS Setup screen to display the
PCI and Plug and Play Setup options, described below.
PCI VGA Palette Snoop When this option is set to Enabled, multiple VGA devices operating on
different buses can handle data from the CPU on each set of palette registers
on every video device. Bit 5 of the command register in the PCI device
configuration space is the VGA Palette Snoop bit (0 is disabled). For example: if
there are two VGA devices in the computer (one PCI and one ISA) and:
VGA Palette Snoop
Bit Setting
Action
Disabled
Data read and written by the CPU is only directed to the PCI VGA
device's palette registers.
Enabled
Data read and written by the CPU is directed to the both the PCI VGA
device's palette registers and the ISA VGA device palette registers,
permitting the palette registers of both devices to be identical.
This option must be set to Enabled if any ISA adapter card installed in the
system requires VGA palette snooping. The Optimal and Fail-Safe default
settings are Disabled.
Allocate IRQ To PCI VGA Set this option to Yes to allow AMIBIOS to allocate an IRQ for the
VGA controller on the PCI bus. When set to No, AMIBIOS will not allocate an
interrupt to the PCI VGA, even if the PCI VGA request an interrupt. The
settings are Yes or No. The Optimal default setting is No. The Fail-Safe default
setting is Yes.
USB Device Latency This option specifies the latency for USB device. The settings are
Disabled, The settings are 32, 64, 96, 128, 160, 192, 224, or 248. The Optimal
and Fail-Safe default settings are Disabled.
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