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CHAPTER 3
AMI
®
BIOS USERS GUIDE
Description of the item on screen follows:
Plug and Play Aware O/S
Set this option to Yes if the operating system in this computer is
aware of and follows the Plug and Play specification. Currently, only
Windows® 95 is PnP-aware. The settings are Yes or No. The Optimal and
Fail-Safe default settings No.
PCI Latency Timer (PCI Clocks)
This option specifies the latency timings (in PCI clocks) for all PCI
devices on the PCI bus. The settings are 32, 64, 96, 128, 160, 192, 224 or 248.
The Optimal and Fail-Safe default settings are 64.
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 ISA)
and the Bit settings are:
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
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 an ISA adapter card requires
VGA palette snooping. The settings are Enabled or Disabled. The Optimal
and Fail-Safe default settings are Disabled.
Allocate IRQ to PCI VGA
Choose the IRQ to be assigned to the PCI VGA display adapter card.
The Optimal and Fail-Safe default setting is No.
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