Chapter 2 AMIBIOS Setup
59
Section 5
PCI/PnP Setup
Choose PCI/PnP Setup from the AMIBIOS Setup main menu. All PCI/PnP
Setup options are described in this section.
Plug and Play-Aware OS
Set this option to
Yes
if the operating system in this computer follows
the Plug and Play specification. Windows 95 is PnP-aware. The settings are
Yes
or
No.
The default setting is
Yes
. The Optimal and Fail-Safe default settings are
No
.
PCI Latency Timer (PCI Clocks)
This option specifies the latency timings (in PCI clocks) for
PCI devices installed in the PCI expansion slots. 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 one ISA) and the
VGA Palette Snoop bit is:
Snoop Bit
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 palette registers and the ISA VGA device palette
registers, and the palette registers of both devices can be identical.
This option must be set to
Enabled
if an ISA adapter card installed in the system
uses VGA palette snooping. The Optimal and Fail-Safe default settings are
Disabled.
Allocate IRQ to PCI VGA
Set this option to
Yes
to allocate an IRQ to a VGA adapter card that
uses the PCI local bus. The settings are
Yes
or
No.
The Optimal and Fail-Safe
default settings are
Yes.
Cont’d
