4-18
Chapter 4
This section describes configuring the PCI bus system and PnP (Plug &
Play) feature. PCI, or
P
eripheral
C
omponent
I
nterconnect, is a system which
allows I/O devices to operate at speeds nearing the speed the CPU itself uses
when communicating with its special components. This section covers some
very technical items and it is strongly recommended that only experienced
users should make any changes to the default settings.
Clear NVRAM
The ESCD (Extended System Configuration Data) NVRAM (Nonvolatile Ran-
dom Access Memory) is where the BIOS stores resource information for both
PNP and non-PNP devices in a bit string format. When the item is set to [Yes],
the system will reset ESCD NVRAM right after the system is booted up and
then set the setting of the item back to [No] automatically.
PCI Latency Timer (PCI Clocks)
This item controls how long each PCI device can hold the bus before another
takes over. When set to higher values, every PCI device can conduct
transactions for a longer time and thus improve the effective PCI bandwidth.
For better PCI performance, you should set the item to higher values. Settings
range from [32] to [248] at a 32 increment.
4.7 PNP/PCI Configurations
