Pnp/Pci Configurations - MSI MS-7031 User Manual

MS-7031 Micro ATX Mainboard
This section describes configuring the PCI bus system and PnP (Plug & Play)
feature. PCI, or Peripheral Component Interconnect, is a system which allows I/O
devices to operate at speeds nearing the speed the CPU itself uses when communi-
cating 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 ESCD
The ESCD (Extended System Configuration Data) NVRAM (Non-volatile Random
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 [Enabled], the
system will reset ESCD NVRAM right after the system is booted up and then set
the setting of the item back to [Disabled] automatically. Setting options: [Enabled],
[Disabled].
PCI/VGA Palette Snoop
When 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 Setting
[Disabled]
[Enabled]
The setting must be set to [Enabled] if any ISA bus adapter in the system requires
VGA palette snooping.
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PNP/PCI Configurations

Data read or written by the CPU is only directed to the PCI
VGA device's palette registers.
Data read or written by the CPU is directed to both the PCI
VGA device's palette registers and the ISA VGA device's
palette registers, permitting the palette registers of both
VGA devices to be identical.
Action