Microstar G52-MA00514 manual PCI/VGA Palette Snoop, VGA Palette Snoop Bit Setting Action

Chapter 3

Press <Enter> and you will enter the sub-menu of the items. IRQ Resources list IRQ 3/4/5/7/9/10/11/12/14/15 for users to set each IRQ a type depending on the type of device using the IRQ. Settings are:

PCI Device	For Plug & Play compatible devices designed for PCI
Reserved	bus architecture.
	The IRQ will be reserved for further request.

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	Action
Disabled	Data read or written by the CPU is only directed to the PCI
	VGA device’s palette registers.
Enabled	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.

The setting must be set to Enabled if any ISA bus adapter in the system requires VGA palette snooping.

3-24