Intel KM4AM - Manual (Page 55)

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MS-6734 M-ATX Mainboard
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:
The setting must be set to Enabled if any ISA bus adapter in the system requires VGA
palette snooping.
Assign IRQ for VGA/USB
The items allow you to assign an IRQ line to the VGA card and USB device separately.
Options: Enabled, Disabled.
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.