MSI KM4M User Guide - Page 55

PCI/VGA Palette Snoop, Assign IRQ for VGA/USB, VGA Palette Snoop, Bit Setting, Action

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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: 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. 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. 3-22

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3-22
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.