Biostar K8M800-M7A Manual page 67

K8M800-M7A BIOS Setup
PCI / VGA Palette Snoop
Choose Disabled or Enabled. Some graphic controllers which are not VGA compatible
take the output from a VGA controller and map it to their display as a way to provide boot
information and VGA compatibility.
However, the color information coming from the VGA controller is drawn from the palette
table inside the VGA controller to generate the proper colors, and the graphic controller
needs to know what is in the palette of the VGA controller. To do this, the non-VGA
graphic controller watches for the Write access to the VGA palette and registers the snoop
data. In P CI based systems, where the VGA controller is on the P CI bus and a non-VGA
graphic controller is on an ISA bus, the Write Access to the palette will not show up on the
ISA bus if the P CI VGA controller responds to the Write.
In this case, the P CI VGA controller should not respond to the Write, it should only snoop
the data and permit the access to be forwarded to the ISA bus. The non-VGA ISA
graphic controller can then snoop the data on the ISA bus. Unless you have the above
situation, you should disable this option.
Disabled (default)
Enabled
Assign IRQ For VGA
This item allows the users to choose which IRQ to assign for the VGA.
The Choices: Enabled (default), Disabled.
Assign IRQ For USB
This item allows the users to choose which IRQ to assign for the USB.
The Choices: Enabled (default), Disabled.
Disables the function.
Enables the function.
36