Biostar M7VKQ M7VKQ user's manual - Page 67

IRQ Resources, PCI / VGA Palette Snoop, Assign IRQ For VGA, The Choices, Disabled

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Chapter 2 BIOS Setup IRQ Resources This submenu will allow you to assign each system interrupt a type, depending on the type of device using the interrupt. When you press the "Press Enter" tag, you will be directed to a submenu that will allow you to configure the system interrupts. This is only configurable when "Resources Controlled By" is set to "Manual". DMA Resources When resources are controlled manually, assign each system DMA channel a type, depending on the type of device using the DMA channel. 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 PCI based systems, where the VGA controller is on the PCI 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 PCI VGA controller responds to the Write. In this case, the PCI 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. The Choices: Disabled (default) Disables the function. Enabled Enables the function. Assign IRQ For VGA Lets the user choose which IRQ to assign for the VGA. The Choices: Enabled (default), Disabled. 2-30

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Chapter 2
BIOS Setup
2-30
IRQ Resources
This submenu will allow you to assign each system interrupt a type, depending on
the type of device using the interrupt.
When you press the “Press Enter” tag, you
will be directed to a submenu that will allow you to configure the system interrupts.
This is only configurable when “Resources Controlled By” is set to “Manual”.
DMA Resources
When resources are controlled manually, assign each system DMA channel a type,
depending on the type of device using the DMA channel.
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 PCI based systems, where the VGA
controller is on the PCI 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 PCI VGA
controller responds to the Write.
In this case, the PCI 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.
The Choices:
Disabled
(default)
Disables the function.
Enabled
Enables the function.
Assign IRQ For VGA
Lets the user choose which IRQ to assign for the VGA.
The Choices: Enabled
(default), Disabled.