Biostar M6VCT M6VCT user's manual - Page 65

Resources Controlled By, Auto ESCD, IRQ Resources, DMA Resources, PCI / VGA Palette Snoop

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Chapter 2 BIOS Setup provides for non-PnP ISA add-on cards. PCI / ISA PnP signifies that a resource is assigned to the PCI Bus or provides for ISA PnP add-on cards and peripherals. The Choices: Disabled (default), Enabled. Resources Controlled By By Choosing "Auto" the system BIOS will detect the system resources and automatically assign the relative IRQ and DMA channel for each peripheral. By Choosing "Manual", the user will need to assign IRQ & DMA for add-on cards. Be sure that there are no IRQ/DMA and I/O port conflicts. The Choices: Auto (ESCD) (default), Manual. IRQ Resources When resources are controlled manually, assign each system interrupt a type, depending on the type of device using the interrupt. 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. Disabled (default) Disables the function. Enabled Enables the function. 2-29

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Chapter 2
BIOS Setup
2-29
provides for non-PnP ISA add-on cards.
PCI / ISA PnP signifies that a resource
is assigned to the PCI Bus or provides for ISA PnP add-on cards and peripherals.
The Choices: Disabled
(default), Enabled.
Resources Controlled By
By Choosing “Auto” the system BIOS will detect the system resources and
automatically assign the relative IRQ and DMA channel for each peripheral.
By Choosing “Manual”, the user will need to assign IRQ & DMA for add-on
cards.
Be sure that there are no IRQ/DMA and I/O port conflicts.
The Choices:
Auto (ESCD)
(default)
,
Manual.
IRQ Resources
When resources are controlled manually, assign each system interrupt a type,
depending on the type of device using the interrupt.
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.
Disabled
(default)
Disables the function.
Enabled
Enables the function.