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Chapter 3

 

 

PCI /VGA Palette Snoop:

Two options are available: Disabled or Enabled. The default setting is Disabled. This option allows the BIOS to preview VGA Status, and to modify the information delivered from the Feature Connector of the VGA card to the MPEG Card. This option can set the display inversion to black after you have used the MPEG card.

Allocate IRQ to VGA:

Two options are available: Disabled or Enabled. The default setting is Enabled. Name the interrupt request (IRQ) line assigned to the USB/VGA/ACPI (if any) on your system. Activity of the selected IRQ always awakens the system.

You can assign an IRQ for the either PCI or AGP VGA or Disabled.

Allocate IRQ to USB:

Two options are available: Disabled or Enabled. The default setting is Enabled. If you need free up another IRQ, you can choose to disable this item to an IRQ. However, some situations in Windows® 95 may cause the USB port to malfunction or experience other problems!

PIRQ_0 Use IRQ No. ~ PIRQ_3 Use IRQ No.:

Eleven options are available: Auto ) 3 ) 4 ) 5 ) 7 ) 9 ) 10 ) 11 ) 12 ) 14 ) 15. Default setting is Auto. This item allows the system to automatically specify the IRQ number for the device installed on PCI slots. This means that the system can specify the fixed IRQ number for the device installed on the PCI slots (PCI slot 1 to PCI slot 5). This is a useful function for when you want to fix the IRQ for a specific device.

For example, if you want to move your hard disk to another computer and don’t want to re-install Windows® NT or Windows® 2000, you can simply specify the IRQ for the device installed on the new computer to fit the original computer settings.

This feature is for the operating system that will record and fix the PCI configuration status if you want to change it.

For the relations between the hardware layout of PIRQ (the signals from the SiS 961chipset), INT# (means PCI slot IRQ signals) and devices, please refer to the table below:

SIGNALS

PCI

PCI

PCI

PCI

PCI

Slot 1

Slot 2

Slot 3

Slot 4

Slot 5

 

PIRQ_0 Assignment

INT A

INT B

INT B

INT D

INT C

PIRQ_1 Assignment

INT B

INT D

INT A

INT A

INT D

PIRQ_2 Assignment

INT C

INT C

INT D

INT B

INT A

PIRQ_3 Assignment

INT D

INT A

INT C

INT C

INT B

!USB used INT D.

!Each PCI slot has four INT#s (INT A~INT D), and the AGP slot has two INT# (INTA and INT B).

SD7-533 Motherboard