Abit KR7A, User Manual

Page: 61 / 104

Introducing the BIOS
User’s Manual
3-33
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.
Assign IRQ For 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 .
Assign IRQ For 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 6). 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 VIA VT8233 chipset), INT#
(means PCI slot IRQ signals) and devices, please refer to the table below:
SIGNALS
PCI
Slot 1
PCI
Slot 2
PCI
Slot 3
PCI
Slot 4
PCI
Slot 5
PCI
Slot 6
PIRQ_0 Assignment INT A INT B INT B INT D INT C INT D
PIRQ_1 Assignment
INT B INT D INT A INT A INT D INT B
PIRQ_2 Assignment INT C INT C INT D INT B INT A INT C
PIRQ_3 Assignment INT D INT A INT C INT C INT B INT A
!
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).