440EX/LX AT
MAINBOARD
AWARD BIOS SETUP
4-17
Assign IRQ For VGA/USB
The system’s IRQ signals are limited and sometimes you may feel like to some more
IRQ signals for your add-on cards. The system BIOS of this mainboard allows you to
disable the IRQ which is supposed to be connected to VGA and USB ports. When you
have choose to disable the IRQ on VGA or USB port, the IRQ on the related port will
be released and becomes available for other devices.
Before you decide to proceed with the change, please make sure that your USB and
VGA adapter will not use the IRQ signal. Otherwise, your PC system will become
abnormal and the devices connected to these ports may not be working at all.
It is very simple to tell the difference. If you are going to disable the IRQ on the USB
port, check whether is any device connected to the USB port. If you can not find any
device, you may feel free to disable the IRQ on the USB port and have the IRQ used by
other device.
As for VGA adapter, it will be a little difficult. You may try to find whether your VGA
card requires the IRQ signal or not. If you can not find the information from the user’s
manual of your VGA card. You may use the following information to make your
choice:
1.
Most VGA cards do not need to have the IRQ signal.
2.
If you can not find the feature connector on your VGA card, than it is quite possible
that your VGA card does not need the IRQ signal.
3.
If your VGA card has the feature connector on the VGA card but it has nothing
connected to it. In this case, you still may have the IRQ disabled.
4.
If you have another add on card like video capture card which is connected to the
feature connector on the VGA card, In this case, you can not disable the IRQ signal
because the IRQ signal will be connected to the video capture card.
