VIA Technologies P4MA PRO User Manual page 56

IRQs Activities
Press <Enter> to enter the sub-menu and the following screen appears:
Primary INTR
Selecting ON will cause the system to wake up from power saving modes
if activity is detected from any enabled IRQ channels. Settings: OFF and
ON.
IRQ3~IRQ15
Enables or disables the monitoring of the specified IRQ line. If set to
Enabled, the activity of the specified IRQ line will prevent the system
from entering power saving modes or awaken it from power saving modes.
Settings: Disabled and Enabled.
Note: IRQ (Interrupt Request) lines are system resources allocated to I/
O devices. When an I/O device needs to gain attention of the operating
system, it signals this by causing an IRQ to occur. After receiving the
signal, when the operating system is ready, the system will interrupt
itself and perform the service required by the IO device.
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BIOS Setup