Interrupt Level

The interrupt level defines the source of the interrupt and is often referred to as the interrupt source.

There are basically two types of interrupt levels: system and bus. The bus interrupts are generated by the devices on the buses (such as PCI, ISA, VDEVICE, and PCI-E). Examples of system interrupts are the timer and Environmental and Power Off Warning (EPOW).

The interrupt level of a bus or system interrupt is one of the resources managed by the respective configuration methods.