MSI MS-7255 manual PCI Interrupt Request Routing, 2-21, Hardware Setup

Hardware Setup

PCI Interrupt Request Routing

The IRQ, acronym of interrupt request line and pronounced I-R-Q, are hardware lines over which devices can send interrupt signals to the microprocessor. The PCI IRQ pins are typically connected to the PCI bus pins as follows:

	Order 1	Order 2	Order 3	Order 4
PCI Slot 1	INT B#	INT C#	INTD#	INT A#
PCI Slot 2	INT C#	INTD#	INT A#	INT B#

2-21