Abit SI7, SI7-G LAN, INT A, INT B, PCI-1, INT A, INT B, INT C, INT D, PCI-2, INT B, INT D, INT C, INT A, PCI-3, INT B, INT A, INT D, INT C, PCI-4, INT D, INT A, INT B, INT C

3-14 Chapter 3

PIRQ_0 Use IRQ No. ~ PIRQ_3 Use IRQ No.:

This item specifies the IRQ number manually or automatically for the devices installed on PCI slots.

For the relations between the hardware layout of PIRQ, INT# (PCI slot IRQ signals) and devices, please refer to the table below:

Signals	PIRQ_0	PIRQ_1	PIRQ_2	PIRQ_3
	Assignment	Assignment	Assignment	Assignment
AGP	INT A	INT B
PCI-1	INT A	INT B	INT C	INT D
PCI-2	INT B	INT D	INT C	INT A
PCI-3	INT B	INT A	INT D	INT C
PCI-4	INT D	INT A	INT B	INT C
PCI-5	INT C	INT D	INT A	INT B
LAN				INT A
SATA			INT A

NOTE:

•PCI slot 1 shares IRQ signals with AGP slot.•PCI slot 2 shares IRQ signals with PCI slot 3.•PCI slot 4 shares IRQ signals with LAN.•PCI slot 5 shares IRQ signals with SATA.

•If you want to install two PCI cards into those PCI slots that share IRQ with one another at the same time, you must make sure that your OS and PCI devices’ driver supports the IRQ sharing function.

SI7 Series