Abit BX6, User Manual

Page: 52 / 103

Chapter 3 3-30
Note: If you specific the IRQ in this item, then you cannot specific the same IRQ to Legacy
ISA. Otherwise, it will cause the hardware conflict.
You must familiar with the PCI interrupt distribution mechanism to adjust this
setting. This feature is for the OS who will record and fix the PCI
configuration status, and you want to change it.
For the relations between the hardware layout of PIRQ (the signals from the
PIIX4 chipset), INT# (means PCI slot IRQ signals) and devices, please refer
to the table below:
Signals PCI slot 1
AGP slot
PCI slot 2 PCI slot 3 PCI slot 4
PCI slot 5
PIRQ_1 INT A INT B INT C INT D
PIRQ_2 INT B INT C INT D INT A
PIRQ_3
INT C INT D INT A INT B
PIRQ_4 INT D INT A INT B INT C
l
USB used PIRQ_4.
l
Each PCI slot has four INT#s (INT A~INT D), and the AGP slot has two
INT# (INTA and INT B).