MSI MS-6341 Manual page 38

Chapter 2
PCI Interrupt Request
The IRQ, abbreviation 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 connectoed to the PCI bus
INTA#-INTD# pins as follows.
PCI Slot1 A
PCI Slot2 B
PCI Slot3 C
PCI Slot4 D
PCI Slot5 A
INT#A INT#B INT#C INT#D IDSEL
B C
C D
D A
A B
B C
2-26
D AD20
A AD21
B AD22
C AD23
D AD24