2-20
MS-9161 SSI Server Board
h
Primary IDE Interrupt: IRQ14 (for AMD8111)
Secondary IDE Interrupt: IRQ15 (for AMD8111)
PCI-64 IRQ Routing
PCI DEVICE
IDSEL INT A
INT B
INT C INT D
REQ
GNT
PCIX1(Bridge
B
)
AD17
A
B
C
D
G0_B_REQ1# G0_B_GNT1#
LAN(Bridge
A
)
AD18
B
C
G0_B_REQ0# G0_B_GNT0#
PCIX2(Bridge
A
)
AD19
A
B
C
D
G0_A_REQ0# G0_A_GNT0#
PCIX3(Bridge
A
)
AD20
B
C
D
A
G0_A_REQ1# G0_A_GNT1#
SCSI(Bridge
A
)
AD21
A
G0_A_REQ2# G0_A_GNT2#
PCI Interrupt Request Routing
The IRQ, acronym of interrupt request line and pronounced I-R-Q, are hard-
ware 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:
PCI-32 IRQ Routing (for AMD8111)
PCI DEVICE
IDSEL
INT A INT B
INT C INT D
REQ
GNT
ATI VGA
AD23
C
REQ2#
GNT2#
S-ATA
AD21
A
REQ0#
GNT0#
PCI Slot2
AD25
A
B
C
D
REQ4#
GNT4#
