Pci configuration – MSI FUZZY CX700D User Manual
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4-17
System Reso urces
PCI Configuration
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:
DEVICE
MCP1 INT Pin
IDSEL
CLOCK
REQ# / GNT#
PCI Slot
PIRQA
AD17
PCICLK 0
REQ#0 / GNT#0
Mini PCI Slot
PIRQB
AD18
PCICLK 1
REQ#1 / GNT#1
LAN1
PIRQC
AD21
CLKLAN 1
REQ#2 / GNT#2
LAN2
PIRQD
AD22
CLKLAN 2
REQ#3 / GNT#3
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