MSI E7230 User Guide - Page 37
PCI Interrupt Request Routing
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Hardware Setup 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 PCI Slot 1 PCI Slot 2 PCI Slot 3 VGA ICH INT Pin INT# F/G/H/E INT# G/H/E/F INT# H/E/F/G INT# A IDSEL AD21 AD22 AD23 AD16 CLOCK CK_PCI 0 CK_PCI 1 CK_PCI 2 CK_VGA REQ / GNT REQ#1/ GNT#1 REQ#2/ GNT#2 REQ#3/ GNT#3 REQ#0/ GNT#0 2-23
2-23
Hardware Setup
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
ICH INT Pin
IDSEL
CLOCK
REQ / GNT
PCI Slot 1
INT# F/G/H/E
AD21
CK_PCI 0
REQ#1/ GNT#1
PCI Slot 2
INT# G/H/E/F
AD22
CK_PCI 1
REQ#2/ GNT#2
PCI Slot 3
INT# H/E/F/G
AD23
CK_PCI 2
REQ#3/ GNT#3
VGA
INT# A
AD16
CK_VGA
REQ#0/ GNT#0