Standard Features 41
PCI Device
Interrupt Map
The PCI bus-based external devices include the PMC sites, Ethernet controller
and the PCI-to-VME bridge. The default BIOS maps these external devices to the
PCI Interrupt Request (PIRQx) lines of the ICH. This mapping is illustrated in
Figure 2-1 on page 42 and is defined in Table 2-5.
Table 2-5 PCI Device Interrupt Mapping by the BIOS
Device Component Vendor ID Device ID ID Select PCI IRQ
Arbitration
Request Line
PCI-to-VME Bridge Tundra Universe IID 0x10E3 0x0000 AD27 INTD REQ1
Timer/SRAM FPGA GE Proprietary 0x114A 0x0004 AD26 INTC N/A
PMC N/A N/A N/A AD24 INTA, B, C, D REQ0
Ethernet Controller Intel 82571EB 0x8086 0x105E N/A N/A N/A
PCI Host Bridge GMCH 0x8086 0x27A0 N/A N/A N/A
VGA Controller GMCH 0x8086 0x27A2 N/A N/A N/A
Integrated Graphics GMCH 0x8086 0x27A6 N/A N/A N/A
PCI-LPC Bridge ICH7-M 0x8086 0x27BD N/A N/A N/A
USB UHCI Controller ICH7-M 0x8086 0x27C8
0x27C9
0x27CA
0x27CB
N/A N/A N/A
USB EHCI ICH7-M 0x8086 0x27CC N/A N/A N/A
SMBus Controller ICH7-M 0x8086 0x27DA N/A N/A N/A
PCI-E Controller ICH7-M 0x8086 0x27D0 N/A N/A N/A
PCI-E Controller ICH7-M 0x8086 0x27E0 N/A N/A N/A
DMI-PCI Bridge ICH7-M 0x8086 0x2448 N/A N/A N/A
PCI-E Switch* PLX 8518 0x10B5 0x8518 N/A N/A N/A
PCI-E to PCI-X
Bridge*
PLX 8114 0x10B5 0x8114 N/A N/A N/A
LSI SAS Controller* LSI1064E 0x1000 0x0056 AD16 N/A N/A
PCI-E Graphics Port GMCH 0x8086 27A1 N/A N/A N/A
SATA Controller ICH7-M 0x8086 27C4 N/A N/A N/A
* Only available on V7769.
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