32 VMIVME-7805/VME-7805RC Hardware Reference Manual
2.6 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 ICH2. This mapping is illustrated in
Figure 2-1 on page 33 and is defined in Table 2-5.
The device PCI interrupt lines (INTA through INTH) that are present on each
device cannot be modified.
Table 2-5 PCI Device Interrupt Mapping by the BIOS
Device
Component
Vendor
ID
Device
ID
CPU Address
Map ID Select
PCI IRQ
Arbitration
Request Line
PCI-to-VME Bridge
Tundra Universe IIB
0x10E3
0x0000
AD19
INTA
REQ0
Timer/SRAM FPGA
GE Proprietary
0x114A
0x0004
AD20
INTE
N/A
PMC
N/A
N/A
N/A
AD31
INTC
REQ2
Ethernet Controller
Intel 82540EM*
Intel 82541PI
0x8086
0x100E
0x1076
AD22
INTB
REQ1
PCI Host Bridge
GMCH
0x8086
0x3580
N/A
N/A
N/A
Memory Controller
GMCH
0x8086
0x3584
N/A
N/A
N/A
Configuration and
Process
GMCH
0x8086
0x3585
N/A
N/A
N/A
Integrated
Graphics
GMCH
0x8086
0x3582
N/A
N/A
N/A
PCI-LPC Bridge
ICH4-M
0x8086
0x24CC
N/A
N/A
N/A
USB VHCI
Controller
ICH4-M
0x8086
0x24C2
N/A
N/A
N/A
SMBus Controller
ICH4-M
0x8086
0x24C3
N/A
N/A
N/A
LAN Controller
ICH4-M
0x8086
0x10E3
N/A
N/A
N/A
USB VHCI
Controller
ICH4-M
0x8086
0x24CD
N/A
N/A
N/A
PCI-to-Hub Bridge
ICH4-M
0x8086
0x2448
N/A
N/A
N/A
*Intel 82540EM for VMIVME-7805 or Intel 82541PI for VME-7805RC.