Ampro Corporation COM 830 - Manual (Page 55)

Chapter 3 Signals and Pinout Tables
COM 830 Reference Manual 49
In APIC mode, the PCI bus interrupt lines are connected with IRQ 20, 21, 22 and 23.
PCI Configuration Space Map
9 Note 2 Generic IRQ9 via SERIRQ, option for SCI
10 Yes IRQ10 via SERIRQ
11 Yes IRQ11 via SERIRQ
12 Yes IRQ12 via SERIRQ
13 No Math processor Not applicable
14 Note 1 IDE Controller 0 (IDE0) /
Generic IRQ14
15 Note 1 IDE Controller 1 (IDE1) /
Generic IRQ15
16 No PIRQA, Integrated VGA Controller, PCI
Express Root Port 1, Intel High
Definition Audio Controller (Azalia),
UHCI Host Controller 3
17 No PIRQB, AC'97 Audio, PCI Express Root
Port 2, PCI Express Root Port 6, onboard
Gigabit LAN Controller
18 No PIRQC, Parallel ATA Controller in
enhanced/native mode, UHCI Host
Controller 2, PCI Express Root Port 3
19 No PIRQD, Serial ATA controller in
enhanced/native mode, UHCI Host
Controller 1, SMBus Controller, PCI
Express Root Port 4
20 Yes PIRQE, PCI Bus INTD, option for SCI
21 Yes PIRQF, PCI Bus INTA
22 Yes PIRQG, PCI Bus INTB
23 Yes PIRQH, PCI Bus INTC, UHCI Host
Controller 0, EHCI Host Controller
NOTE If the ATA/IDE configuration is set to enhanced mode in BIOS setup (serial ATA and
parallel ATA native mode operation), IRQ14 and 15 are free for PCI/LPC bus.
In ACPI mode, IRQ9 is used for the SCI (System Control Interrupt). The SCI can be
shared with a PCI interrupt line.
Table 3-29. PCI Configuration Space Map
Bus Number
(hex) Device Number
(hex) Function Number
(hex) PCI Interrupt
Routing Description
00h 00h 00h N.A. Host Bridge
00h 01h 00h Internal PCI Express Graphics
Root Port
00h 02h 00h Internal VGA Graphics
Table 3-28. IRQ Lines in APIC mode (Continued)