Interrupt Assignments - Asus P5MT-MX C User Manual

2.5.3

Interrupt assignments

Standard interrupt assignments
IRQ Priority
0
1
2 —
3 11
4 12
5 13
6 14
7 15
8
9
10
11
12
13
14
15 10
* These IRQs are usually available for ISA or PCI devices.
PCI Bus Number, IDSEL, and IRQ assignments
Description
PCI slot 1
PCI slot 2
PCI E x16 slot
PCI E x 8 slot
Onboard USB controller 0
Onboard USB controller 1
Onboard USB controller 2
Onboard USB controller 3
USB 2.0 EHCI controller
Onboard IDE port
Onboard SATA port
Onboard Graphics Controller
SMBus Controller
Onboard LAN
When using PCI cards on shared slots, ensure that the drivers support
"Share IRQ" or that the cards do not need IRQ assignments; otherwise,
conflicts will arise between the two PCI groups, making the system
unstable and the card inoperable.
ASUS P5MT-MX/C
Standard Function
1 System Timer
2 Keyboard Controller
Re-direct to IRQ #9
Communications Port (COM2)*
Communications Port (COM1)*
IRQ holder for PCI steering*
Floppy Disk Controller
Printer Port (LPT1)*
3 System CMOS/Real Time Clock
4 IRQ holder for PCI steering*
5 IRQ holder for PCI steering*
6 IRQ holder for PCI steering*
7 PS/2 Compatible Mouse Port*
8 Numeric Data Processor
9 Primary IDE Channel
Secondary IDE Channel
INTA
PIRQE#
PIRQG# PIRQH#
PIRQA# PIRQB#
PIRQA# PIRQB#
PIRQA#
PIRQA#
PIRQC#
PIRQE#
PIRQB#
INTB INTC INTD
PIRQF# PIRQG# PIRQH#
PIRQE# PIRQF#
PIRQC# PIRQD#
PIRQC# PIRQD#
PIRQB#
PIRQC#
PIRQD#
PIRQD#
PIRQD#
REQ# GNT#
REQ0# GNT0#
REQ1# GNT1#
REQ2# GNT2#
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