Publication No. HRMCP9 Rev. B
Resources 51
6.3 Interrupts
The interrupt routing for standard components such as COM1/2 or LPT1 is in
compliance with standard PC/AT systems. Unused interrupts can be used for add-on
cards or other board specific PCI devices such as SCSI and Ethernet.
Table 6-3 Interrupt Assignments
Hardware IRQ
IRQ Source
INTC1
IRQ00
System Timer
IRQ01
Keyboard
IRQ02
Cascade from INTC2
IRQ03
COM2 / COM1
a
IRQ04
COM1 / COM2
a
IRQ05
LPT1
a
/ PnP/PCI
b
IRQ06
Floppy Disk Controller
IRQ07
LPT1
a
/ PnP/PCI
b
INTC2
IRQ08
Real Time Clock
IRQ09
Power Management Contr./PCI
b
IRQ10
PnP/PCI
b
IRQ11
PnP/PCI
b
IRQ12
PS/2 Mouse
c
IRQ13
Numeric Coprocessor
IRQ14
Rear EIDE
d
IRQ15
Onboard EIDE
e
NMI
Parity Error,
ECC Error,
System Error
a
This interrupt is available when no Interrupt Service Routine is installed.
b
Interrupts are available for Plug and Play PCI devices
c
This interrupt is available when PS/2 mouse is not connected.
d
This interrupt is available when the primary EIDE is disabled in SETUP.
e
This interrupt is available when the secondary EIDE is disabled in SETUP.