Chapter 3
Hardware
16
Reference Manual
CoreModule 740
Interrupt Channel Assignments
The interrupt channel assignments are shown in
.
Legend:
D = Default, O = Optional, X = Fixed
Table 3-1. Interrupt Channel Assignments
Device vs IRQ No.
0
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
Timer X
Keyboard
X
Secondary Cascade
X
COM1
O D
COM2
D O
Floppy
D
Parallel
O
D
RTC
X
IDE
D
Math Coprocessor
X
PS/2 Mouse
X
PCI INTA
Automatically Assigned
PCI INTB
Automatically Assigned
PCI INTC
Automatically Assigned
PCI INTD
Automatically Assigned
USB
Automatically Assigned
Video
Automatically Assigned
NOTE
The IRQs for USB and Video are automatically assigned by the BIOS Plug and
Play logic. Local IRQs assigned during initialization can not be used by external
devices.