Specifications B-7
INTERRUPT CONTROLLERS
The following table shows default interrupt level assign-
ments 0 through 15.
IRQ#*
PRIORITY**
DEVICE
IRQ00
0
System Timer
IRQ01
1
Keyboard
IRQ02
2
Programmable Interrupt Controller
IRQ03
11
Modem (FIR, if modem installed)
IRQ04
12
COM 1 (Serial Port)
IRQ05
13
Audio Board
IRQ06
14
Floppy Diskette Controller
IRQ07
15
ECP LPT1 (Parallel Port)
IRQ08
3
RTC Alarm
IRQ09
4
Available for PCMCIA or FIR
IRQ10
5
Available for PCMCIA or FIR
IRQ11
6
USB
IRQ12
7
PS/2 Mouse
IRQ13
8
FPU
IRQ14
9
Hard Disk Drive
IRQ15
10
CD-ROM
*IRQs 00 through 07 are serviced by the Master controller;
08 through 15 are serviced by the Slave controller.
**The lower the priority number, the higher the priority level.