B-8 Specifications
INTERRUPT CONTROLLERS
Using interrupts, hardware can request software services. If non-Plug and
Play software is being used, the interrupt may need to be moved for software
application or driver compatibility. Some interrupts cannot be moved. Fif-
teen interrupts can be used with a cascade connection of 8259INTC x 2. The
table shows default interrupt level assignments 0 through 15, in order of de-
creasing priority.
Controller
Master/Slave
Priority Name
Device
Master
0
IRQ00
SystemTimer 1
Master
1
IRQ01
Keyboard
Master
2
IRQ02
Programmable Controller
Slave
3
IRQ08
Real-time Clock
Slave
4
IRQ09
Infrared Port
Slave
5
IRQ10
USB Port
Slave
6
IRQ11
PC Card Bus Controller
Slave
7
IRQ12
PS/2 Mouse
Slave
8
IRQ13
Math Coprocessor (built into
CPU)
Slave
9
IRQ14
Hard Disk Controller 1
Slave
10
IRQ15
IDE DS/MD6000 or PC Card in
MD 6000
Master
11
IRQ03
Not used, available
Master
12
IRQ04
Serial Port
Master
13
IRQ05
Sound
Master
14
IRQ06
Diskette Drive Controller
Master
15
IRQ07
Parallel Port
Summary of Contents for V6220
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