D.4 IRQ mapping chart
Table
0 | Interval timer |
1 | Keyboard |
|
|
2 | Interrupt from Controller 2 |
|
|
3 | COM2 |
|
|
4 | COM1 |
|
|
5 | COM4 |
|
|
6 | FDD |
|
|
7 | LPT1 |
|
|
8 | RTC |
|
|
9 | Reserved |
|
|
10 | COM3 |
|
|
11 | Reserved (watchdog timer) |
|
|
12 | PS/2 mouse |
|
|
13 | INT from |
|
|
14 | Primary IDE |
|
|
15 | Secondary IDE (reserved for CompactFlash) |
|
|
*Ethernet interface IRQ select: 9, 11, 12, 15
*PnP USB IRQ select: 9, 11, 12, 15
*SCSI IRQ select: 9, 11, 12, 15
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