Interrupt | I/O APIC | Description |
| Level |
|
|
|
|
IRQ6 | INT6 | Diskette port |
|
|
|
IRQ7 | INT7 | Parallel port |
|
|
|
IRQ8_L | INT8 | RTC interrupt |
|
|
|
IRQ9 | INT9 | Signal control interrupt (SCI) used by |
|
| system |
|
|
|
IRQ10 | INT10 |
|
|
|
|
IRQ11 | INT11 |
|
|
|
|
IRQ12 | INT12 | Mouse interrupt |
|
|
|
IRQ13 | INT13 | |
|
|
|
IRQ14 | INT14 | Compatibility IDE interrupt from primary channel IDE devices 0 and 1 |
|
|
|
IRQ15 | INT15 |
|
|
|
|
SMI_L |
| System management interrupt - general purpose indicator sourced |
|
| through the PID to the processors |
|
|
|
DMA usage
The following table lists the direct memory access (DMA) channels that the system typically uses and which ones are available for use by
| DMA | Resource |
0 | Cascade |
|
|
1 | Available |
|
|
2 | Floppy Controller |
|
|
3 | Available |
|
|
4 | Redirect Cascade |
|
|
5 | Available |
|
|
6 | Available |
|
|
7 | Available |
|
|
120System Specifications