Specifications
| Table |
| System Interrupts |
|
|
Hardware IRQ | System Function |
|
|
IRQ0 | System timer |
|
|
IRQ1 | Keyboard controller |
|
|
IRQ2 | Cascaded |
|
|
IRQ3 | COM2 |
|
|
IRQ4 | COM1 |
|
|
IRQ5 | Audio (default)* |
|
|
IRQ6 | Diskette drive |
|
|
IRQ7 | Parallel port |
|
|
IRQ8 | Real time clock (RTC) |
|
|
IRQ9 | Infrared |
|
|
IRQ10 | System use |
|
|
IRQ11 | System use |
|
|
IRQ12 | Internal point stick or external mouse |
|
|
IRQ13 | Coprocessor (not available to any peripheral) |
|
|
IRQ14 | IDE interface (hard drive and optical drive) |
|
|
IRQ15 | System use |
✎PC Cards may assert IRQ3, IRQ4, IRQ5, IRQ7, IRQ9, IRQ10, IRQ11, or IRQ15. Either the infrared or the serial port may assert IRQ3 or IRQ4.
*Default configuration; audio possible configurations are IRQ5, IRQ7, IRQ9, IRQ10, or none.
Maintenance and Service Guide |