Compaq Armada E500 Series Maintenance And Service Manual page 136

NOTES: PCMCIA 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.