56 Maintaining and Troubleshooting Your Solo Notebook
Port/IRQ Configurations
Your notebook supports the use of multiple peripheral devices. By default, your
system has two free IRQs (normally IRQ 10 and 11). 16-bit and 32-bit devices (PC
Cards) cannot share the same interrupt. The IRQs that may be used by normal 16-
bit PC Cards are 3, 4, 5, 7, 10 and 11. IRQ 9 is not available for 16-bit PC Cards
because they are reserved as PCI style interrupts for USB and 32-bit Cardbus PC
Cards.
Solo notebook interrupts (IRQs)
Use this information to help determine which IRQ(s) to disable if you need to free-
up resources for a new device.
5100 IRQs
Device use
0
System timer
1
Keyboard
2
Programmable interrupt controller
3
IR port (COM2) - shipped disabled
4
Serial communications port (COM1)
5
Sound
6
Floppy disk controller
7
Parallel port (printer)
8
System CMOS/Real time clock
9
USB - IRQ holder (32-bit PCI style IRQ)
CardBus - (32-bit PCI style IRQ)
10
Free
11
Free
12
Touchpad (mouse)
13
Numeric data processor
14
Hard disk
15
CD-ROM drive
