Page 40
USING NON-STANDARD IRQs
To use a tablet, mouse, and modem together, configure the tablet on Com 3 with a non-standard IRQ line.
Then run WTEST to locate the tablet. The test program will search Com ports 1-4 and IRQ lines 3-5, 7,
10-12, and 15. These are the only Com ports and IRQ lines supported by the WACOM driver. The
following table lists standard IRQ settings for most computers.
The IRQs marked “Free” are usually available for devices to use freely, but this does not mean they are
always available. See your system hardware documentation for additional information.
IRQ
Status
Standard Device Assignments
0
Used
Timer
1
Used
Keyboard
2
Used
Cascade Input
3
Free
Com 2 & Com 4
4
Free
Com 1 & Com 3
5
Free
LPT2
6
Used
Floppy Disk
7
Free
LPT1
8
Used
Clock
9
Used
Redirected IRQ2
10
Free
(reserved)
11
Free
(reserved)
12
Used
PS/2 Mouse
13
Used
Co-Processor
14
Used
Hard Disk
15
Free
(reserved)