Interrupts; Table 23. Interrupts - Lenovo Aptiva Product Manual

Aptiva S Series 1G Product Guide

Interrupts

Table 23. Interrupts
IRQ System Resource
NMI I/O channel check
0 Reserved, interval timer
1 Reserved, keyboard buffer full
2 Reserved, cascade interrupt from slave PIC
3 COM2* (user available if COM2 is not present)
4 COM1*
5 LPT2 (Plug and Play option) / audio / user available
6 Diskette drive controller
7 LPT1*
8 Real time clock
9 User available
10 User available
11 User available
12 Onboard mouse port (if present, else user available)
13 Reserved, math coprocessor
14 Primary IDE (if present, else user available)
15 Secondary IDE (if present, else user available)
* Default, but can be changed to another IRQ.
66