Interrupt Requests (Irqs; Interrupt Assignments - NEC DIRECTION L Manual

Interrupt Requests (IRQs)

IRQ
NMI I/O channel check
0
1
2
3
4
5
6
7
8
9
10*
11*
12
13
14
15
*Default, but can be changed to another IRQ

Interrupt Assignments

NORMAL ASSIGNMENT
Reserved, interval timer
Reserved, keyboard buffer
Reserved, cascade interrupt from slave PIC
COM2*
COM1*
LPT2 (Plug and Play option) / audio /user
available
Floppy Drive
Parallel Port 1 (LPT1)*
Real time clock
User available
User available / USB
Windows Sound System*/user available
On-board mouse port if mouse is present; else is
user available
Reserved, math coprocessor
Primary IDE channel
Secondary IDE channel or else user-available
System Specifications C-11