Intel 281809-003 manual Appendix F − Interrupts & DMA Channels, System Resource, Data Width

Appendix F − Interrupts & DMA Channels

IRQ

NMI

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

System Resource

I/O Channel Check

Reserved, Interval Timer

Reserved, Keyboard buffer full

Reserved, Cascade interrupt from slave PIC

Serial Port 2

Serial Port 1

Audio

Floppy

Parallel Port 1

Real Time Clock

User available

User available

Audio

Onboard Mouse Port

Reserved, Math coprocessor

Primary IDE

Secondary IDE if present, else user available

Table F-1. Advanced/RH Interrupts

DMA	Data Width	System Resource
0	8- or 16-bits	Audio
1	8- or 16-bits	Audio
2	8- or 16-bits	Floppy
3	8- or 16-bits	Parallel Port (for ECP/EPP Config.)
4		Reserved - Cascade channel
5	16-bits	Open
6	16-bits	Open
7	16-bits	Open

Table F-2. Advanced/RH DMA Map

Advanced/RH Technical Product Specification ∙ Page 31