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

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Image 31
Intel 281809-003 manual Appendix F − Interrupts & DMA Channels, Nmi, Data Width System Resource

281809-003 specifications

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