B.15 DMA Channel Assignments

Table B-15: DMA channel assignments

Channel Function

1Available

2Floppy disk (8-bit transfer)

3Available

4Cascade for DMA controller 1

5Available

6Available

7Available

B.16 Interrupt Assignments

Table B-16: Interrupt assignments

Priority

Interrupt#

Interrupt source

1

NMI

Parity error detected

2

IRQ 0

Interval timer

 

 

 

3

IRQ 1

Keyboard

 

 

 

-

IRQ 2

Interrupt from controller 2 (cascade)

 

 

 

4

IRQ 8

Real-time clock

5

IRQ 9

Cascaded to INT 0A (IRQ 2)

 

 

 

6

IRQ 10

Available

 

 

 

7

IRQ 11

Available

 

 

 

8

IRQ 12

PS/2 mouse

9

IRQ 13

INT from co-processor

 

 

 

10

IRQ 14

Fixed disk controller

 

 

 

11

IRQ 15

Available

 

 

 

12

IRQ 3

Serial communication port 2

 

 

 

13

IRQ 4

Serial communication port 1

 

 

 

14

IRQ 5

Parallel port 2

 

 

 

15

IRQ 6

Diskette controller (FDC)

16

IRQ 7

Parallel port 1 (print port)

 

 

 

72PCA-6275 User's Manual

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Advantech PCA-6275 manual DMA Channel Assignments, Interrupt Assignments