APPENDIX

B. Interrupt Request Lines (IRQ)

Peripheral devices use interrupt request lines to notify CPU for the service required. The following table shows the IRQ used by the devices on board.

 

Level

 

 

Function

 

 

IRQ0

 

System Timer Output

 

 

IRQ1

 

 

Keyboard

 

 

IRQ2

 

Interrupt Cascade

 

 

IRQ3

 

Serial Port #2

 

 

IRQ4

 

Serial Port #1

 

 

IRQ5

 

Reserved

 

 

IRQ6

 

Floppy Disk Controller

 

 

IRQ7

 

Parallel Port #1

 

 

IRQ8

 

Real Time Clock

 

 

IRQ9

 

Reserved

 

 

IRQ10

 

Reserved

 

 

IRQ11

 

Reserved

 

 

IRQ12

 

PS/2 Mouse

 

 

IRQ13

 

80287

 

 

IRQ14

 

Primary IDE

 

 

IRQ15

 

Secondary IDE

 

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MI910 User’s Manual

Page 62
Image 62
Intel MI910F user manual Interrupt Request Lines IRQ, Level Function