8 System Resources

8 System Resources

8.1Interrupt Request (IRQ) Lines

In 8259 PIC mode:

IRQ #

Used For

Available

Comment

0

Timer0

No

 

1

Keyboard

No

 

2

Slave 8259

No

 

3

COM2

No

Note (1)

4

COM1

No

Note (1)

5

LPT2

Yes

Note (2)

6

Floppy Drive Controller

No

Note (1)

7

LPT1

No

Note (1)

8

RTC

No

 

9

SCI

No

 

10

COM3

Yes

Note (2)

11

COM4

Yes

Note (2)

12

PS/2 Mouse

No

Note (1)

13

FPU

No

 

14

IDE0

No

Note (1)

15

SATA

No

Note (3)

 

 

 

 

Note:

1 If the “Used For” device is disabled in setup, the corresponding interrupt is available for other devices.

 

2 Unavailable if baseboard is equipped with an I/O controller SMC FDC37C669, and the device is enabled in

 

setup.

 

3 Unavailable in SATA legacy mode. It cannot be used for PCI, but for ISA bus, when SATA is in enhanced

 

mode.

 

 

Kontron User's Guide ETX CD

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Intel ETX CD manual System Resources, Interrupt Request IRQ Lines, PIC mode