8 System Resources

In APIC mode:

IRQ #

Used For

Available

Available for PCI

Comment

0

 

 

Timer0

 

No

 

No

 

 

 

 

1

 

 

Keyboard

 

 

No

 

 

No

 

 

 

 

 

2

 

 

Slave 8259

 

 

No

 

 

No

 

 

 

 

3

 

 

COM2

 

 

No

 

 

Yes

 

Note (1)

 

 

4

 

 

COM1

 

 

No

 

 

Yes

 

 

Note (1)

 

5

 

 

PCI/LPT2

 

Yes

 

Yes

 

Note (2)

 

6

 

 

Floppy Drive

 

No

 

 

Yes

 

 

Note (1)

 

 

 

 

Controller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

LPT1

 

 

No

 

 

Yes

 

 

Note (1)

 

8

 

 

RTC

 

No

 

No

 

 

 

9

 

 

SCI

 

No

 

No

 

System Control Interrupt (3)

 

10

 

 

COM3

 

 

Yes

 

 

Yes

 

 

Note (2)

 

11

 

 

COM4

 

Yes

 

Yes

 

Note (2)

12

 

 

PS/2 Mouse

 

No

 

Yes

 

Note (1)

 

13

 

 

FPU

 

 

No

 

 

No

 

 

 

 

14

 

 

IDE0

 

No

 

No

 

 

 

15

 

 

SATA

 

No

 

No

 

Note (3)

 

16

 

 

PIRQ[A]

 

 

For PCI

 

 

 

 

 

PCI IRQ line 1 + USB UHCI controller #0 + Graphics

 

 

 

 

 

 

 

 

 

 

 

controller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

17

 

 

PIRQ[B]

 

 

For PCI

 

 

 

 

 

PCI IRQ line 2 + AC97 Audio controller + USB UHCI

 

 

 

 

 

 

 

 

 

 

controller #1

 

 

 

 

 

 

 

 

 

 

 

 

 

18

 

 

PIRQ[C]

 

For PCI

 

 

 

 

PCI IRQ line 3 + USB UHCI controller #2 + Native IDE

 

19

 

 

PIRQ[D]

 

 

For PCI

 

 

 

 

 

PCI IRQ line 4 + USB UHCI controller #3

 

20

 

 

PIRQ[E]

 

No

 

 

 

 

Lan Controller

21

 

 

PIRQ[F]

 

No

 

 

 

 

 

 

 

22

 

 

PIRQ[G]

 

 

No

 

 

 

 

 

 

 

23

 

 

PIRQ[H]

 

No

 

 

 

 

USB EHCI controller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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.

 

 

 

 

Warning: The ETX®-CD is always booting in PIC mode. This might lead to the fact, that there are no interrupts for PCI devices available when all onboard and SuperI/O interfaces are enabled. Then the system stops without booting. The only solution is to deactivate interfaces.

8.2Direct Memory Access (DMA) Channels

DMA #

Used for

Available

Comment

 

0

 

 

 

 

 

Yes

 

 

 

1

 

 

 

 

 

Yes

 

 

 

2

 

 

FDC

 

 

No

 

 

If the “used-for” device is disabled in setup, the corresponding DMA channel is

 

 

 

 

 

 

 

available for other devices.

 

 

 

 

 

 

 

 

 

 

 

3

 

 

LPT

 

 

Yes

 

 

Unavailable if LPT is used in ECP mode.

4

 

 

Cascade

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

Kontron User's Guide ETX CD

51

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Image 51
Intel ETX CD manual Direct Memory Access DMA Channels, Apic mode, Used For Available Available for PCI Comment