Intel ETX CD manual Direct Memory Access DMA Channels, Apic mode

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