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COMe-cHL6 / System Resources

5 System Resources

5.1 Interrupt Request (IRQ) Lines

IRQ # Used For Available Comment

0 Timer0 No -

1 Keyboard No -

2 Cascade No -

3 COM2 No onboard UART2

4 COM1 No onboard UART1

5 SIO LPT/SD Controller Note(4) external SIO LPT/SD Controller

6 COM3 Note(4) external SIO COM1

7 COM4 Note(4) external SIO COM1

8 RTC No -

9 ACPI No -

10 - Yes -

11 - Yes -

12 PS/2 Mouse Note(4) external SIO

13 - Yes -

14 - Yes -

15 - Yes -

16 LNK A No I.G.D + SA Audio + XHCI + Intel ME + USB

EHCI2 + PCIe RP 0 + PCIe RP 4; Note(3)

17 LNK B No PCIe RP 1; Note(3)

18 LNK C No PCIe RP 2 + SMBus; Note(3)

19 LNK D No PCIe RP 3 + SATA; Note(3)

20 LNK E No Onboard LAN;Note(3)

21 LNK F No Note(3)

22 LNK G No PCH HDA;Note(3)

23 LNK H No USB EHCI#1

(1) If the “Used For” device is disabled in setup, the corresponding interrupt is available

for other device.

(2) Not available if ACPI is used

(3) ACPI OS decides on particular IRQ usage

(4) Depends on system configuration (onboard COM Port support and external SIO

presence)

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