2 in apic mode, 2 direct memory access (dma) channels, 3 memory area – Kontron COMe-cPC2 User Manual
Page 53: In apic mode, Direct memory access (dma) channels, Memory area, Come-cpc2 / system resources
COMe-cPC2 / System Resources
4.1.2
In APIC mode
IRQ#
Used For
Available
Comment
0
Timer 0
No
-
1
Keyboard
No
-
2
Slave 8259
No
-
3
-
Yes
Note (4)
4
-
Yes
Note (4)
5
-
Yes
Note (4)
6
-
Yes
Note (4)
7
-
Yes
Note (4)
8
RTC
No
-
9
SCI
No
Note (2)
10
-
Yes
Note (4)
11
-
Yes
Note (4)
12
-
Yes
Note (4)
13
FPU
No
-
14
IDE0
No
Note (1)(3)
15
IDE1
No
Note (1)(3)
16
PIRQ[A]
For PCI
PCI IRQ line 1 + Graphics controller + HD Audio Controller + secondary IDE Note (4)
17
PIRQ[B]
For PCI
PCI IRQ line 2 + HD Audio controller Note (4)
18
PIRQ[C]
For PCI
PCI IRQ line 3 + USB UCHI controller #3 + SATA (native mode) Note (4)
19
PIRQ[D]
For PCI
PCI IRQ line 4 + USB UCHI controller #2 + IDE (native mode) Note (4)
20
PIRQ[E]
No
Lan Controller Note (4)
21
PIRQ[F]
No
Note (4)
22
PIRQ[G]
No
Note (4)
23
PIRQ[H]
No
USB EHCI controller, USB UCHI controller #1 Note (4)
1 If the “Used For” device is disabled in setup, the corresponding interrupt is available for
other devices.
2 Unavailable in Advanced Configuration and Power Interface (ACPI) mode. Used as System
Control Interrupt (SCI) in ACPI mode. Currently not free in Non-ACPI mode.
3 IRQs are available if IDE controller is either disabled in setup or if in Native IDE mode.
4 ACPI Operating System decides on particular IRQ usage.
4.2
Direct Memory Access (DMA) Channels
DMA#
Used For
Available
Comment
0
-
No
-
1
-
No
-
2
-
No
-
3
-
No
-
4
Cascade
No
-
5
-
No
-
6
-
No
-
7
-
No
-
4.3
Memory Area
Upper Memory
Used For
Available
Comment
C0000h-CFFFFh
VGA BIOS
No
-
D0000h-DFFFFh
-
Yes
LPC Bus or Shadow RAM
E0000h-EFFFFh
System BIOS
No
-
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