Software • BIOS options
Section 4
Software
327Automation PC 620 with 945GME N270 CPU board User's Manual V 1.10
1.11.5 Interrupt assignments in APIC mode
A total of 23 IRQs are available in the APIC mode (Advanced Programmable Interrupt
Controller). The activation of this option is only effective if it takes place before the operating
system (Windows XP) is activated. There are then 23 IRQs available.
IRQ
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
NMI
NONE
System timer ●
Keyboard ●
IRQ cascade ●
COM1 (Serial port
A)
❍●
COM2 (Serial port
B)
●❍
LPT1 ❍❍❍❍❍ ❍❍❍❍ ❍ ●
LPT2 ❍❍❍❍❍ ❍❍❍❍ ❍ ●
PS/2 mouse ●
ACPI
1)
●
FDD ● ❍
Real-time clock ●
Coprocessor
(FPU)
●
Primary IDE
channel
●
Secondary IDE
channel
❍
B&R
COM3
(COM C)
❍❍❍ ❍ ❍❍❍ ●
COM4
(COM D)
❍❍❍ ❍ ❍❍❍ ●
COM5
(COM E)
❍❍❍ ❍ ❍❍❍ ●
CAN ❍❍●
PIRQ A
2)
●
PIRQ B
3)
●
PIRQ C
4)
●
PIRQ D
5)
●
PIRQ E
6)
●
PIRQ F
7)
●
PIRQ G
8)
●
PIRQ H
9)
●
Table 219: IRQ interrupt assignments in APIC mode