77
NuPRO-E72
Note: A read to this address will subtractively go to PCI, where it will master abort.
C.4 Interrupt Request (IRQ) Lines
IRQ Lines PIC Mode
Table C-4: IRQ Lines PIC Mode
Notes:
(1) These IRQs can be used for PCI devices when the onboard device
is disabled. If the IRQ is from ISA, the user must reserve the IRQ for
ISA in the BIOS setup menu.
(2) The BIOS does not open the IRQ 9 setting for the ISA bus.
IRQ#
Typical Interrupt
Resource
Connected to Pin
Available
0
Counter 0
N/A
No
1
Keyboard controller
N/A
No
2
Cascade interrupt from
slave PIC
N/A
No
3
Serial Port 2 (COM2)
IRQ3 via SERIRQ, IRQ3
at ISA bus
Note (1)
4
Serial Port 1 (COM1) /
PCI / ISA
IRQ4 via SERIRQ, IRQ4
at ISA bus
Note (1)
5
PCI / ISA
IRQ5 via SERIRQ, IRQ5
at ISA bus
Note (1)
6
N/A
N/A
No
7
PCI / ISA
IRQ7 via SERIRQ, IRQ7
at ISA bus
Note (1)
8
Real-time clock
N/A
No
9
SCI / PCI
IRQ9 via SERIRQ, IRQ9
at ISA bus
Note (1), (2)
10
PCI / ISA
N/A
No
11
PCI / ISA
N/A
No
12
PS/2 Mouse / PCI / ISA
IRQ12 via SERIRQ,
IRQ12 at ISA bus
Note (1)
13
Math Processor
N/A
No
14
Primary IDE controller /
PCI / ISA
IRQ14 via SERIRQ,
IRQ14 at ISA bus
Note (1)
15
PCI / ISA
N/A
No
Summary of Contents for NuPRO-E72
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