Jetway 915GCP user manual download

For Devices:Jetway 915GCP   and 1 more
Languages:English
Pages:53
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Page 23 of 53
20
2-5-2
Assigning IRQs For Expansion Card
Some expansion cards need an IRQ to operate.
Generally, an IRQ must exclusively assign to
one use.
In a standard design, there are 16 IRQs available but most of them are already in use.
Standard Interrupt Assignments
IRQ
Priority
Standard function
0
N/A
System Timer
1
N/A
Keyboard Controller
2
N/A
Programmable Interrupt
3 *
8
Communications Port (COM2)
4 *
9
Communications Port (COM1)
5 *
6
Sound Card (sometimes LPT2)
6 *
11
Floppy Disk Controller
7 *
7
Printer Port (LPT1)
8
N/A
System CMOS/Real Time Clock
9 *
10
ACPI Mode when enabled
10 *
3
IRQ Holder for PCI Steering
11 *
2
IRQ Holder for PCI Steering
12 *
4
PS/2 Compatible Mouse Port
13
N/A
Numeric Data Processor
14 *
5
Primary IDE Channel
15 *
1
Secondary IDE Channel
* These IRQs are usually available for ISA or PCI devices.
2-5-3
Interrupt Request Table For This Motherboard
Interrupt request are shared as shown the table below:
INT A
INT B
INT C
INT D
INT E
INT F
INT G
INT H
Slot 1
Slot 2
Slot 3
Slot 4
Onboard VGA
Onboard LAN
Onboard USB 1
Onboard USB 2
Onboard USB 3
Sound
IMPORTANT!
If using PCI cards on shared slots, make sure that the drivers support
“Shared IRQ” or that the cards don’t need IRQ assignments. Conflicts will
arise between the two PCI groups that will make the system unstable or
cards inoperable.
Sample