APPENDIX
IB704 User’s Manual
43
B. Interrupt Request Lines (IRQ)
Peripheral devices use interrupt request lines to notify CPU for the
service required. The following table shows the IRQ used by the devices
on board.
Level
Function
IRQ0
System Timer Output
IRQ1
Keyboard
IRQ2
PIC2 (IRQ8-15)
IRQ3
Serial Port #2
IRQ4
Serial Port #1
IRQ5
For PCI
IRQ6
Floppy Disk Controller
IRQ7
Parallel Port #1
IRQ8
Real Time Clock
IRQ9
For PCI
IRQ10
For PCI
IRQ11
For PCI
IRQ12
PS/2 Mouse
IRQ13
Coprocessor
IRQ14
Primary IDE
Summary of Contents for IB704
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