
APPENDIX
70
IB970 User’s Manual
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
IRQ3
Serial Port #2
IRQ4
Serial Port #1
IRQ8
Real Time Clock
IRQ14
Primary IDE
IRQ15
Secondary IDE
Содержание IB970
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