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APPENDIX
MI985 User’s Manual
63
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
IRQ3
Communications Port (COM2)
IRQ4
Communications Port (COM1)
IRQ8
System CMOS/real time clock
IRQ13
Numeric data processor
IRQ22
High Definition Audio Controller
Summary of Contents for MI985
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