IRQ8

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IRQ8

IRQ Number:
8
16-Bit Priority:
3
Bus Line:
No
Typical Default Use:
Real-time clock.
Other Common Uses:
None; for system use only.
Description:
This is the reserved interrupt for the real-time clock timer. This timer is used by software programs to manage events that must be calibrated to real-world time; this is done by setting "alarms", which trigger this interrupt at a specified time. For example, if you are using an electronic datebook and have it set to pop up screen messages or beep the PC when it is time for a meeting, the software will set a timer to count down to the appropriate time. When the timer finishes its countdown, an interrupt will be generated on IRQ8.
Conflicts:
This is a dedicated interrupt line; there should never be any conflicts. If software indicates a conflict on this IRQ, there is a good possibility of a hardware problem somewhere on your system board.

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