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There are a number of common ways of acknowledging an interrupt has completed when an EOI is issued. These include specifying which interrupt completed, using an implied interrupt which has completed (usually the highest priority pending in the ISR), and treating interrupt acknowledgement as the EOI.
==Well-known
One of the best known PICs, the [[Intel 8259|8259A]], was included in the [[x86 architecture|x86]] PC. In modern times, this is not included as a separate chip in an x86 PC. Rather, its function is included as part of the motherboard's [[Southbridge (computing)|southbridge]] chipset. In other cases, it has been
==More information==
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