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Interrupt Wiring: General Structure

Receiving device: Keep interrupt enabled: device interrupts when data ready.

Transmit device: Enable interrupt when s/w output queue non-empty: device interrupts when h/w output queue has space.

Enhancement: Vectored interrupt directs processor PC to correct device handler, sorting according to priority.

19: (C) 2008-13, DJ Greaves, University of Cambridge, Computer Laboratory.