For the daisy chain scheme of connecting I/O devices, which of the following statements is true?
Daisy chaining approach tells the processor in which order the interrupt should be handled by providing priority to the devices. In daisy-chaining method, all the devices are connected in serial. The device with the highest priority is placed in the first position, followed by lower priority devices. The interrupt pin is common to all. So answer is option (A).
VAD – Vector Address
PI(P1) – Priority In
PO(P0) – Priority Out
Source: https://www.geeksforgeeks.org/priority-interrupts-sw-polling-daisy-chaining/
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