Interrupt Nesting: In this method, the I/O device is organized in a priority structure. Therefore, an interrupt request from a higher priority device is recognized whereas a request from a lower priority device is not. The processor accepts interrupts only from devices/processes having priority.

The typical two approaches are: sequentialinterrupt processing- by disabling interrupt request while an interrupt is being processed,all interrupts will be processed sequentially (usually PSW contains a bit for this purpose);nested interrupt processing- all the interrupts may be assigned different priorities, so thatwhenever an interrupt occurs while an interrupt handler is running, their priorities will becompared first, and the...