1. How does the processor know which device has requested an interrupt? 2. What instructions are needed to implement interruptible interrupts? Explain the function and purpose of each along with an...

1. How does the processor know which device has requested an interrupt?

2. What instructions are needed to implement interruptible interrupts? Explain the function and purpose of each along with an explanation of what would happen if you didn't have them.

3. In the following interrupt handler code select the ONES THAT DO NOT BELONG.

_______ disable interrupts;

_______ save PC;

_______ save $k0;

_______ enable interrupts;

_______ save processor registers;

_______ execute device code;

_______ restore processor registers;

_______ disable interrupts;

_______ restore $k0;

_______ disable interrupts;

_______ restore PC;

_______ enable interrupts;

_______ return from interrupt;