Describe the difference between polling and interrupts.

$2.$ Describe the difference between polled interrupts and vectored interrupts.

$3.$ List at least $5$ tasks that an Interrupt System must perform.

$4.$ Described how the HCS$12$ MCU uses a vector to find the correct interrupt service

routine after an interrupt occurs.

$5.$ What advantage does a vectored interrupt system have over a polled interrupt system?

$6.$ Why are interrupts disabled during execution of an ISR?

$7.$ How does HCS$12$ manage multiple sources of interrupts?

$8.$ How does HCS$12$ transfer control to the correct ISR for a particular interrupt $?$

$9.$ Why does HCS$12$ automatically push all registers on the stack before transferring

control to an SIR?

$10.$ What happens when SEI instruction is executed?

$11.$ What happens when CLI instruction is executed?

$12.$ How are Interrupts are masked when the HCS$12$ loads the PC with ISR$$s address?

$13.$ How are Interrupts unmasked when the ISR terminates?

$14.$ What is the difference between an interrupt mask bit and a local interrupt enable bit?

$15.$ How many bytes are pushed onto the stack when the HCS$12$ processes an IRQ?

$16.$ Define interrupt latency and cite at least two components that cause interrupt latency?

$17.$ Describe the operation of the last instruction exec