About embedded system interrupt question

List the shadow registers in various interrupt modes. What are the main difference between normal subroutine calls and interrupt routine calls? In The Nested Vectored Interrupt Controller (NVIC) offers very fast interrupt handling and provides the vector table as a set of real vectors (addresses). Is the following statement correct? List the interrupt handler names defined for the following interrupts in NVIC. System timer ADC interrupt USARTI interrupt In the following program, how long (in ms) does it take for msTicks to increase by one? Assume the internal clock 8Mhz is used. State how to enable an interrupt by a NVIC function. What is the difference between the following two statements? NVIC ISER [1] = (1