Computers as Components, 2nd Edition

Lab Exercises 207

Q4-26 If an interrupt handler executes for too long and the next interrupt occurs

before the last call to the handler has finished, what happens?

Q4-27 Consider a system in which an interrupt handler passes on samples to an

FIR filter program that runs in the background.

a. If the interrupt handler takes too long, how does the FIR filter’s output

change?

b. If the FIR filter code takes too long, how does its output change?

Q4-28 Assume that your microprocessor implements an ICE instr uction that asserts

a bus signal that causes a microprocessor in-circuit emulator to start. Also

assume that the microprocessor allows all internal registers ...