Computers as Components, 2nd Edition

352 CHAPTER 6 Processes and Operating Systems

LAB EXERCISES

L6-1 Using your favor ite operating system, write code to spawn a process that

writes “Hello, world” to the screen or flashes an LED, depending on your

available output devices.

L6-2 Build a small serial por t device that lights LEDs based on the last character

written to the serial port. Create a process that will light LEDs based on

keyboard input.

L6-3 Write a driver for an I/O device.

L6-4 Write context switch code for your favorite CPU.

L6-5 Measure context switching overhead on an operating system.

L6-6 Using a CPU that runs an operating system that uses RMS, try to get the CPU

utilization ...