CS3423 Operating Systems

This repository contains CS3423 Operating Systems coursework, encompassing:

• Weekly Review: Weekly review questions covering topics taught in lectures, along with additional programming tasks.
• Project Checkpoints: Step-by-step final project checkpoints implementing a threads package and interacting with peripheral devices on the EdSim51 simulator, including a Dinosaur game.
• Dinosaur Game on EdSim51: A dinosaur game playable by pressing on the keypad.

Requirements

• EdSim51 Simulator (available for free at edsim51.com)
• SDCC for EdSim51 (available for free at sdcc.sourceforge.net)

Weekly Review

Weekly review questions on topics covered in lectures, along with additional programming tasks in languages such as C and Python. Answers to these questions are compiled into Markdown files provided in the weeklyreview/ directory. The write-up solutions are not guaranteed to be correct; use them at your own risk.

Project Checkpoints

• checkpoint1/ implements a single-buffer producer-consumer problem with a cooperative threads package where threads yield CPU control to other threads.
• checkpoint2/ implements a single-buffer producer-consumer problem with a preemptive threads package where threads are interrupted by timer interrupts and context switched to other threads.
• checkpoint3/ implements a 3-deep buffer producer-consumer problem with a preemptive threads package, along with a semaphore for synchrony.
• checkpoint4/ implements a 3-deep buffer producer-consumer problem with two producers and one consumer on a preemptive threads package using a ping-pong thread scheduler for fairness.
• checkpoint5/ implements a 3-deep buffer producer-consumer problem with two producers being keypad and button bank devices, and a Dinosaur game playable by the keypad device, all on a preemptive threads package.

Usage

To run the program, ensure you meet all the listed requirements.

1. make clean to remove old files.
2. In the checkpoint directory, make all to generate a .hex file.
3. Load the .hex file into EdSim51.
4. Assemble the .hex file by tapping the Assm button.
5. Run the program by tapping the Run button.

Demo GIF