Writing a Simple Operating System - from Scratch

About

This repo is a collection of code used for working through the book Writing a Simple Operating System —from Scratch by Nick Blundell. It contains the example programs (Figures) and my solutions for the questions.

Running the code

To assemble the code run the command nasm <filename> -f bin -o <output_name>.bin. Then to execute the program run qemu-system-i386 <output_name>.bin.

Chapters

Chapter 1

Chapter 2

Chapter 3

• A simple boot sector (Figure 3.1)
• Hello world (Figure 3.2)
• Addressing demonstration (Figure 3.5)
• Manipulating the stack (Figure 3.6)
• Making the first function call
• Manipulating the data register (Figure 3.7)

Questions (Solutions)

• Question 3
• Question 4
• Question 5