Overview

Developing a multi-threaded kernel from scratch

Preparation

Documents in this repo assume macOS on an Apple M1 chip.

> brew install nasm
> brew install qemu

Sections

1. Bootloader / Real Mode
2. Entering Protected Mode
3. Loading 32-bit kernel
4. Writing kernel in C / Interrupt Descriptor Table
5. Interrupt Descriptor Table
6. Programmable Interrupt Controller
7. Memory Management - Heap
8. Memory Management - Paging
9. File System - Disk Driver
10. File System - FAT16
11. Virtual File System
12. User Space
13. Talking with the kernel from User Space
14. Accessing the Keyboard in Protected Mode
15. ELF files
16. Writing User Programs in C
17. Shell and Launching Other User Programs

Resources

• https://wiki.osdev.org/