之前一直想自己写一个小型的操作系统，最后还是拖了很久，依葫芦画瓢写了大概一半的OS，以下就是已完成和未完成的模块
We will want to do many things with our OS:
- Boot from scratch, without GRUB - DONE!
- Enter 32-bit mode - DONE
- Jump from Assembly to C - DONE!
- Interrupt handling - DONE!
- Screen output and keyboard input - DONE!
- A tiny, basic libc which grows to suit our needs - DONE!
- Memory management
- Write a filesystem to store files
- Create a very simple shell
- User mode
- Maybe we will write a simple text editor
- Multiple processes and scheduling
Probably we will go through them in that order, however it's soon to tell.
If we feel brave enough:
- A BASIC interpreter, like in the 70s!
- A GUI
- Networking