KernOS
By
@PahalDesai
- 4 Devlogs
- 6 Total hours
An x86 operating system written in C and Assembly.
Ship #1
Pending review
KernOS
KernOS is an x86 hobby operating system written in C and Assembly. It features a custom shell with commands like help, ver, clear, and neofetch, keyboard input, hardware information detection, a Hangman game, and a custom hand-made boot screen.
What was challenging
The assembly part was very painful. Assembly itself is difficult to understand. after spending a lot of time in assembly and figuring out nothing, I decided to make the kernel in C. It made it much easier. But C was still challenging as it lacked libc. So, the basic functions like printf(), comparison of 2 strings in the if statement, scanf() and all were not available. I had to manually define all of them before using them.
I am proud of
I made the very first version of a custom operating system with minimal use of ai!
what comes in the next ship
In the next ship of this project, I will add features to create/edit/delete files and a custom text editor.
for people testing the project
- Download the iso file from the GitHub releases page.
- use qemu with the following command -
qemu-system-i386 -cdrom KernOS.iso -device isa-debug-exit,iobase=0xf4,iosize=0x04
1h 5m 18s logged
2h 14m 34s logged
DEVLOG 3
I finally learnt the proper way to write devlogs :D
i added a lot of things:-
- The logic of commands and outputs
- Some basic commands like clear, help, ver
- Neofetch command!! (the beggest one)
- And an easter egg command
I have had a really terrible experience here as i had to define every single thing. It doesn’t have libc. i had to define basic functions like printf() and it coudn’t even compare 2 strings in the if statement. i had to define the compare 2 strings function T_T.
but now it’s a nice and good looking CLI os kinda thing ig.
1h 28m logged
I tried moving to the kernel section. I spent some time programming the kernel in assembly. it was really painful… really…. really…. really…. painful 💔. So i shifted to a kernel written in C. It really made the task much easier than to code in assembly (precisely x86 32 bit protected mode NASM assembly 🥴).
I wrote the kernel hello world kinda test program in C (the one used in kernel, da real c is way easier).
Also, i used GRUB as the bootloader!
47m 57s logged
today i learnt some very basic assembly and wrote my first hello world os!
