from Hacker News

It doesn’t use any libraries, not even the C standard lib! It just uses the Linux system call interface.

Drawing to the screen is done by writing directly to /dev/fb0.

I created this just to learn assembly - something of a lost art these days. I’m mainly a C++ developer. This has been a lot of fun and very enlightening.

Here is a video: https://youtu.be/IoJQ80pWyGI