Same material in video format if you prefer: https://youtu.be/D7CBcFlR3Ms?list=PLEMXAbCVnmY7Zja8lG2TLXvO3...

Also, interesting tidbit: this is from the person behind the Handmade Hero project, which has been discussed here before and is a lot of fun if you're into low level / 90s style video game programming (https://www.youtube.com/channel/UCaTznQhurW5AaiYPbhEA-KA)