OS Development on Windows – Part 1: Building a UEFI Application in NASM

This is a series of articles on developing your own operating system. We will be focusing on modern techniques, like UEFI booting and 64-bit assembly, and everything will be created from scratch. I will be going step-by-step, explaining every tool we use and every line of code, so that you have a thorough understanding of the process. You should be able to copy-paste these steps and get the same results I am describing. In addition, we will be doing this on Windows and using the tools available on this platform only. OS development is almost exclusively done on UNIX-like systems because the tools are more readily available and documented. I hope to show you how easy this is to do on Windows too.[…]

https://github.com/BrianOtto/nasm-uefi

https://hackerpulp.com/os/os-development-windows-1-building-uefi-applications-nasm/