Coding an Assembly PRINTF for 16 bit real-mode

This is perfect for debugging when you write an OS because you will be working in 16 bit and this even works in 16 bit protected mode.

So today we'll write our own Printf-style function in Assembly.

This is a stand-alone episode but we'll use my OS project as a base. You find the code in the repo below (same folder as my OS kernel).

Enjoy!
JB

#OSdev

References

1. Become a channel member and get several benefits, check out:
https://www.youtube.com/channel/UC6Q8NDGqQ2eJ7QXX693ikdw/join

2. Coding your own OS kernel in C and Assembly
https://youtu.be/IJ0YTdOgBhQ

3. Check out my premium courses
https://courses.doctorbirch.com

4. Felix' Asm instructions: Enter
https://www.felixcloutier.com/x86/enter

5. Repo with my OS kernel & this Printf function
https://repo.doctorbirch.com/oskernel

00:00:00 Introduction
00:02:23 Printing via BIOS
00:10:37 Printing to Qemu debug console
00:18:23 Hex number to string
00:50:41 Trying it out

Видео Coding an Assembly PRINTF for 16 bit real-mode канала dr Jonas Birch