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Thank you! This looks like a great resource on the topic.

I wish I still had the source code for the “OS” I made as a teenager. I got as far as writing an MBR boot loader, switching to protected mode, displaying characters on the screen, and keyboard input. I highly recommend it if you’re looking for a fun challenge.

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Writing my own "OS" (read: mostly copying from the OG Bran's Kernel Development Tutorial [1]) was also a formative experience for me as a teenager. Really great way to learn systems programming and what goes on under the hood!

[1] http://www.osdever.net/bkerndev/Docs/gettingstarted.htm

Ha! Same. Lost the code too. It was fun actually booting something into bare metal. This book helped a lot:

https://www.amazon.com/Developing-32-Bit-Operating-System-Cd...

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