This is the reason I learned Assembly in high school. I wanted to write my own OS and well it seemed at the time (around 2000) that I would need to know ASM to a bunch of the low level stuff. I didn't really have anyone to tell me I could write a whole OS in C or C++.

I got a floppy to boot into my os and print hello world and I learned a ton about how to program a processor. It was fun. Oh the crazy things you do as a teenager...