Man you should share your story. I got through a few Linux device driver labs but the more I read the less I understand. Even the keyboard driver or the tty driver are thousands of lines long.

I don’t know how people managed to write graphics card drivers back in the day. In the 80d it’s going to be all assembly code too, I think.

They are more black magic than the non-driver kernel components. I can at least understand the concept of kernel components such as VFS/Scheduler and read legacy kernel code without too much trouble, but drivers, even those in Linux 0.12 back in 1991, are crazily hard for me.