What was your first tutorial?

[Muazzam]

What was your first (practical) OS development tutorial (or Book) and when?
My first tutorial was:
http://www.youtube.com/watch?v=Lgd5aV2LKrk -By Yael Donkers (about 8-9 mounts ago).
A very good tutorial for absolute beginners.

[Combuster]

I recall the protected mode tutorials as once being my starting point. It would now qualify as ancient and it's certainly not perfect - it even teaches some scary things, but it was certainly useful and did a good job at describing how things worked.

[JackScott]

Tim Robinson's Writing a Kernel in C tutorial was the first that I can remember reading, but there were probably many more before that. This was probably around 2003 or so, quite a long time in Internet-years.

Despite being very aged now, the writing of Tim Robinson really inspired me to do something different and not just a UNIX clone. I pored through the code for Möbius, trying desperately to understand it (my grasp of C and assembly at that stage were not good).

[alexfru]

I first read this Russian book on protected mode and tried a number of things from it: Защищенный режим процессоров Intel 80286/80386/80486.

Then I read the MINIX book (1st edition, actually) and got some ideas from it: Operating Systems: Design and Implementation.

[iansjack]

Andrew Tanenbaum's Operating Systems: Design and Implementation (1st Edition). A brilliant book. Typed the whole thing in by hand and finally got it working on an original IBM sewing-machine "portable".