OSDev.org

hi all,
   i am new to os development. i have planned to develop a protected mode os. can anyone help me how to start the os?

At http://osdev.neopages.net/ cou can get some very usefull tutorials and
documents.

You should also download this file:
http://my.execpc.com/~geezer/os/pm.zip

It contains 12 pmode tutorials that really helped me to understand the basics
of pmode.

Greetings,
Daniel Raffler