writing my own OS.....where to start from??

Originally Posted by N0P

Try reading source code of other O.S. such as LinuX,HURD,BSD
P.s.> reading iz a source of knowledge ! Soorrry for my bad english ;o))

You would go crazy if you try to read the source of Linux, or BSD. It will take you couple months just to understand the low level code. Why not try to start with this books "linux kernel internal", then move up from there. I also have a book "Writing 32-bit OS" from Sams which have all the source in there too. PM me if you want the source.