OSDev.org

Where can I find a tutorial, in english, on developing my own operating system? (not FAQ.)


If anyone has an answer to my question, please email me promptly.

I'm writing my own as I write my own OS. But, I can't imagine that the documenation will be done soon...

These aren't necessarily tutorials, but they are essential resources.

http://www.nondot.org/sabre/os/articles
http://www.ctyme.com/rbrown.htm
http://nasm.2y.net
http://webster.cs.ucr.edu/
http://www.500mhz.net/ndx.html
http://www.osdev.org/cgi-bin/projects.cgi
http://www.execpc.com/~geezer/os/

Mostly you have to become familiar (i.e. struggle) with specific topics, then go research those in greater depth.

You've missed IMHO the most important pages:

http://osdev.redir.net/
http://osjournal.n3.net/
http://www.themoebius.org.uk/tutes/

OK, but i've seen those resources and i'm still clueless. I need some kind of reading that will walk me through making an OS. (basically a tutorial).

Thanks Anyway,
If you have any other suggestions, reply to this

FROM: Corey Mendell. ???

It isn't Cake... it is an OS... no definite recipe, only foundations. This explaination is about as easy as it gets (assuming you will be using 32-bit protected mode)...
-The protected mode GDT (Global Descriptor Table) dictates access to memory
-The protected mode IDT (Interrupt Descriptor Table) provides the location of "routines" that help maintain the system (external hardware signals, other interrupts, excpetions... etc...)
-Any major fowl-up in protected mode will result in a tripple-fault of the CPU and the computer resets
-I/O (Input/Output) Ports provide access to things like the HD and floppy drive
-The video card can be directly manipulated through memory writes
-Just about the rest depends on your tastes

That just about sums (and I mean sums) up what is needed for a base in a protected mode Kernel/OS. The links that were suggested to you are the easiest reading/understanding combonation available. Considering the time between your 2 posts, I suggest you slow down a bit and read those documents over and over until they "click". People understand things differently, some people can zip through these docs like they are looking at a picture book, others spend months figuring things out... the common bond for anyone to be successful in OS programming (and most everything) is patience.

There are some books you could buy that help you make an OS. I don't know of any that are like tutorials, but a good book to buy is "Operating Systems: Design and Implementation". I'm using this book to make my OS, the book ( in it's 1stEd ) has a complete source code listing of MINUX - a UNIX compatible opeating system.

If you want a tutorial on making a bootable floppy, look at this posting:

http://www.mega-tokyo.com/forum/index.php?board=1;action=display;threadid=38

and click on the attatchment called nasmBoot.txt at the bottom.