Programming

sorry guys, this is a project for school. I wish I could give you my plans. I hope after I turned this project in and maybe release as a open source for other people to make better.


Anyone know exactly where I should start? Like what is the next thing after the design that I should do.

How "serious" an OS is this? Is it a theoretical construct, or does it need to fully utilize a modern system?

If you could get away with writing in 16-bit real mode, your work would be miles easier -- you could write a "hello world" without having to worry about disk drivers, keyboard interrupts, timing controllers, or any protected-mode histrionics by relying on BIOS I/O calls. Once you've got your "hello world" working, you can start building the structure from there. I'd almost say you have to start this way, getting a tinkertoy version of your OS running in 640K might happen before you manage to properly switch into real mode. If people really like it, they could reinvent it in protected mode themselves, like how Minux inspired Linux.

Either way though, getting a bootloader to load a kernel is way different than getting an OS to load a program. Some "magic" code is needed, and you need to put the right things in the right places. Play around with the GRUB bootloader, and have a look at the source code for memtest86 -- it's a small program that loads and runs raw from the bootloader too.

This may be little late but i found something that i think should be your initial step towards building your OS.
Just try to read about LFS(i.e Linux from scratch). This topic covers everything about How linux can be build according to your convenience .If you find this to be in your grasp then building an operating system should not be a big deal for you.

There is an enormous difference between building linux from scratch and writing linux from scratch. Building it, i.e. compiling it, might take a couple days. The other is an ongoing effort, 18 years and counting.