Free Small OS Code: Learn Operating System Fundamentals

[jainabhs]

I am presently learning operating system fundamentals.

Can anyone tell me m from where I can get free very small operating system code, in order to understand how it basically works?

It will be big help...(Please exclude Linux

Thanks in anticipation/

 

[-Job-]

I am presently learning operating system fundamentals.

Can anyone tell me m from where I can get free very small operating system code, in order to understand how it basically works?

It will be big help...(Please exclude Linux

Thanks in anticipation/

I remember in my OS course we used a simulator from Brown University i think which allowed you to load an OS's kernel on top. For that class we were using a kernel written by a professor at my university. The assignments involved coding portions of the kernel that were intentionally left out.

The Brown Simulator:
http://www.cs.brown.edu/software/brownsim/

The Kernel is here:
http://www.engr.uconn.edu/~kishori/Project/ucosStudents.tgz
Though if i remeber it is password protected, and it since it has missing portions it wouldn't really function very well.

 

[Hurkyl]

http://www.tinyos.net/

I've only heard about it; I haven't tried to use it. But this might be what you're looking for.

 

[Your.Master]

OS/161 is designed to teach undergraduate students about operating systems over four months. That's what they used to teach me in third-year. I honestly don't know if it's still good to learn from without a lecturer.

http://www.eecs.harvard.edu/syrah/os161/

It's inspired by, but not based off of, NachOS, which is also meant to be instructional.

http://www.cs.washington.edu/homes/tom/nachos/

They are sort of hard to set up in the first place (or were when I used them).

I've also heard of Xinu:

http://www.cs.purdue.edu/homes/dec/xsoft.html

 

[arevolutionist]

Minix is a educational OS. Andrew recently released version 3.
http://minix3.org

This site has documentation on OS development.
http://osdever.net

This is a research OS, not truly a educational OS.
http://plan9.bell-labs.com/plan9/

 

[sleepsleep]

try dex minidos (with source in assembly language ~ fasm)
http://board.flatassembler.net/topic.php?t=5275

and fasm ~ OS construction section
http://board.flatassembler.net/forum.php?f=11

512 bytes OS competition (all with source code)
http://board.flatassembler.net/topic.php?t=2164

os dev forum
http://www.osdev.org/phpBB2/

have fun and happy coding.