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Free small OS code?

  1. Sep 9, 2006 #1
    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/
  2. jcsd
  3. Sep 9, 2006 #2


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    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:

    The Kernel is here:
    http://www.engr.uconn.edu/~kishori/Project/ucosStudents.tgz [Broken]
    Though if i remeber it is password protected, and it since it has missing portions it wouldn't really function very well.
    Last edited by a moderator: May 2, 2017
  4. Sep 9, 2006 #3


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    I've only heard about it; I haven't tried to use it. But this might be what you're looking for.
    Last edited by a moderator: Apr 22, 2017
  5. Sep 9, 2006 #4
    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/ [Broken]

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


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

    I've also heard of Xinu:

    Last edited by a moderator: May 2, 2017
  6. Sep 11, 2006 #5
  7. Sep 11, 2006 #6
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