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  • Code Exchange
  • assembly
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OS Development

nick123
nick123 over 10 years ago

     I've been studying assembly language for a long long long time, and I want to try OS Development. I've heard of MikeOS it was entirely written in real mode assembly. I looked over the code of MikeOS and now I feel very discouraged. It is a lot of complicated code just for a simple os.

 

MikeOS - simple x86 assembly language operating system

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  • michaelkellett
    michaelkellett over 10 years ago +1
    Most OS are not written in assembler but in C or other high level language. To write even a small scheduler type OS in assembler is an odd thing to do since it will make it take longer and it won't be…
  • johnbeetem
    johnbeetem over 10 years ago in reply to nick123 +1
    Nick Gallagher wrote: Why is C portable and not assembly? An assembly language program only runs on one computer architecture, i.e., one instruction set. You can't run ARM assembly language on x86…
  • clem57
    clem57 over 10 years ago in reply to nick123 +1
    Yes if they produce a .COM module and assembly inline OK if you are careful.
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  • shabaz
    0 shabaz over 10 years ago

    Read Labrosse' book about uC/OS-II. That is about the easiest book (practical oriented) on operating systems for microcontrollers.

    There is a good book by Tannenbaum but it would be a bit scary for a beginner.

    There are also books on OS theory - depends on how deep you want to go - from your comments it sounds like you want to examine real implementations though.

     

    There really is no need to study assembler for a long time, because only the bare minimum needs to be written in assembler for an OS.

    (The rest is all about optimisation, and often a C compiler is very good).

    Writing more than the minimum could mean that your OS is harder to port to different processor architectures.

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  • shabaz
    0 shabaz over 10 years ago

    Read Labrosse' book about uC/OS-II. That is about the easiest book (practical oriented) on operating systems for microcontrollers.

    There is a good book by Tannenbaum but it would be a bit scary for a beginner.

    There are also books on OS theory - depends on how deep you want to go - from your comments it sounds like you want to examine real implementations though.

     

    There really is no need to study assembler for a long time, because only the bare minimum needs to be written in assembler for an OS.

    (The rest is all about optimisation, and often a C compiler is very good).

    Writing more than the minimum could mean that your OS is harder to port to different processor architectures.

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