/bemxos

An operating system, made for learning stuff about OS dev and just for fun!

Primary LanguageCMIT LicenseMIT

bemxOS

bemxOS (pronounced "bemsh-OS" but people pronounce it wrongly as "bem-x-OS" and other people get to be pedantic and correct those people) is a little operating system created by me (bemxio!), just for learning OS development.

Based on this cool tutorial. If you want to make your own OS, you should follow that tutorial too!

I plan to add network support and all of the other cool stuff later on, don't expect it soon though. For now, it will probably just have a few basic commands with a basic filesystem as well.

Running

As it seems, the system only works on QEMU, however I plan to look at the issues with VirtualBox and VMware.

Just simply run the bemxOS.bin file within the command line with the following command:

qemu-system-i386 -fda bemxOS.bin

Building

You will need some prerequisites before you start compiling the system:

  • a Linux host system (if you are on Windows, WSL will do the job)
  • a GCC cross-compiler (feel free to follow this tutorial for steps on how to compile one yourself)
  • (optionally) GCC, for debugging
  • (optionally) QEMU, for testing & debugging the system

  1. Export some global environment variables:

    • CC_PATH, that points to the directory path of your cross-compiler.
    • (optionally) QEMU_PATH, that points to the QEMU directory. (for Windows peeps, install QEMU on Windows and point to it in WSL, where /mnt/c/ is C:\)
    • (optionally) GDB_PATH, that points to the GDB executable. (for Windows peeps, it's the same as with QEMU)

  2. Clone the repository using git, and use cd to change the current directory.

  3. Just run the make command, and it should work!

It should produce a bemxOS.bin file at the end, that you can launch with QEMU.

If you want to clean all of the mess the compilers made, you can run make clean to quickly get rid of all of the files.

Debugging

If you set up the QEMU_PATH and GDB_PATH environment variables, you can use make debug to compile the code and run it inside of a debugging session in GDB.

You can also do make run, if you just want to run it, although you still need QEMU_PATH to be set up.

Contributions

Feel free to point out any mistakes or issues you've found while using this little thing!

Anything from a simple question to a pull request is really appreciated!