Just another toy operating system

• Introduction
  • Background Story
• Project
  • Structure
• License
  • Forbidden

Welcome, this is the repository of the JatOS (Just Another Toy Operation System) learning project. The project is in active development and is updated from time to time. The project, which was mainly implemented in C and Assembler, originally aimed at gaining a deeper understanding of the internal processes of an operating system as well as the functionality of the hardware. In the course of time, however, the project increasingly developed into a personal undertaking with the ambition of creating a lightweight "toy" operating system. So feel free to contribute or writing extensions in any kind.

What is it, what isn't? A good question especially on such a complex topic. What drives me? Hmm, the interest in hardware near development, a hint of naivety?! Everyone agrees on one thing: A mammoth project for a student of Applied Computer Science in the third semester. Now I see this project less as a project with a fixed goal and more as a way towards a deeper understanding of kernel, bootloader and co.

Personally, I am someone who prefers to try it out for himself and apply the theory he has learned. Well, admittedly not quite as easy for such a complex topic as computer engineering. However I developed promptly, admittedly not exactly according to textbook, but for me in every perspective very rich in experience.

So this project should be seen as what it actually is: The diary of a student on his way to a better understanding of the world of operating systems.

Even if only the x86 (i386) architecture is supported so far and this will not change in the foreseeable future, the project is basically structured in such a way that several architectures can be supported and developed in a uniform repository.

/jatos
├── arch                    # Architecture dependant code
│   └── ${ARCH}
│       └── src
│           ├── boot        # Multiboot header + Kernel entry
│           └── cpu         # ${ARCH} dependant CPU interface
├── boot                    # Bootloader/Multiboot configuration
├── include                 # Header files (*.h) for all sources
├── libc                    # C library used by JatOS kernel
└── platform                # Platform dependant code
    └── ${PLATFORM}
        └── src
            ├── cpu         # Platform related CPU utilities
            ├── driver      # Device Drivers for ${PLATFORM}
            └── io          # Hardware I/O access

Copyright (c) 2019 0x1C1B

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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MIT License or LICENSE for more details.

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