OctOs

An OS created in October. This OS is 32 bits, provides a heap and a command line interface.

Features

• Pure bootloader (no GRUB).
• 32 bits, protected mode.
• Custom standard library.
• Command line interface.
• Heap.
• (WIP) Error handling.
• (WIP) Commands.

Standard Library

This os provides a custom standard library located in src/kernel/std, here is files :

• types : System types
• io : Input / Output
• mem : Memory handling
• err : Error handling

Architecture

• utils : Some scripts.
• src : Source files.
• src/boot : Boot source files (Assembly).
• src/kernel : Kernel source files (C).
• src/kernel/std : Standard library.
• src/kernel/cmd : All command programs.

Build

Here is makefile commands. To build :

$ make

To build and run :

$ make run

To remove temporary files :

$ make flush

To clean everything (removes all build files) :

$ make clean

Depedencies

To build the OS you must have :

• nasm : Assembly sources.
• python3 : Scripts in the utils folder.
• cc (for i386, provided with GCC) : For C sources.
• ld (for i386, provided with GCC) : To link object files.

If the compilation fails, please make sure that you have a cross compiler (for i386). Here is some documentation about how to build a cross compiler.

Links

Here are some useful links :

• VGA reference
• Keycodes reference
• Linux Kernel
• OsDev
• Developpez (French)