[!WARNING] Many things might be (are) broken, badly designed, etc. The
  project is a hobbyist operating system, and it comes without any
  warranty whatsoever! See the license for more info. Feedback and
  contributions are highly appreciated.

BlankOS

Rewritten megalithic, ring 0, lower-half, singletasking kernel for the
x86 processor architecture (using 32-bit protected mode), with GRUB 2 as
bootloader. Emulation was tested on QEMU using Arch Linux 6.9.7, and on
real hardware (UEFI and BIOS). The long-term goal of this OS is to be
capable of running user programs and having its own complete kernel C
library so that users can write their own C programs and expand the
system!

Usage

If you’d like to try the OS without compiling, download the latest
BlankOS disk image, and start it using the QEMU emulator:

    qemu-system-i386 blankOS-i386-0.3.55.iso

Building from source

    make toolchain
    make
    make run

The toolchain target will download the appropriate cross-compiling
tools, and the run target will make a disk image for emulation or real
hardware testing. Some operations require root access. Always audit the
code yourself before running anything as root!

Running on real hardware

The OS is now both UEFI and BIOS compatible! Burn your image file onto a
USB stick:

    sudo dd bs=4M if=blankos.iso of=/dev/sdX status=progress oflag=sync

Replace sdX with your USB drive name (you can find it by doing
sudo fdisk -l). Tada! You now have a working BlankOS USB stick. Go ahead
and try it out! (Might not work properly on monitors that aren’t Full
HD)

Documentation

Two other documents are available to help you understand the project
better. One is the User’s Manual, labelled USERS.md, and the other one
is the Developer’s Manual, labelled DEVELOPERS.md. They are full of
useful resources: you’ll learn how to use the system and how to
contribute to it. (The docs might not always be up-to-date)

Resources

-   the OSDev.org wiki and forums
-   the Nanobyte YouTube channel
-   the Daedalus Community YouTube channel
-   a great book named Operating Systems: From 0 to 1, by Tu, Do Hoang
-   the Intel 64 and IA-32 Architectures Software Developer Manuals
-   Bran’s Kernel Development Tutorial
-   Ralf Brown’s Interrupt List
-   the little book about OS development by Erik Helin and Adam Renberg

Features

-   Booting with GRUB
-   Common basic structures (IDT, GDT, ISRs, IRQs)
-   Common drivers (framebuffer, keyboard, serial, timer, RTC, ATA PIO)
-   Kernel-space utilities (shell, simple programs)
-   Filesystem (VFS ramdisk)
-   Custom VGA font
-   Dynamic memory allocator
-   UEFI support
-   Miscellaneous (snake, …)