A tiny 32 bit kernel written in C with a simple driver to use VGA text mode buffer as output device
Right now, all it does is paint the screen blue and displays some text
You need to set up binutils and a gcc cross compiler. Instructions here
You're also going to need qemu to run the kernel
Once that's done, to simply run
$ ./build.sh
$ qemu-system-i386 -kernel myos.bin