Small *nix-like kernel, written in C and a grain of x86 Assembly. It served me in the journey of understanding low level concepts about how computers work under the hood. Credits to Osdev Wiki for the best resources out there.

• Tried to join The Edyptula Challenge and failed
• Could not understand what CPUs actually do, so I've decided to get closer with them 😉
• C pointers were intimidating monsters to me... Until PhotonOS was born
• To roll your own Linux Distro was too mainstream 😎

• Text-mode video driver
• Keyboard, PIC drivers
• Memory management using paging
• User space support and a small version of LIBC
• System calls
• Multitasking (kind of supported, but it is not used anywhere other than tests)
• Virtual file system and initial RAM disk
• Some self testing procedures

You can find some older releases alredy built, but if you want to play with the last version you need to:

1. Download the cross compiler from https://drive.google.com/file/d/0Bw6lG3Ej2746STJaM2dNbC05elE/view?usp=sharing
2. Copy the cross compiler to ~/opt (it already has the desired directory structure)
3. Install GRUB 2 (for grub2-mkrescue command), xorriso and NASM
4. If you want to run it too, you will need qemu-system-i386
5. make && make install should create the photonos.iso file
6. make run will start qemu with the PhotonOS image

Don't try to run it directly with the kernel image (photonos.elf) as it is dependent on GRUB.

It has been a dead project for the past years, but if you have any feedback or if you are interested about learning OS development, don't hesitate to drop me an email at mihailferaru2000@gmail.com or contact me on Linkedin