The purpose of this project is to write a kernel from scratch (hence the acronym) without any existing software, API or such, using the i386 architecture.
The KFS series is divided into many projects, each one dealing with a specific aspect of kernel programming. All those projects are linked together.
A cross compiler is required to build this project. In the cross-compiler folder we included a few scripts that can be used as a source of inspiration. They are highly architecture-dependent so there is a very low probability that they will ever work as intended on another machine (tbh they barely work on ours).
The kernel is run in QEMU, in an Alpine container. A VNC server is started that can be accessed with the host computer using vncviewer (tigerVNC).
make all will nicely do all the work for us.
The purpose of this project is to have:
- A bootable kernel (via GRUB)
- An ASM bootable base that handles multiboot header
- Basic kernel functions
- A kernel that can print characters on screen
A few bonuses that were added:
- Scroll and cursor support to the I/O interface
- Colors support
- A few helpers like printf and so on
- Handling of key entries (with shift support but backspace is not currently supported)
- Handling of different screens (number of screens can be changed in
vga.h, pressalt + screen numberto switch to a different screen)
The keyboard support is done with polling since we don't have a working IDT and GDT for now. We will switch to interrupts once we have a working IDT and GDT.
The screen support will also probably be modified or removed later on because it's pretty inefficient.