A simple operating system project for learning and experimentation purposes.

Currently Implemented:

• GRUB bootloader integration
• GDT/IDT setup and interrupt handling
• PS/2 keyboard driver with full scancode support
• Timer driver and PIC management
• Basic shell with input buffering and file system commands
• Memory management and VGA text mode
• ATA/IDE hard disk driver
• FAT32 file system support
• File operations: ls, cat, fsinfo commands

Planned:

• File creation and writing support
• Process management and virtual memory
• System calls and user mode

Linux system required (native, WSL2, or VM)

# Ubuntu/Debian
sudo apt install build-essential nasm qemu-system-x86 grub-pc-bin xorriso dosfstools

# Arch Linux  
sudo pacman -S base-devel nasm qemu grub xorriso dosfstools

# Fedora
sudo dnf install gcc nasm qemu grub2-tools xorriso dosfstools

Note: dosfstools is required for creating FAT32 disk images.

git clone https://github.com/Flapjacck/skos.git
cd skos
make          # Build kernel, create ISO, and disk image automatically
make run      # Launch in QEMU with attached disk

The build system automatically creates and manages a disk image:

• Automatic Creation: Running make creates a 64MB FAT32 disk image if it doesn't exist
• Test Files: The disk comes pre-populated with test files (README.TXT, TEST.TXT, HELLO.TXT)
• QEMU Integration: The disk is automatically attached when running make run

# Create a new disk image manually
dd if=/dev/zero of=disk.img bs=1M count=64
mkfs.fat -F 32 disk.img

# Mount the disk to add files
mkdir -p mnt
sudo mount -o loop disk.img mnt
echo "Your content here" | sudo tee mnt/YOURFILE.TXT
sudo umount mnt

# Run with custom disk
make run  # Uses disk.img automatically

• OSDev Wiki - OS development guide
• Intel Manuals - x86 architecture reference