HimayOS - Hobby Operating System

A simple hobby OS for x86 in C with a working shell.

Prerequisites

You'll need:

• i686-elf-gcc cross-compiler
• nasm assembler
• qemu-system-i386 emulator
• grub (for grub-mkrescue)

Windows Setup

Install WSL2 or use a Linux VM, then:

sudo apt-get install nasm qemu-system-x86 grub-pc-bin xorriso

For the cross-compiler, follow the OSDev wiki instructions or use a prebuilt toolchain.

Building

make

Running

make run

This will launch QEMU with your OS.

Features

• VGA text mode output (80x25)
• Keyboard input
• Basic shell with commands
• Interrupt handling (IDT)
• PIC initialization

Shell Commands

• clear - Clear screen
• help - Show available commands
• echo <text> - Print text
• ver - Show version

Project Structure

os-dev/
├── src/
│   ├── boot/          # Boot code (assembly)
│   ├── kernel/        # Kernel C code
│   └── drivers/       # Device drivers
├── include/           # Header files
├── linker.ld          # Linker script
└── Makefile

Resources

• OSDev Wiki
• JamesM's Tutorial