BasicOS - A Minimal Operating System

Overview

This is a basic, educational operating system designed to demonstrate fundamental OS development concepts.

Prerequisites

• i686-elf cross-compiler
• NASM assembler
• GRUB2
• QEMU (for testing)

Environment

• Ubuntu 24.04

• qemu

• nasm

• gcc

• make

• sudo apt-get update

• sudo apt-get install nasm qemu gcc gcc-multilib

debug tools

• sudo apt-get install xxd gdb

Building the OS

# Compile the OS
make

# Create bootable ISO
make iso

# Run in QEMU
qemu-system-i386 -cdrom basicos.iso

Components

• boot.asm: Multiboot-compliant bootloader
• kernel.c: Minimal kernel with basic screen output
• linker.ld: Linker script to organize kernel memory layout

Learning Objectives

• Understand x86 boot process
• Learn low-level system programming
• Explore kernel development basics

Limitations

This is a minimal, non-functional OS meant for educational purposes.