HorizonOS v5

A 32-bit monolithic kernel for the x86 architecture

Overview 🌟

HorizonOS is a hobby kernel targeting x86 systems, designed as a learning platform for low-level systems programming. Built from scratch and using the GRUB bootloader, it demonstrates core operating system concepts while maintaining simplicity and readability.

Features 🛠️

Implemented ✅

• Monolithic kernel design for single-processor systems
• Basic memory management (paging, frame allocation) supporting up to 4GB RAM
• Preemptive multitasking implementation
• Minimal ACPI parsing capabilities
• PS/2 keyboard driver
• Custom C library (libc) in development
• Basic math library (libm)

Planned 📅

• Multi-core support
• PCI device enumeration
• USB drivers and mouse support
• Network stack support and ethernet drivers
• Graphical display support
• Improved filesystem support

Building HorizonOS 🛠️

Prerequisites 📦

• i386-elf cross-compiler
• NASM assembler
• GRUB 2.0+
• QEMU (for emulation)

Install build dependencies (Debian/Ubuntu) 🐧

sudo apt install nasm grub-pc-bin qemu-system-i386

Set up cross-compiler (using included script) ⚙️

sudo sh install-cross-compiler.sh

Compilation 🔨

make all

Running in QEMU 🚀

make run

The horizonos.iso file will be generated in the repository's root.

This will:

1. Build the kernel ISO
2. Launch QEMU with:
   • 256MB RAM
   • CD-ROM boot
   • Serial output
   • VGA display
   • Logging to debug/ directory

Contributing 🧑‍💻

Contributions are welcome ! Feel free to open issues and send pull requests.

License 📜

Distributed under the MIT License. See LICENSE for more information.

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Note: This is experimental software - use at your own risk. Not recommended for production environments or critical systems.