PeachOS64 — Build a Modern 64-Bit Operating System From Scratch

This repository is the companion source code for Part 2 of the PeachOS series.
In Part 1, we built PeachOS, a fully functioning 32-bit multitasking operating system.

In Part 2, we take the project to the next level:
🚀 Building a 64-bit multi-threaded kernel that runs in long mode with a graphical user interface (GUI) capable of rendering interactive, clickable, draggable windows.

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What You’ll Learn in This Course

This isn’t just theory—you’ll build a complete, modern OS step by step, starting from the bootloader all the way to a graphical desktop environment.

🔹 Module 1 Overview

• Graphics & Display

  • Capture and control the UEFI framebuffer (draw pixels directly to screen).
  • Load images & fonts.
  • Build a terminal that renders text using pixel-based fonts.
  • Create the graphical subsystem beneath the terminal:
    • Relative drawing anywhere on screen.
    • Hierarchical graphics (parent/child offsets).
    • Composable UI elements.

• Memory Management

  • Rebuild the heap allocator using the UEFI/BIOS E820 memory map.
  • Multi-heap system with intelligent allocation.
  • Paging-based memory defragmenter to solve fragmentation.

• Disk & Partitions

  • Extend FAT16 filesystem to support multiple GPT partitions.
  • Mount each partition as a virtual drive.
  • Abstract the disk system for modern SSD/PCIe storage support.

✅ By the end of Module 1, you’ll have:

• A 64-bit kernel bootable on modern UEFI hardware.
• A pixel-based terminal with a full graphical foundation.
• Advanced heap allocator + defragmentation support.
• A multi-partition disk subsystem ready for GPT/SSD storage.

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🔮 Coming in Module 2 (ETA: Dec 2025)

• Standard C library in userspace (fopen, fread, etc.) via isr80h.
• Full windowing system with interactive GUI elements.
• NVMe SSD driver (high-speed storage).
• PCI/PCIe enumeration & bridge support.
• Run real user programs on your OS — contribute to the shared GitHub repo of student applications!

By the end of Part 2, you’ll have built a multi-threaded, 64-bit, GUI operating system from scratch—bootable on real hardware and extensible enough to run user applications.

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📚 Take the Course

This repo contains the source code, but the course walks you through every line of it step by step.
👉 Enroll Here and start building your own OS today.

🎉 Special Discount

If you purchase Module 1 before Module 2 is released, you’ll get Module 2 for just €34.99 (or equivalent in your currency).
Simply email [email protected] with proof of purchase. Module 2 is estimated to be released in December 2025

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License

This code is provided for educational purposes as part of the PeachOS course under GPL license See the license file.