Fusion OS

This is both a documentation and a tutorial for building an operating system, Fusion OS, from scratch in Nim. You can find the source code on GitHub at https://github.com/khaledh/fusion.

Note: The source for this documentation is on GitHub at https://github.com/khaledh/khaledh.github.io. Comments and contributions are welcome through GitHub issues and pull requests.

Screenshots

UEFI Bootloader

GUI (Note: This screenshot is from the graphics branch, which is still a work-in-progress.)

Booting and Running the Kernel

Features

The following features are currently implemented:

• UEFI Bootloader
• Memory Management
  • Single Address Space
  • Physical Memory Manager
  • Virtual Memory Manager
  • Higher Half Kernel
• Task Management
  • Kernel Tasks
  • User Mode Tasks
  • Preemptive Multitasking
  • Priority-based Scheduling
  • ELF Loader
• System Calls
  • System Call Interface
  • SYSCALL/SYSRET
  • User Mode Library
• IPC
  • Synchronization Primitives
  • Channel-based IPC
  • Message Passing
• Hardware
  • Timer Interrupts
  • PCI Device Enumeration
  • Bochs Graphics Adapter Driver

Planned

• Capability-based Security
• Event-based Task State Machines
• Demand Paging
• Disk I/O
• File System
• Keyboard/Mouse Input
• Shell
• GUI
• Networking