/ZephyrusOS

A x86 Operating system

Primary LanguageC

Zephyrus OS

Zephyrus OS is a hobby x86 operating system kernel I started developing on August 9, 2025.
This project is ongoing.

Current Features

  • Core kernel

    • Text output: print strings, characters, hex values, newline, carriage return, scrolling
    • Global Descriptor Table (GDT) implementation
    • Interrupt Descriptor Table (IDT) with basic exception handling
    • Kernel panic handling (fatal error reporting)
    • Kernel logging system for debugging and runtime information

  • Drivers

    • PIT Timer for system ticks and timekeeping
    • PS/2 Keyboard driver with shift key support and input buffering
    • CMOS Real-Time Clock (RTC) driver
    • PC Speaker driver
    • ATA Driver (Read only)

  • Filesystem

  • Support for the FAT16 filesystem

  • Kernel shell (CLI)

    • Command parsing with argument support
    • Built-in commands (e.g. echo, help, time, etc.)
    • meminfo command (prints available system RAM) NOTE: CURRENTLY DOSENT WORK
    • rd command (prints the contents of a file)
    • Additional internal commands and fallback CLI

  • Bootloader

    • GRUB multiboot2-compliant header in boot.s

  • Graphics

    • Using a Framebuffer (GRUB's gfx payload)

Screenshots

Current progress

Planned Features (TODO)

  • Reading/writing to more then just the root directory
  • Write support
  • Paging
  • Additional device drivers (COM, PS/2 Mouse)
  • Simple line drawing and drawing simple geometric shapes
  • Expand font rendering (Currently limited to only a 8x8 font)

Contributing

This is a personal project, but contributions and suggestions are welcome!

Contact

For questions or feedback, feel free to reach me at: vukmitic81@gmail.com