Zephyrus OS

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

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Current Features

• Core kernel

  • VGA 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)
  • rd command (prints the contents of a file)
  • Additional internal commands and fallback CLI

• Bootloader

  • GRUB multiboot-compliant header in boot.s

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Screenshots

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Planned Features (TODO)

• Reading/writing to more then just the root directory
• Write support
• Paging
• Additional device drivers (COM, PS/2 Mouse)

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Contributing

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

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Contact

For questions or feedback, feel free to reach me at: [email protected]