kfs

kfs-1 implements the early foundations of a kernel, including a working interrupt system, hardware input handling, and VGA-based rendering. The codebase is structured using namespaces and structured types to maintain clarity and modularity.

Features

Kernel Panic

• kernel_panic() displays a full-screen red VGA error screen
• Shows a custom error message
• Triggered by critical exceptions such as divide-by-zero

Interrupt Descriptor Table (IDT)

• Fully implemented IDT
• Divide-by-zero handler triggers a kernel panic

Hardware Interrupts (IRQ)

• Timer (IRQ0)

  • System tick counter
  • Time tracking in milliseconds and seconds since boot

• Keyboard (IRQ1)

  • Handles key input
  • Allows basic text input on screen

• Mouse (IRQ12)

  • PS/2 mouse support
  • Packet parsing
  • Cursor movement and basic drawing support

Multi-Screen Management

• Support for multiple virtual screens (F1–F4)

• Each screen stores:

  • VGA buffer state
  • Cursor position

• Allows switching between independent screen contexts

VGA Screen System

• Direct manipulation of VGA text buffer
• Support for writing and drawing operations

System Architecture

• Clean modular design using namespaces and structured types
• Separation of concerns across hardware, interrupts, and UI layers

Debug & Utilities

• Serial output for debugging (serial_print)
• Formatted printing (sprintf, vsprintf)