CoreOS

CoreOS is a lightweight, 32-bit, ring-0 operating system written from scratch with a focus on education, experimentation, and fun. It features a custom shell, dynamic memory management, cryptography utilities, mathematical functions, and interactive commands, providing a foundation for building OS-level experiments and simulators.

---

Table of Contents

• Features
• Installation
• Usage
• Commands
• Contributors
• License
• Future Plans

---

Features

• Custom Shell: A fully interactive kernel shell with support for command history, colored output, and dynamic input handling.
• Dynamic Memory Management: kmalloc and kfree for heap allocation inside the kernel.
• Math Utilities: Support for common mathematical functions (sqrt, pow, sin, cos, log, etc.) and arithmetic computations.
• Cryptography Utilities: SHA-224 and SHA-256 hashing directly in the kernel.
• Interactive Fun Commands: Easter eggs, jokes, ASCII animations, and interactive chatbot-like responses.
• Version Management: Automatic patch version incrementation and version.h generation.
• Terminal Features: Customizable colors, prompt, and text output using printk.
• Keyboard Handling: Supports shift, capslock, and special keys with real-time feedback.

---

Installation

Prerequisites

• gcc, nasm, as, ld
• grub-mkrescue for ISO creation
• Linux or WSL environment recommended

Build Instructions

1. Clone the repository:

git clone https://github.com/Teams-Workspace/PrismaOS.git
cd CoreOS

Contributors

• Saad Ali – Ghazanfar Pasha - Muhammad Roshaan Idrees

GitHub Profiles:

0X1Saad, itsmesaadali, Ghazanfar Pasha, Muhammad-Roshaan-Idrees

Running in QEMU (scaled text mode)

To run the built ISO in a window that scales the VGA text display (keeps text crisp and left-aligned), use the bundled script:

./run_qemu.sh

Notes:

• The script uses SDL display with window controls (minimize, maximize, close buttons).
• Sets SDL_RENDER_SCALE_QUALITY=nearest so when you resize the window, VGA text scales with nearest-neighbor (no blur).
• You can toggle fullscreen in QEMU (SDL) with Ctrl+Alt+F (host/window-manager dependent).
• The UI includes color-coded text: cyan logo, grey info, yellow hints, green prompt.
• If you prefer true fullscreen at start, run qemu-system-x86_64 ... -display sdl -full-screen (some environments require X11/SDL support)..