⚡ AetherOS – Live Real-Time Web Operating System & Kernel Simulator

AetherOS is a full-featured, interactive Live Web Operating System and Real-Time Kernel Simulator built to demonstrate core operating system concepts — process scheduling, virtual memory paging, POSIX virtual file systems, system calls, and desktop window management — directly in a modern web environment.

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🌟 Key Features & OS Subsystems

1. 🧠 Micro-Kernel Central Engine (core/kernel.js)

• Integrated System Call Vector Table (sys_read, sys_write, sys_spawn, sys_kill, sys_ps, sys_info, sys_mkdir, sys_readdir, sys_chdir).
• Real-time uptime monitoring, OS build tracking, and process execution lifecycle management.

2. ⚡ CPU Process Scheduler & Gantt Simulator (core/scheduler.js)

• Full Process Control Block (PCB) simulation tracking PID, state (READY, RUNNING, WAITING, TERMINATED), burst time, remaining time, priority, and memory footprints.
• Supported CPU Scheduling Algorithms:
  • 🔄 Round-Robin (RR) (Configurable Time Quantum)
  • ⚡ Shortest Job First (SJF)
  • 🥇 Priority-Based Scheduling
  • ⏱️ First-Come First-Served (FCFS)
• Calculates Average Waiting Time, Turnaround Time, and renders an interactive Gantt Chart Timeline.

3. 💾 Virtual Paging Memory Allocator (core/memory.js)

• Simulates 64MB Virtual RAM divided into 4KB Page Frames (16,384 physical frames).
• Real-time memory allocation, page table mapping, page fault simulation, and dynamic process memory de-allocation.

4. 📂 POSIX Virtual File System (VFS) (core/vfs.js)

• In-memory hierarchical filesystem (/bin, /etc, /home/user, /sys, /var/log).
• POSIX-compliant system calls supporting directory creation, file reading/writing, path resolution, and absolute working directory tracking.

5. 💻 AetherShell Command Line Interpreter (core/shell.js)

• Interactive terminal CLI with built-in commands:
  • sysinfo, ps, spawn, kill, mem, bench, ls, cd, cat, write, mkdir, rm, pwd, clear, date, version.

6. 🪟 Cyberpunk Glassmorphism Window Manager & GUI (gui/window_manager.js)

• Multi-window Desktop Environment with draggable header bars, resizable containers, z-index focus layering, minimizing, maximizing, Taskbar integration, and Start Menu.
• Built-in Desktop Apps:
  • 💻 Terminal Shell App
  • 📂 File Explorer App
  • 📊 Resource & Process Monitor App
  • ⚡ CPU Scheduling Benchmark Simulator
  • 📝 Text Editor / Notepad App
  • ⚙️ System Settings App

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🏗️ System Architecture

graph TD
    User["👤 User / Desktop Window Manager"] -->|Shell Input / App UI| Shell["💻 AetherShell CLI"]
    Shell -->|System Call Vector| Kernel["🧠 AetherOS Micro-Kernel"]
    Kernel -->|PCB Queue & Gantt| Scheduler["⚡ CPU Scheduler (RR / SJF / Priority)"]
    Kernel -->|Page Frame Allocation| VMM["💾 Virtual Memory Allocator (4KB Pages)"]
    Kernel -->|POSIX File I/O| VFS["📂 POSIX Virtual File System"]
    VMM --> RAM["📼 64MB Virtual RAM Frames"]
    VFS --> Disk["💾 In-Memory Node Tree"]

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🧪 Automated Kernel Test Results

Run tests via Node.js:

node tests/test_kernel.js

Test Results Output:

==========================================
🧪 Running AetherOS Kernel Verification Suite
==========================================

✅ PASS: VFS Root Initialization
✅ PASS: VFS Directory Creation (/home/user/Projects)
✅ PASS: VFS File Writing
✅ PASS: VFS File Reading Content Verification
✅ PASS: Memory Manager Kernel Initial Reservation
✅ PASS: VMM Allocation (8MB Paged)
✅ PASS: VMM De-allocation & Frame Recycling
✅ PASS: CPU Scheduler PCB Creation
✅ PASS: Round-Robin CPU Scheduler Simulation
✅ PASS: SJF Optimization Efficiency Verification
✅ PASS: Shell command 'sysinfo'
✅ PASS: Shell command 'ps'
✅ PASS: Shell command 'spawn Calculator'
✅ PASS: Shell command 'bench'

==========================================
Test Execution Summary: 14 Passed, 0 Failed
==========================================

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🚀 Running the Live Operating System

1. Open index.html in any modern web browser (Chrome, Firefox, Edge, Safari).
2. Enjoy the live desktop environment!
   • Launch apps from the Desktop icons or Start Menu.
   • Run CPU Scheduling simulations in the CPU Scheduler app.
   • Execute terminal commands like sysinfo, bench, ps, ls, and mem inside AetherShell.
   • Create and edit files in File Explorer and Text Editor.

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📄 License

This project is licensed under the MIT License.