🏓 Ping Pong Game in x86 Assembly

A classic Ping Pong (Pong) game implemented in x86 Assembly Language for DOS environments. The game demonstrates low-level programming concepts including interrupt handling, direct video memory access, keyboard input processing, and real-time game mechanics.

Features

• 🎮 Real-time Ping Pong gameplay
• ⌨️ Keyboard-controlled paddles
• ⚡ Timer interrupt-based ball movement
• 🖥️ Direct video memory manipulation (0xB800)
• 📊 Score tracking system
• 🔄 Ball collision and bouncing mechanics
• 🛠 Custom keyboard and timer ISR implementation
• 🎯 Winning condition when a player reaches 5 points

Controls

Key	Action
←	Move active paddle left
→	Move active paddle right

Technical Concepts Used

• x86 Assembly Programming
• DOS COM Executable Format
• Interrupt Service Routines (ISR)
• Keyboard Interrupt (INT 09h)
• Timer Interrupt (INT 08h)
• Direct Screen Buffer Access
• Real-Time Game Loop
• Memory Management
• Low-Level Hardware Interaction

Game Logic

• Two paddles are placed at the top and bottom of the screen.
• The ball moves diagonally across the screen.
• Players must prevent the ball from passing their paddle.
• Missing the ball awards a point to the opponent.
• First player to reach 5 points wins.

Requirements

• DOSBox or any DOS-compatible emulator
• NASM/TASM compatible assembler

Build & Run

Assemble

nasm -f bin pingpong.asm -o pingpong.com

Run

dosbox pingpong.com

Learning Outcomes

This project is a practical demonstration of:

• Interrupt handling
• Hardware-level programming
• Game development in Assembly
• Direct memory manipulation
• Real-time event processing

Author

Developed as a learning project to explore low-level game programming and x86 Assembly language.