PAC-EDWARDSVarun Mehta - Mike Pierorazio - Jeffrey Cropsey

Project Overview

• Design a two player PacMan style arcade game

• Use the DE2 VGA for game visualization

• Use the DE2 I/O to Implement NES Controller Interface

System Overview

NES Controller

NES ControllerNES Controller Controller

VGA ControllerCPU

RAM Controller RAM

Top Level Entity

Currently Pressed Buttons

Player LocationsDots on BoardPlayer Scores

Pre-programmed Sprites

Display in-depth

Video (The Goal)

Video (Starting)

What We Needed For Video

• Good-looking mazes

• Player scores

• Dot + Big Macs

• Player graphics

Mazes

• Shape of maze defined in hardware

• 16x16 tiles

• Graphics chosen for tiles dynamically

• Inquire about neighboring tiles

• 6 sprites used for all maze graphics

Scores

• Custom font

• Read scores from memory

• Display outside of maze area

Dots• Dots stored in memory

• 16x16 tiles

• Read status of dots from memory

• Draw dot if appropriate

• Special graphics for Big Macs

• Similar to player sprites

Players

• Sprites stored in memory

• 16x16 sprites, 4 bits per pixel

• Color table to get pixel’s color

• Read locations of players from memory

• Can be at any arbitrary (x,y)

That’s More Like It!

NES ControlIn-Depth

NES Pin-out and signaling

Game logic Loop

• Internal copy of maze / dot array

• Main Loop

• Player 1 then Player 2

• Checks if player “eats” dot

• Moves Player

fin