This is lesson 5 of a multi-part lesson teaching ANYONE that can use a computer the fundamental information needed to hack arcade ROMS. These lessons will teach one at a time the individual skills needed to hack arcade ROMS and ultimately bring all these steps together to do some hacks such as adding a free play option. While we focus on 1980s arcade games, these same concepts can be used for console based systems such as Nintendo etc.

In this lesson I will show you how to ensure you never lose credits after you start a game, this  along with always having credits to start with completes the functional requirements for creating a freeplay hack.