ROM vs. Emulator: What's the Difference?

If you're taking your first steps into the world of emulation, it's very likely you've come across the terms ROM and emulator. Because they often appear together, many people believe they mean the same thing.

However, they serve completely different functions. One recreates the operation of a console, while the other contains the video game you want to run.

In this guide, you will discover how they differ, how they work together, and why both are essential to enjoying emulation.

ROM and emulator: two different elements

There is a very simple way to distinguish them.

• An emulator is a program that mimics a video game console.
• A ROM is a digital copy of a video game.

The emulator creates the environment where the game runs.

The ROM stores all the necessary information to play.

Alone, they are not very useful; together, they allow recreating the original console experience.

What is an emulator?

An emulator is software developed to replicate the hardware behavior of a specific console.

Its function is to simulate components such as:

• the processor;
• memory;
• the graphics system;
• the sound chip;
• other internal system functions.