Arcade game machines rely on specific types of memory to store and process game data, ensuring smooth gameplay and immersive experiences. The most common types of memory used in these machines are:

1. ROM (Read-Only Memory): This non-volatile memory stores the game's permanent code and graphics. Classic arcade games like Pac-Man and Space Invaders used ROM chips to retain data even when powered off.

2. RAM (Random Access Memory): Volatile memory that temporarily holds game data during play, such as player scores and sprite positions. It allows for quick access and real-time updates.

3. EEPROM (Electrically Erasable Programmable ROM): Used in later arcade systems for saving high scores or game settings without requiring a battery backup.

4. Battery-Backed RAM: Some arcade games use small amounts of RAM with a battery to preserve settings or progress when turned off.

These memory types work together to deliver the fast-paced, responsive gameplay that defines arcade classics. Understanding them helps in repairing or preserving vintage arcade hardware.