ROM

Short for Read-Only Memory, ROM is a type of "built-in" memory that is used with computers and other electronic devices. As the name indicates, data stored in ROM may only be read; it is either modified with extreme difficulty or not at all. ROM is mostly used for updates. A simple example of ROM is the cartridge used with video game; which allows one system to run multiple games. Another example of ROM is, which is a programmable ROM used for the, as shown in the picture.

What is the difference between ROM and RAM?

There is one major difference between a ROM and a RAM chip. A ROM chip is storage and does not require a constant source of power to retain information stored on it. When power is lost or turned off, a ROM chip will keep the information stored on it. In contrast, a RAM chip is and requires a constant source of power to retain information. When power is lost or turned off, a RAM chip will lose the information stored on it.

Other differences between a ROM and a RAM chip include:

• A ROM chip is used primarily in the startup process of a computer, whereas a RAM chip is used in the normal operations of a computer after starting up and loading the operating system.
• Writing data to a ROM chip is a slow process, whereas writing data to a RAM chip is a faster process
• A RAM chip can store multiple gigabytes (GB) of data, up to 16 GB or more per chip; A ROM chip typically stores only several megabytes (MB) of data, up to 4 MB or more per chip

Computer ROM

A good example of ROM in the computer is the computer, a chip that stores the programming needed to begin the initial computer start up process. Using a non-volatile storage is the only way to begin the start up process for computers and other devices that use a similar start up process. ROM chips are also used in gaming system cartridges, like the original Nintendo, Game boy, Sega Genesis, and a number of others. The game cartridge stores the game programming on a ROM chip that is read by the game console when the cartridge is inserted into the console.