A good example of ROM in the computer is the computer BIOS, a PROM 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, Gameboy, 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.Today, ROM-type storage media is still used and continues to be improved upon for better performance and storage capacity
Computer RAM:
RAM chips are also used in computers, as well as other devices, to store information and run programs on the computer because RAM is one of the fastest memory in your computer. For example, the Internet browser you are using to read this page has been loaded into memory and is running from memory. However, as mentioned earlier, any information stored in the RAM chip is lost if the computer is turned off or loses power
Difference between RAM & ROM
- A ROM chip is non-volatile 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 volatile 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.
- A ROM chip is used primarily in the start up 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.
- Write a data to a ROM chip is a slow process, where writting data in RAM chip is a fast process.
- A RAM chip can store multiple gigabyte(GB) of data,upto 16 GB or more per chip. A ROM chip can store only several megabytes (MB) of data, upto 4mb or more per chip
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