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What does rom do?

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ROM (Read-Only Memory) is a type of non-volatile memory that stores data that is permanently written during the manufacturing process and cannot be easily modified or deleted by the user. It is used to store firmware and essential system software that is required for a computer or electronic device to boot up and operate properly. ROM is also used to store BIOS (Basic Input/Output System) settings, which are necessary for the computer to communicate with its hardware components.
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ROM (Read-Only Memory)

ROM is a type of computer memory that stores data that cannot be modified or written to once it has been programmed. This makes it ideal for storing firmware, operating systems, and other essential software that needs to remain intact and protected.

Functions of ROM:

- Firmware Storage: ROM is commonly used to store firmware, which is permanent software that controls the basic functionality of hardware devices such as microcontrollers, embedded computers, and networking equipment.
- Operating System Storage: Some older computers used ROM to store the operating system, which would be loaded into the computer's RAM at startup.
- Bootstrapping: ROM is used in the boot process of computers to hold the instructions that are executed first when the computer is turned on. These instructions load the operating system and other required files into memory.
- Program Storage: ROM can be used to store essential programs that need to be readily available and protected, such as security software, diagnostic tools, and configuration files.
- Permanent Data: ROM can also be used to store permanent data, such as calibration constants or look-up tables, that do not need to be modified or updated over time.

Types of ROM:

- Masked ROM (MROM): The data is permanently programmed into the ROM during manufacturing and cannot be changed.
- Programmable ROM (PROM): The data can be programmed into the ROM once using a specialized device.
- Erasable Programmable ROM (EPROM): The data can be erased and reprogrammed using ultraviolet light.
- Electrically Erasable Programmable ROM (EEPROM): The data can be erased and reprogrammed electrically without the need for special equipment.

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