Definition of ROM
“Read Only Memory” is the full form of ROM. A ROM performs read-operation only, it can’t be written into. The information stored in a ROM is permanent. It can’t be altered by addition or erasing. So it is called ‘Non Volatile Memory’. The important data should be stored into ROM. Example – BIOS stored in ROM. The function of “Basic Input Output System” is to control the primary activities of a computer.
The Function of ROM
The functions of ROM are given below-
1) Standard programs and data that are frequently used by program.
2) Special purpose of program. such as- Boot strap loader.
Classification of ROM
ROM is classified into four categories. They are given below-
1) PROM– Programmable Read Only Memory.
2) EPROM– Erasable Programmable Read Only Memory.
3) EEPROM– Electrically Erasable Programmable Read Only Memory.
4) UVPROM– Ultra Violet Programmable Read Only Memory.