ROM BIOS

ROM BIOS

ROM BIOS stands for Read Only Memory; Basic Input/Out put System. ROM is a type of memory that stores data even when the main computer supply is turned off. So, the information that initially required to turn On or run the computer are stored on the ROM. The BIOS, software in the form of programs stored on ROM chips, is used during the startup (Boot up) routine to check out the system and prepared to run the hardware.

More recent systems use a technology called flash ROM or flash BIOS that allows code in the core chips to be updated by software available through the BIOS or motherboard supplier. BIOS (also called firmware) can be subdivided into three classes, depending upon the type of hardware it controls.

ROM Chips

·        Mask ROM

·        PROM

·        EPROM

·        EEPROM

·        Flash ROM