Basic functions of a ROM

By Tom H

What is a ROM?

ROM is Read Only Memory. In other words, it is memory that cannot be rewritten on the fly. ROM generally comes in the form of IC chips which contain the basic functions to start/run a computer or the devices within it. The most visible form of ROM is the BIOS (think of that screen that shows up when you start your computer. When you start your computer, it accesses the BIOS which tells the CPU how to access the hard drive, video, and basic input devices