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
