Computing Dictionary
boot block definition
operating system A program on a
hard disk,
floppy disk or other media, which is loaded when the computer is turned on or rebooted and which controls the next phase of loading the actual
operating system. The loading and execution of the boot block is usually controlled by
firmware in
ROM or
PROM. It may be at some fixed location possibly or may be pointed to by the
master boot record.
(2009-05-19)