Backward compatible boot system for a computer

摘要

The invention relates to a computer system including a mass storage unit, the mass storage unit comprising : a first portion which contains a first operating system; a second portion distinct from the first portion; wherein: the second portion stores the value of an address comprised in the first portion and at which a boot record of the first operating system is located; the first portion has a sub-portion containing a second operating system, said sub-portion being declared in the first operating system as only one file, the second portion further stores the value of another address comprised in the first portion and which is the address of a boot record of the second operating system, whereby the second operating system can be activated without the first operating system being active <IMAGE>