US Patent 7484085 Booting method and a computer using the booting method

A booting method is implemented in a computer system including a processor, a read-only memory (ROM), a main memory, and a storage device. The ROM stores a loader program, a first file name corresponding to a kernel and a file system of a first operating system, and a second file name corresponding to a kernel and a file system of a second operating system. When the computer boots, the processor first reads and executes instructions from the ROM to initiate the computer system. If the storage device comprises an operating system the kernel file name and file system of which are same as the first operating system or the second operating system, the computer loads the operating system kernel to the main memory for execution.