INFORMATION PROCESSOR, PROGRAM UPDATING METHOD, PROGRAM UPDATING PROGRAM, AND COMPUTER-READABLE STORAGE MEDIUM RECORDING PROGRAM UPDATING PROGRAM

PROBLEM TO BE SOLVED: To update a program of an information processor without causing a trouble in starting or operation of the processor even in case that updating to a program of new version is not normally completed. SOLUTION: The information processor 1 configured so that an arithmetic part 21 executes a main program expanded in an expansion program storage part 17 comprises a program updating part 14 updating the main program, prior to the execution of the main program expanded in the expansion program storage part 17 by the arithmetic part 21, by rewriting the main program expanded in the expansion program storage part 17 by use of patch data having differential information between the main program and the main program of new version. According to this, the processor can be perfectly started even in case of failure in updating the main program. COPYRIGHT: (C)2005,JPO&NCIPI