Patent ID: 6067500
Filing Date: 2000-05-23
Classification: G06F

Abstract:
A navigation system designed to perform a route search to a destination and provide route guidance, comprising:an external storage device in which navigation data and a program for performing the route search and the route guidance have been stored; anda central processing unit for performing the route search and the route guidance based on said navigation data by executing said program,wherein said central processing unit comprises nonvolatile memory means for storing the program, comparison means for comparing version data of a program stored in said nonvolatile memory means with version data of the program stored in said external storage device, and program reading means for reading said program from said external storage device and storing said program to said nonvolatile memory means, wherein it is judged whether to read part or all of the program stored in said external storage device and to store said program to said nonvolatile memory means based on a result of a comparison by said comparison means, and the program stored in said nonvolatile memory means is executed using the navigation data stored in said external storage device.