1. ABSTRACTAS THE GREAT PROGRESS in electronics technology is achievd, electronization in automotive systems is quickly advancing to satisfy the demands in various applicationsThese applications are; (1) Engine control system designed to deliver the engine's full capacity, while clearing every industrial standards. (2) Anti-skidding control system together with safety-system designed to provide the maximum safety for drivers. (3) Auto-cruise control system, transmission control system, and navigation system designed for easy driving. (4) Auto-air condition control system designed for comfortable driving. Electronization, in which microprocessors are, involved, gives a limitless number of applications, including those mentioned above.In this paper is a description on how to design a navigation system in general, plus some detailed discussion on one such system with the V25(µPD70322/320) as the CPU and the IDP (µPD72022) as a controller for the man-machine interface.
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