Importance

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Abstract

Devices and Methods are disclosed for portable devices having a GPS receiver for obtaining location data, a memory for retrieving map data, and which display integrated map and location data. In certain embodiments the device is based upon a generic portable host chassis, such as a PDA having an expansion bus interface such as a CompactFlash interface, and the GPS receiver and map storage functionality are provided by a removable expansion module that serves to customize the portable host as a GPS system. In such removable expansion module embodiments, the GPS receiver location data and the memory may data are transferred from the removable expansion module to the portable host over the expansion interface. In certain removable expansion module embodiments, the expansion interface is a first-level expansion interface, the removable expansion module is a first-level removable expansion module, and the memory is a second-level removable expansion module coupled to the first-level removable expansion module via a second-level expansion interface.

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First Claim