Abstract: A system and method for modifying software routines is provided. The system includes a computer device and a hardware device. The hardware device is in communication with the computer device, and includes a memory device that stores at least one of an initialized software routine and a non-initialized software routine, and a processor executes the at least one initialized software routine. At least one of the initialized and non-initialized software routines are modified by the steps including generating an authorization code by the computer device, wherein the authorization code is unique to the hardware device, loading the authorization code, and authenticating the authorization code. The modification steps further include creating a current software enable matrix, communicating the current software enable matrix, overwriting a previous software enable matrix with the current software enable matrix, and modifying at least one software routine.

Abstract: The reprogramming system provides for field reprogramming of programmable devices. In particular, a key encryption system generates reprogramming components used to install reprogram data on programmable devices located in the field. The reprogramming component includes an encrypted access key file necessary to unlock the programmable device and reprogram software files and data installed on the programmable device. The encrypted access key file is encrypted as a function of a check value derived from the reprogram data, ensuring that permission to reprogram the programmable device is tied to the specific data being installed. A key decryption system that receives a reprogramming component generates the check value from the program data, decrypts the key access file, unlocks the programmable device, and installs the software files and/or program data.

Abstract: A navigation system is provided for offering navigational assistance to a mobile user. The navigation system receives GPS position information signals which are processed to determine current position latitude and longitude coordinates and direction of travel. A destination database includes a plurality of categorized destinations and corresponding destination position coordinates pertaining to the destinations. The destination database is stored on an interfacable memory card and contains menu categories and subcategories for classifying the destinations and additional text information pertaining to the destinations. User selectable menu controls enable the user to sequence through the menu of categories and destinations and select a desired destination. This is easily accomplished by rotating a rotary pushbutton to view category and destination selections and depressing the rotary pushbutton to select the selection shown.

Abstract: A navigation system is provided for offering navigational assistance to a mobile user. The navigation system receives GPS position information signals which are processed to determine current position latitude and longitude coordinates and direction of travel. A destination data base includes destination related information preferably stored on an interfacable memory card and contains menu categories and subcategories for classifying destinations and text information. The memory card may include a user modifiable data base. Data information is provided with a data identification code which is required to match the user identification code assigned to a given system for authorized access thereto. Such data could be provided for a period of time set to expire. User selectable menu controls enable the user to sequence through the menu of categories and destinations and select a desired destination.

Abstract: A navigation system is provided for offering navigational assistance to a mobile user. The navigation system receives GPS position information signals which are processed to determine current position latitude and longitude coordinates and direction of travel. A destination database includes a plurality of categorized destinations and corresponding destination position coordinates pertaining to the destinations. The destination database is stored on an interfacable memory card and contains menu categories and subcategories for classifying the destinations and additional text information pertaining to the destinations. User selectable menu controls enable the user to sequence through the menu of categories and destinations and select a desired destination. This is easily accomplished by rotating a rotary pushbutton to view category and destination selections and depressing the rotary pushbutton to select the selection shown.

Abstract: An audio entertainment/navigation system with updated time readings is provided especially for a mobile user. The navigation system receives GPS position information signals which are processed to determine current position latitude and longitude coordinates and direction of travel. A destination database includes a plurality of categorized destinations and corresponding destination position coordinates pertaining to the destinations. The destination database is stored on an interfacable memory card. A time change database is also included which contains time-related information such as time zone boundaries and special time change rules such as daylight saving time. The time-related information may be loaded into the system from an interfacable memory card. A time of day as referenced to a reference time and the date are also computed from the GPS signals.

Abstract: A navigation system is provided for offering navigational assistance to a mobile user. The navigation system receives GPS position information signals which are processed to determine current position latitude and longitude coordinates and direction of travel. A destination database includes a plurality of categorized destinations and corresponding destination position coordinates pertaining to the destinations. The destination database is stored on an interfacable memory card and contains menu categories and subcategories for classifying the destinations and additional text information pertaining to the destinations. User selectable menu controls enable the user to sequence through the menu of categories and destinations and select a desired destination. This is easily accomplished by rotating a rotary pushbutton to view category and destination selections and depressing the rotary pushbutton to select the selection shown.