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According to the present invention achieve program and random access memory the program code in the program code corresponding to code a method erasable random access memory program load read-only access to the electronic equipment is loaded into memory and random access memory load enable the program code memory and data processing system of communication between the beginning. Home erasable programmable read only memory for communication, will be removed at the time of the Constitution and the contents of memory memory memory erasable programmable read-only data processing in the system full of builds on the system is a reset data processing.

An advantage of the method of the present invention is a memory erasable programmable read-only for the content of this type, retrofitted can be done though all or part of the electronic device with program code is loaded. The erasable programmable read only memory of each electronic device need not exchange or any other necessary hardware, the present invention process to update the memory content measures.

In an embodiment of the method of the present invention, an area at least remove the EPROM, erasable programmable read-only access so that except in memory, and an applet in the data processing system through communication between EPROM and EPROM that can not be ruled clearly are stored. The advantage of this method is that a state that was already deleted out of EPROM and RAM has also been laid off due to power failure, for example, electronic means of communication or data processing system EPROM clearly Excluded from the store should define the program in order to use the method to update the contents of EPROM are easily absorbed and then electronic storage apparatus.BM disclosure Wall Art Bulletin, before the state can also be used. 37, No, 3 March 1994, Page 503 memory erasable programmable read-only electronic device to update the description of a conventional method.