Importance

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Abstract

Disclosed is a non-volatile memory system which includes a first power means for providing a main power source; a read/write memory means for storing and retrieving data signals so long as power is provided; and second power means for coupling to the first power means and to the read/write memory means, the second power means including auxiliary power means for providing a second power source; the second power means further including controller means for continuously providing power to the read/write memory means from either the first power means or the auxiliary power means. In the preferred embodiment, the first power means is within a housing, said housing having a compartment for the receipt of a plug-in module, and the second power means and read/write memory means are contained within the plug-in module. Additionally, in the preferred embodiment, the memory means and the second power means exclusive of the second power source are comprised of a single integrated circuit. Furthermore, in the preferred embodiment, the power controller and memory system are coupled to a data processing system such as an electronic calculator.

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First Claim