Memory fullness indicator
AssigneeEngineered Systems, Inc.
InventorErnest J. Salley
Life of this patent
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Abstract
A digital card reader is connected to supply input data to a random access memory corresponding to pre-coded information on cards inserted into the reader. The insertion of a card into the reader causes a binary counter to advance one binary count to address the next location in the memory for storing the data on the card. The outputs of the binary counter, which have encoded thereon the binary addresses, are further coupled to a digital-to-analog converter having an output lead on which an analog representation of the selected address appears. This output lead of the digital-to-analog converter is used to operate an analog meter, such as an ammeter, having a scale calibrated to indicate the degree of fullness of the memory as determined by the binary encoded address information.
Claims12
A system for indicating the relative location of addresses in an electronic memory including in combination:
- an electronic memory for storing data in different address locations and having a predetermined plurality of address locations therein;
- means coupled with said memory sequentially for addressing and selecting specific ones of the address locations of said electronic memory;
- and
- analog display means coupled with at least one of said memory and said addressing means for providing an indication of the relative location in said memory of the address selected by said addressing means.
A system for indicating the degree of fullness of an electronic memory including in combination:
- an electronic memory with a predetermined number of address locations for storing unique digital data at each such address location;
- a plurality of address leads coupled with corresponding address inputs to said electronic memory;
- addressing means coupled with said address leads for supplying binary encoded address signals to said memory to sequentially select individual addresses therein;
- digital-to-analog converter means coupled with said address leads for supplying a signal to an output lead therefrom;
- and
- an analog meter coupled with said output lead for providing an analog indicia of the address location selected by said addressing means.
Dependencies are inferred from the claim text.