1. A structure for receiving a series of input data signals and providing an output status signal identical to the input data signal and providing an output delta signal indicating if the present input data signal is the same as the previous input data signal, said structure comprising: an input terminal for receiving said input data signal; a read enable input terminal for receiving a read enable signal; a status signal output terminal for providing said output status signal; a delta signal output terminal for providing said output delta signal; first means for storing said input data signal, having an input terminal, an enable terminal, and having an output terminal coupled by buffer means to said status signal output terminal; second means for storing said previous input data signal, having an input terminal connected to said output terminal of said first means for storing, having an output terminal, and having an enable terminal connected to said read enable terminal; exclusive or means for comparing said input data signal with said previous input data signal stored within said second means for storing, and providing a comparison signal on its output lead indicating if said input data signal is identical to said previous input data signal; third means for storing said comparison signal, comprising a flip flop and latch combination, said flip flop having a set lead connected to said output lead of said exclusive or means and an output lead connected to the input lead of said latch, said latch further having an enable terminal connected to said read enable terminal, and having an output lead connected to said enable terminal of said first means for storing said output lead further being coupled by buffer means to said delta signal output terminal; fourth means for storing having an input terminal connected to said input terminal of said structure, an output terminal connected to said input terminal of said first means for storing and an enable terminal connected to said read enable terminal; and and gate means having a first input lead connected to said output lead of said latch of said third means for storing, a second input lead connected to said read enable terminal, and an output lead coupled to said reset terminal of said latch of said third means for storing for enabling said first means for storing in response to said comparison signal, thereby storing said input data signal in said first means for storing only when said input data signal and said previous input data signal are different.