Microcomputer processing approach for a non-volatile TV station memory tuning system

A broadcast receiver tuning system for tuning said broadcast receiver to a selected frequency comprising:

• a first memory matrix for storing digital tune words corresponding to said selected frequency,
• means for generating a binary address for addressing said digital tune word from said first memory,
• means for storing said binary address and said addressed digital tune words operably associated with said first memory and said means for generating said binary address,
• means connected to said address and tune word storing means for incrementing and decrementing said addressed digital tune word for updating said digital tune word,
• means responsive to said binary address for outputting selected binary data from a second memory matrix, said binary data used for incrementing and decrementing said addressed digital tune word,
• means connected to said incrementing and decrementing means for providing a plurality of operating instructions and logic functions operative for updating said digital tune word,
• means for inputting control functions operably associated with said means for providing a plurality of operating instructions, and
• means for converting said addressed digital tune word into an analog voltage operative to tune said broadcast receiver to said selected frequency.

A television tuning system for tuning said television to a selected VHF and UHF channel comprising:

• a first memory matrix for storing digital tune words corresponding to said VHF and UHF channels,
• means for generating a binary address on a multibus line for outputting said digital tune words from said first memory,
• a shift register operably associated with said first memory and said means for generating a binary address for storing said digital tune word and said binary address,
• an arithmetic logic unit for incrementing and decrementing said digital tune word stored in said serial shift register in updating said digital tune word,
• means for providing a plurality of operating instructions and logic functions operative in updating said digital tune word,
• a second memory matrix for storing binary data used in incrementing and decrementing said digital tune word, said second memory matrix responsive to said binary address and said operating instructions, said second memory matrix also operably associated with said arithmetic logic unit,
• an input logic status switch for inputting control functions operably associated with said means for providing a plurality of operating instructions,
• a pulse width modulator responsive to said digital tune word stored in said shift register for outputting a digital signal proportional to said digital tune word, and
• means for converting said digital signal to an analog voltage operative to tune said television to said selected UHF or VHF channel.