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QUESTION 3 A.Interface the 8279 so that it functions at 8-bit I/O ports 40H-7FH. Use the 74LS138 as a decoder and use either the upper

QUESTION 3

A.Interface the 8279 so that it functions at 8-bit I/O ports 40H-7FH. Use the 74LS138 as a

decoder and use either the upper or lower data bus

B.Interface a 16-key keyboard and an 8-digit numeric display to the 8279.

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