Question: 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

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.

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