Input-output port decoder

Question 1: Design an Input-Output port decoder which generates the following low-bank Input-Output strobes:

00FEH, 00C8H, 00DEH, 00EEH

Question 2: Describe the given data transfer schemes:

a) Programmed I/O.
b) Interrupted I/O.
c) DMA.

Question 3: Why do we prefer interrupt driven data transfer than programmed Input-Output transfer?

Also show the complete hardware design to resolve the multiple interrupts based on priority?

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Computer Engineering: Input-output port decoder
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