Question: 1. Explain which way the data flow for an IN and an OUT instruction. 2. Where is the I/O port number stored for a fixed

1. Explain which way the data flow for an IN and an OUT instruction. 2. Where is the I/O port number stored for a fixed I/O instruction? 3. Where is the I/O port number stored for a variable I/O instruction?

5. To which register are data input by the 16-bit IN instruction?

8. Contrast a memory-mapped I/O system with an isolated I/O system. 9. What is the basic input interface?

27. The 82C55 has how many programmable I/O pin connections?

29. Which two 82C55 pins accomplish internal I/O port address selection?

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