The right sequence of a CPU program to input data will be:
A. Read status register
B. Check flag bit
C. Read data register
D. Transfer data to memory
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Correct answer: A. A, B, C, D
Explanation
In programmed I/O the CPU reads the status register, checks the flag bit, and when the device is ready it reads the data register and transfers the data to memory.More Computer System Architecture questions
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