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ISRO2011-23

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What is the meaning of $\overline{\textsf{RD}}$ signal in Intel $\textsf{8151A}?$

  1. Read (when it is low)
  2. Read (when it is high)
  3. Write (when it is low)
  4. Read and Write (when it is high)
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  1. Read (when it is low)
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