Multiple choice

A device employing INTR line for device interrupt puts the CALL instruction on the data bus while

  1. INTA is active

  2. HOLD is active

  3. READY is active

  4. None of the above

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A Correct answer
Explanation

INTR is a signal which if enabled then microprocessor has interrupt enabled it receives high INR signal & activates INTA signal, so another request can't be accepted till CPU is busy in servicing interrupt.