GATE | GATE-CS-2002 | Question 9

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

         
A)       is active
B)    HOLD is active
C)    READY is active
D)    None of these

(A) A
(B) B
(C) C
(D) D


Answer: (A)

Explanation: Explanation:

INTR is a signal which if enabled then microprocessor has interrupt enabled .It receives high INTR signal and activates INTA signal, So another request can’t be accepted till CPU is busy in servicing interrupt

So (A) is correct option.

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