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How is a device selected in Distributed arbitration?

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How is a device selected in Distributed arbitration?

(a) By NANDing the signals passed on all the 4 lines

(b) By ANDing the signals passed on all the 4 lines

(c) By ORing the signals passed on all the 4 lines

(d) None of the mentioned

The question was asked in final exam.

My enquiry is from Bus Arbitration topic in portion Input/Output Organisation of Computer Architecture

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The correct choice is (c) By ORing the signals passed on all the 4 lines

Easy explanation: The OR output of all the 4 lines is obtained and the device with the larger value is assigned the BUS.

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