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Remember the Boolean expressions for the flags. Use them to solve this problem. negative = out[31] zero = (out[31] + out[30] + ... + out[1]
Remember the Boolean expressions for the flags. Use them to solve this problem. negative = out[31] zero = (out[31] + out[30] + ... + out[1] + out[0])' overflow = c_out[31] XOR C_out[30] Also remember that control[0] controls the adder_subtractor in the ALU. control out= Overflow Zero Negative 000 32 undefined 001 undefined 010 A+B 32 011 A-B out 100 A AND B 101 A OR B 32 110 A NOR B control 3 111 A XOR B For the ALU defined above, determine the values of the overflow, negative, and zero flags for the following values of A, B, and control. control = 011 A = Oxa999c26f B = Oxd01ea86e Overflow = Negative = ? Zero =
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