Repeat 4.9.5, but now implement both of these signals. Problems 4.9.5 For the datapath from Figure 4.24,

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Repeat 4.9.5, but now implement both of these signals.

Problems 4.9.5

For the datapath from Figure 4.24, draw the logic diagram for the part of the control unit that implements just the first signal. Assume that we only need to support LW, SW, BEQ, ADD, and J (jump) instructions.


Different instructions require different control signals to be asserted in the datapath. The remaining problems in this exercise refer to the following two control signals from Figure 4.24:a. b. Control Signal 1 ALUSrc Jump Control Signal 2 Branch RegDst

Figure 4.24PC 4 Instruction [25-0] Add Read address Instruction [31-0] Instruction memory 26 Shift left 2 Instruction

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Computer Organization And Design The Hardware Software Interface

ISBN: 9780123747501

4th Revised Edition

Authors: David A. Patterson, John L. Hennessy

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