In the processor diagram Figure 7.11 on the previous page: a. Why is a mux needed...
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In the processor diagram Figure 7.11 on the previous page: a. Why is a mux needed for the A3 input to register file? b. Why does the branch control signal go to an AND gate? CLK PC A RD Instruction Memory Instr PCPlus4 *** 169 MemoReg Control MemWrite Unit Branch ALUControl Op Funct CLK A1 A2 A3 WD3 ALUSIC Regst BegWrite WE3 RD1 RDZ Register File WriteRege Sign Extend Signimm SICA Sroß ALU Zero ALUResult WriteData PCBranch Figure 7.11 Complete single-cycle MIPS processor PCS CLK WE A RD Data Memory WD ReadData Result In the processor diagram Figure 7.11 on the previous page: a. Why is a mux needed for the A3 input to register file? b. Why does the branch control signal go to an AND gate? CLK PC A RD Instruction Memory Instr PCPlus4 *** 169 MemoReg Control MemWrite Unit Branch ALUControl Op Funct CLK A1 A2 A3 WD3 ALUSIC Regst BegWrite WE3 RD1 RDZ Register File WriteRege Sign Extend Signimm SICA Sroß ALU Zero ALUResult WriteData PCBranch Figure 7.11 Complete single-cycle MIPS processor PCS CLK WE A RD Data Memory WD ReadData Result
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