Multi-cycle datapath

Datapath with MUXes for selection:

MUX 1: select between PC and ALUOut for memory address

Fig. 5.31

MUX 2: select between $rt and $rd for destination register address

MUX 3: select between ALUOut and memory data for write data input to register file

MUX 4: select between PC and register data A for first operand input to ALU

MUX 5: select between register data B, constant 4, sign-extended immediate,

shifted immediate for second operand input to ALU