ah four registers, an ALU, and a shifter is shown in Figure 81. The Various type

Question

ah four registers, an ALU, and a shifter is shown in Figure 81. The Various types well as of microoperations. A simple bus-based he uireet transfer of data, as data Load enable Write A select B select D data A address B address Load Load Load R3 0 1 23 Decoder Register file B data A data D address Constant in Destination select MB select MUX B Address out Bus B out H select G select 4, A 0- IR Shifter IL-0 Arithmetic!ogic 1 unit (ALU) C+ ZZero Detect Function unit Data in MID select MD select-MUXD FIGURE 8-1 Block Diagram of a Generic Datapath

Explanation / Answer

Since 64 registers are used 26= 64 , hence 6 select lines are required for MUX (so A select= B select=6 lines)

and Decoder for destination select also requires 6 select lines( n to 2n= 6 to 26 line decoder).

Mux B requires 1 select line since to select line A or line B,

Mux D= 1 select line to chose between in or datain

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