Suppose that four different four-bit numbers are to be taken from memory and added by the circuit of Figure 6-10. How many CLEAR pulses will be needed? How many TRANSFER pulses? How many LOAD pulses?

Figure 6.10

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LOAD CLEAR S31 TRANSFER> CLKD FA D >CLK CLR B₂ As 8 CO D CLK D FA CLK B₂ A₂ CLR From memory $² S₁ CLK FA D CLR B, D A₁ CLK Accumulator outputs (a) 9 So D CLK FA CLK CLR D B₂ Ao B register -Co 4-bit adder A register