cpu architecture - what is the meaning of Instruction dispatch -

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Can anyone tell me what is the exact meaning of instruction dispatch and how the registration based Architectural instruction to avoid dispatch?

Instructions include instructions for reading / reading instruction from memory and jumping to related section is.

An additional stack-based architecture will look like this: 

  I1: Load C I2: Load B i3: ADD I4: Store A   
 You assume the stack and push the result back on it (hence the name stack based architecture).  
 In a register based architecture:  
 A register-based architecture is not completely  
 Avoid getting directions, but it's their number Reduces

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