@mniip(View Post) Suppose the command is register to register and there are 4 registers. Suppose the binary for the register command is 100000 or something like that. Then the processor will recognize the command with the decoder and automatically send the next 2 commands to the register to register function. Suppose these 2 commands are 000000(A) and 000001(B). Then the processor will know it needs to switch register A and B.
@mniip(View Post) Not exactly, the reg to reg command will tell the processor to read the next 2 lines of the program which will then be redirected to the register unit and then decoded to find the desired registers.