Computer architecture on the user level is defined by the data format and instruction set the CPU offers. How it is implemented is another level. I don't know h

Computer architecture on the user level is defined by the data format and instruction set the CPU offers. How it is implemented is another level. I don't know how some Intel i7 is implemented, but it probably has writable microcode and some very different architecture inside. That Intel hides the microcode and the CADR didn't is just another detail.