@wim_v12e
I will be submitting a talk to low carbon computing. Register Machines are much less energy efficient than stack machines. if you have 32 registers, every two operand ALU instruciton requires 5 bits for both operands and 5 bits for the destnation register. 15 bits. In 16 bits I can do a whole 16 bit stack instruction. One stack instruction per clock cycle. And pipelines waste some 30% of computations when they reset.