ALU Completed

Posted by Ken Singleotn on Dec 07, 2012; 11:13am
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/ALU-Completed-tp4025805.html

I built my ALU and when I came to run it in the Simulator I realised I was trying to use a part that was not in the course and that I had not created - a DMux16. So I built the part anyway and used my design and the ALU all works. Is this legitimate or am I obliged to use only the parts created in the course? My ALU comprises 18 parts, 8 different parts. I am also aware that if I had combined some of the parts I used into new parts, then the ALU part count could be significantly reduced. Again, is this what I should expect or have I done the ALU incorrectly?