Hi I have made an ALU logic gate from a circuit diagram and have been having trouble. I have gone through it and I have even made circuit simulations on other programs to confirm that what i did in TPT was wrong. It seems that when I put in inputs to f0 and f1, i get an output in the correct and incorrect area. (at the top there is an OR gate with 4 inputs, and it is the third input that shouldn't be... inputting.)