Re: ALU Help
Posted by
snowkel on
Sep 14, 2016; 7:11am
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/ALU-Help-tp4030242p4030254.html
I drew up a truth table for the AND gate and I think I'm starting to get what you mean by 0 AND 1 (or at least I hope I do). If one of the inputs is 0 and the other 1, then the out is 0.
http://imgur.com/a/Zb0O7Therefore meaning that 1 AND 0 = 0? I'm not sure how to expand upon this logic to reach 00 AND 11. But since it would require both of the inputs to be "on" for 00 AND 11 = 11, I'm guessing that 00 (off) AND 11 (on) = 00 ?
Edit: I tried searching through the book for any more info on the bit-wise AND but the book doesn't give any additional details other than the fact that this chip has already been built. I was able to fill out the rest of the worksheet except for the sections where the f bit is 0.