Re: ZR and NG using 16wayOR gate?

Posted by WBahn on Jul 09, 2020; 6:35pm
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/ZR-and-NG-using-16wayOR-gate-tp4034824p4034833.html

Let's consider a toy example in which I have four bits, {A,B,C,D} and I want a logic block that outputs a 1 if and only if all four of those bits are 0. Now let's say that I've got an Or4Way gate and I apply my four inputs to that gate. Does the output do what I need? If not, what can I do to the output to make it do what I want? If you don't see it, make a truth table of all possible input combinations and then a column for what you want the output to be. Then make a column for the output of the Or4Way gate. What logical relationship is there between those last two columns?