Re: ZR and NG using 16wayOR gate?

Posted by WBahn on Jul 11, 2020; 10:34pm
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/ZR-and-NG-using-16wayOR-gate-tp4034824p4034847.html

guynextdoor wrote

Hi thanks for the detailed explanation, it making sense to me now. Then am I correct in understanding, If suppose the output is a 0 on a 16-bit bus, theoretically, then 8ORway gate will output a 0, we can use the NOT gate to give ZR=1.

Many thanks for your answer and explanation, it helped me a lot already

The Or8Way gate, by itself, is not enough to determine that the value on a 16-bit bus is zero. You have 16-signals to check and an Or8Way only has eight inputs.

But can you see how you can use a couple such gates (an a couple others) to check all 16 bits?