zr and ng bits on the ALU output

Posted by Malco on
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/zr-and-ng-bits-on-the-ALU-output-tp3581216.html

Hey all,
I bought this book to get rid of some holes in my knowledge. So far I'm enjoying it.

SPOILER ALERT

I went through chapter 1 and most of chapter 2 smoothly, but the discussion never mentions the ZR nor the NG output bits of the ALU.

so, NG is the leftmost bit of OUT, that was easy. What about ZR? should I sum all other bits one by one?