Re: using internal node as a select line

Posted by WBahn on Mar 10, 2019; 5:55am
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/using-internal-node-as-a-select-line-tp4033017p4033022.html

Yes, you are WAY overthinking it.

The spec for the ALU tells you to do something with the x and y inputs based on the zx/nx and zy/ny inputs.

It then tells you to either add the results of the operations on those two inputs or perform a bitwise AND of them based on the f input.

It then tells you to do something with the output of whichever one of those was chosen based on the no input.