Re: DMUX4WAY

Posted by WBahn on Apr 21, 2020; 9:18pm
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/DMUX4WAY-tp4034403p4034453.html

The key to getting the mapping right is to draw a clearly labelled chart and then follow it through by hand and ask if it makes sense.

In this case, you know that a particular select bit determines if the signal is routed to one of {a,b,c,d} versus {e,f,g,h}. So which DMux makes that happen? That DMux has to get that particular select bit.

Your elegant solution is the one I was telling you about with the 1 DMux and 2 DMux4Way parts. Do you see how it matches your tree diagram that I marked up?