Re: Dmux

Posted by WBahn on Jul 26, 2019; 6:31pm
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/Dmux-tp4033425p4033426.html

jonzzzsat wrote

I have partial understanding of how to deduce the chip implementation. But I am still uncertain of how to use the algebra well.

K-maps or canonical forms I have tried to make sense of.

here goes:

in=Not(sel)AND(a)OR       so      0=(0.a)      
in=(sel)AND(b)                so      1=(1.b)

You seem to be confusing inputs and outputs. In the DMux, you have an input signal called 'in', and input signal called 'sel', and two output signals called 'a' and 'b'. So your logic equations should be of the form

a = some logic involving 'sel' and 'in'