// This file is part of the materials accompanying the book 

// "The Elements of Computing Systems" by Nisan and Schocken, 

// MIT Press. Book site: www.idc.ac.il/tecs

// File name: projects/01/Mux.hdl



/** 

 * Multiplexor.  If sel=0 then out = a else out = b.

 * In other words, mux(a,b,s) = a!s + bs

 */



CHIP Mux {



    IN  a, b, sel;

    OUT out;



    PARTS:

    Not(in=sel,out=notsel);

    And(a=a, b=notsel, out=left);

    And(a=b, b=sel, out=right);

    Or(a=left, b=right, out=out);

}