// 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/DMux4Way.hdl



/**

 * 4-way demultiplexor.  The 2-bit sel input selects the output to which 

 * the in input will be channeled: 00 to a, 01 to b, 10 to c, 11 to d.

 * The other outputs are set to 0.

 */



CHIP DMux4Way {



    IN  in, sel[2];

    OUT a, b, c, d;



    PARTS:

    DMux(in=in, a=ab, b=cd, sel=sel[1]);

    DMux(in=ab, a=a, b=b, sel=sel[0]);

    DMux(in=cd, a=c, b=d, sel=sel[0]);

}