DMux8Way.hdl

// This file is part of www.nand2tetris.org
// and the book "The Elements of Computing Systems"
// by Nisan and Schocken, MIT Press.
// File name: projects/01/DMux8Way.hdl

/**
 * 8-way demultiplexor:
 * {a, b, c, d, e, f, g, h} = {in, 0, 0, 0, 0, 0, 0, 0} if sel == 000
 *                            {0, in, 0, 0, 0, 0, 0, 0} if sel == 001
 *                            etc.
 *                            {0, 0, 0, 0, 0, 0, 0, in} if sel == 111
 */

CHIP DMux8Way {
    IN in, sel[3];
    OUT a, b, c, d, e, f, g, h;

    PARTS:
    DMux(in=in ,sel=sel[2] ,a=p ,b=q );
    DMux(in=p ,sel=sel[1] ,a=r ,b=s );
    DMux(in=q ,sel=sel[1] ,a=t ,b=u );
    DMux(in=r ,sel=sel[0] ,a=a ,b=b );
    DMux(in=s ,sel=sel[0] ,a=c ,b=d );
    DMux(in=t ,sel=sel[0] ,a=e ,b=f );
    DMux(in=u ,sel=sel[0] ,a=g ,b=h);
}