/**
 * 16-bits 4-way demultiplexor:
 * {a, b, c, d} = {in, 0, 0, 0} if sel == 00
 *                {0, in, 0, 0} if sel == 01
 *                {0, 0, in, 0} if sel == 10
 *                {0, 0, 0, in} if sel == 11
 */

CHIP DMux4Way16 {
    IN in[16], sel[2];
    OUT a[16], b[16], c[16], d[16];

    PARTS:
    DMux16(in=in, sel=sel[1], a=w1, b=w2);
    DMux16(in=w1, sel=sel[0], a=a, b=b);
    DMux16(in=w2, sel=sel[0], a=c, b=d);
}