nand2tetris/projects/01/Mux.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/Mux.hdl

/**
 * Multiplexor:
 * out = a if sel == 0
 *       b otherwise
 */

// COST = 8 NAND Gates

CHIP Mux {
    IN a, b, sel;
    OUT out;

    PARTS:
    Not(in=sel, out=n);
    And(a=a, b=n, out=x);
    And(a=b, b=sel, out=y);
    Or(a=x, b=y, out=out);
}