// 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/1/Or8Way.hdl
/**
 * 8-way Or gate:
 * out = in[0] Or in[1] Or ... Or in[7]
 */
CHIP Or8Way {
    IN in[8];
    OUT out;

    PARTS:
    // combine pairs
    Or(a=in[0], b=in[1], out=pair0);
    Or(a=in[2], b=in[3], out=pair1);
    Or(a=in[4], b=in[5], out=pair2);
    Or(a=in[6], b=in[7], out=pair3);
    // combine groups of pairs
    Or(a=pair0, b=pair1, out=lowGroup);
    Or(a=pair2, b=pair3, out=highGroup);
    // combine both groups
    Or(a=lowGroup, b=highGroup, out=out);
}