// 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/03/1/Register.hdl



/**

 * 16-Bit register. 

 * If load[t-1]=1 then out[t] = in[t-1]

 * else out does not change (out[t] = out[t-1])

 */



CHIP Register {



    IN  in[16], load;

    OUT out[16];



    PARTS:

    Bit(in=in[0], load=load, out=out[0]);

    Bit(in=in[1], load=load, out=out[1]);

    Bit(in=in[2], load=load, out=out[2]);

    Bit(in=in[3], load=load, out=out[3]);

    Bit(in=in[4], load=load, out=out[4]);

    Bit(in=in[5], load=load, out=out[5]);

    Bit(in=in[6], load=load, out=out[6]);

    Bit(in=in[7], load=load, out=out[7]);

    Bit(in=in[8], load=load, out=out[8]);

    Bit(in=in[9], load=load, out=out[9]);

    Bit(in=in[10], load=load, out=out[10]);

    Bit(in=in[11], load=load, out=out[11]);

    Bit(in=in[12], load=load, out=out[12]);

    Bit(in=in[13], load=load, out=out[13]);

    Bit(in=in[14], load=load, out=out[14]);

    Bit(in=in[15], load=load, out=out[15]);

}