work5.md

Bit

// 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/03/a/Bit.hdl

/**
* 1-bit register:
* If load[t] == 1 then out[t+1] = in[t]
*                 else out does not change (out[t+1] = out[t])
*/

CHIP Bit {
    IN in, load;
    OUT out;

    PARTS:
    // Put your code here:
    Mux(a=x,b=in,sel=load,out=ma);
    DFF(in=ma,out=out,out=x);
}

Register

// 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/03/a/Register.hdl

/**
* 16-bit register:
* If load[t] == 1 then out[t+1] = in[t]
* else out does not change
*/

CHIP Register {
    IN in[16], load;
    OUT out[16];

    PARTS:
    // Put your code here:
    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]);
}