// 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/RAM64.hdl

/**
 * Memory of 64 registers, each 16 bit-wide. Out holds the value
 * stored at the memory location specified by address. If load==1, then 
 * the in value is loaded into the memory location specified by address 
 * (the loaded value will be emitted to out from the next time step onward).
 */

CHIP RAM64 {
    IN in[16], load, address[6];
    OUT out[16];

    PARTS:
    // Put your code here:
    DMux8Way(in=load, sel=address[3..5], a=toRAM8A,
                                         b=toRAM8B,
                                         c=toRAM8C,
                                         d=toRAM8D,
                                         e=toRAM8E,
                                         f=toRAM8F,
                                         g=toRAM8G,
                                         h=toRAM8H);

    RAM8(in=in, load=toRAM8A, address=address[0..2], out=fromRAM8A);
    RAM8(in=in, load=toRAM8B, address=address[0..2], out=fromRAM8B);
    RAM8(in=in, load=toRAM8C, address=address[0..2], out=fromRAM8C);
    RAM8(in=in, load=toRAM8D, address=address[0..2], out=fromRAM8D);
    RAM8(in=in, load=toRAM8E, address=address[0..2], out=fromRAM8E);
    RAM8(in=in, load=toRAM8F, address=address[0..2], out=fromRAM8F);
    RAM8(in=in, load=toRAM8G, address=address[0..2], out=fromRAM8G);
    RAM8(in=in, load=toRAM8H, address=address[0..2], out=fromRAM8H);

    Mux8Way16(sel=address[3..5], out=out, a=fromRAM8A,
                                          b=fromRAM8B,
                                          c=fromRAM8C,
                                          d=fromRAM8D,
                                          e=fromRAM8E,
                                          f=fromRAM8F,
                                          g=fromRAM8G,
                                          h=fromRAM8H);
}