RAM16K.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/03/b/RAM16K.hdl

/**
 * Memory of 16K 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 RAM16K {
    IN in[16], load, address[14];
    OUT out[16];

    PARTS:
    // Put your code here:

    DMux4Way(in=load,sel=address[12..13],a=load1,b=load2,c=load3,d=load4);

    RAM4K(in=in ,load=load1 ,address= address[0..11] ,out= r4kOut1);
    RAM4K(in=in ,load=load2 ,address= address[0..11] ,out= r4kOut2);
    RAM4K(in=in ,load=load3 ,address= address[0..11] ,out= r4kOut3);
    RAM4K(in=in ,load=load4 ,address= address[0..11] ,out= r4kOut4);

    Mux4Way16(a= r4kOut1,b= r4kOut2,c= r4kOut3,d= r4kOut4,sel=address[12..13],out=out);
}