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:
    DMux4Way(in=load, sel=address[12..13], a=loadA, b=loadB, c=loadC, d=loadD);
    RAM4K(in=in, load=loadA, address=address[0..11], out=outA);
    RAM4K(in=in, load=loadB, address=address[0..11], out=outB);
    RAM4K(in=in, load=loadC, address=address[0..11], out=outC);
    RAM4K(in=in, load=loadD, address=address[0..11], out=outD);
    Mux4Way16(a=outA, b=outB, c=outC, d=outD, sel=address[12..13], out=out);
}