HW5.md

Bit

/**

* 1-bit register.
* If load[t] == 1 then out[t+1] = in[t]
*                 else out[t+1] = out[t] (no change)
*/

CHIP Bit {
    IN in, load;
    OUT out;

PARTS:
Mux(a=t1, b=in, sel=load, out=w1);
DFF(in=w1, out=t1, out=out);
}

Register

/**
* 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]);

}

Ram8

 /**
* Memory of 8 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 after the next time step.)
*/

CHIP RAM8 {
    IN in[16], load, address[3];
    OUT out[16];

PARTS:
 DMux8Way(in=load,sel=address,a=a,b=b,c=c,d=d,e=e,f=f,g=g,h=h);

Register(in=in,load=a,out=oa);
Register(in=in,load=b,out=ob);
Register(in=in,load=c,out=oc);
Register(in=in,load=d,out=od);
Register(in=in,load=e,out=oe);
Register(in=in,load=f,out=of);
Register(in=in,load=g,out=og);
Register(in=in,load=h,out=oh);

Mux8Way16(a=oa,b=ob,c=oc,d=od,e=oe,f=of,g=og,h=oh,sel=address,out=out);
}