diff --git a/projects/05/CPU.hdl b/projects/05/CPU.hdl
index 658f47a..dfd8a63 100644
--- a/projects/05/CPU.hdl
+++ b/projects/05/CPU.hdl
@@ -41,7 +41,25 @@ CHIP CPU {
     PARTS:
     // Put your code here:
 	
-	// 1. A/C-Instruction
-	Not(in=instruction[15],out=inst)
-	Mux(a=outM,)
+	
+	//Controlbus
+	// A/C-Instruction and Controlbus
+	Not(in=instruction[15],out=on);
+	OR(a=on,b=instruction[5],out=);
+	AND(a=instruction[15],b=instruction[12],out=);
+	AND(a=instruction[15],b=instruction[4],out=);
+	AND(a=instruction[15],b=instruction[3],out=);
+	AND(a=instruction[15],b=instruction[0],out=);
+	AND(a=instruction[15],b=instruction[1],out=);
+	AND(a=instruction[15],b=instruction[2],out=);
+	Not(in=zr,out=notzr);
+	Not(in=ng,out=notng);
+	AND(a=notzr,b=notng,out=);
+	AND(a=,b=,out=);
+	AND(a=,b=,out=);
+	AND(a=,b=,out=);	
+	OR(a=,b=,out=);
+	OR(a=,b=,out=);
+	
+	Mux16(a=outM,b=instruction,sel=on,out=)
 }
\ No newline at end of file