Compile to bytecode

include/execute/registers.hpp

@@ -1,19 +1,14 @@
 #pragma once
+#include <cstddef>
 
 namespace Execute
 {
 	struct Registers
 	{
-		union
-		{
-			struct
-			{
-				int A;
-				int B;
-				int C;
-				int D;
-			};
-			int registers[4];
-		};
+		int A, B, C, D;
+		std::size_t programCounter;
+		std::size_t stackPointer;
+
+		// TODO status registers?
 	};
 }