WIP implementing TZX support

Core/SpectrumMachine.cs

@@ -23,6 +23,7 @@ namespace Core
         public IO_Bus IoBus { get; private set; }
         public ULA Ula { get; private set; }
         public TapManager TapeDeck { get; private set; }
+        public TzxParser _tzxParser { get;  set; }
 
         // Audio (If BeeperDevice is in Desktop, you may need to move it to Core, 
         // or inject it via an interface later. For now, assuming it's accessible).
@@ -276,6 +277,8 @@ namespace Core
             ForceRet();
         }
 
+        
+
         private void ForceRet()
         {
             byte pcLow = Memory.Read(Cpu.SP);