6 files changed, 51 insertions, 9 deletions
diff --git a/Game/Code/Classes/ULCD.pas b/Game/Code/Classes/ULCD.pas
index a3cdac73..52b0f96a 100644
--- a/Game/Code/Classes/ULCD.pas
+++ b/Game/Code/Classes/ULCD.pas
@@ -1,6 +1,7 @@
 unit ULCD;
 
 interface
+{$I switches.inc}
 
 type
   TLCD = class
@@ -41,16 +42,24 @@ const
 implementation
 
 uses
-  SysUtils, zlportio, UTime;
+  SysUtils,
+  {$IFDEF UseSerialPort}
+  zlportio,
+  {$ENDIF}
+  UTime;
 
 procedure TLCD.WriteCommand(B: Byte);
 // Wysylanie komend sterujacych
 begin
-  if not HalfInterface then begin
+{$IFDEF UseSerialPort}
+  if not HalfInterface then
+  begin
     zlioportwrite(Control, 0, $02);
     zlioportwrite(Data, 0, B);
     zlioportwrite(Control, 0, $03);
-  end else begin
+  end
+  else
+  begin
     zlioportwrite(Control, 0, $02);
     zlioportwrite(Data, 0, B and $F0);
     zlioportwrite(Control, 0, $03);
@@ -66,11 +75,13 @@ begin
     Sleep(2)
   else
     TimeSleep(0.1);
+{$ENDIF}
 end;
 
 procedure TLCD.WriteData(B: Byte);
 // Wysylanie danych
 begin
+{$IFDEF UseSerialPort} 
   if not HalfInterface then begin
     zlioportwrite(Control, 0, $06);
     zlioportwrite(Data, 0, B);
@@ -89,6 +100,7 @@ begin
 
   TimeSleep(0.1);
   Inc(Position);
+{$ENDIF}
 end;
 
 procedure TLCD.WriteString(S: string);
diff --git a/Game/Code/Classes/ULight.pas b/Game/Code/Classes/ULight.pas
index 1fc4aba8..b9c7af9e 100644
--- a/Game/Code/Classes/ULight.pas
+++ b/Game/Code/Classes/ULight.pas
@@ -1,5 +1,6 @@
 unit ULight;
 interface
+{$I switches.inc}
 
 type
   TLight = class
@@ -30,7 +31,11 @@ const
 implementation
 
 uses
-  SysUtils, zlportio, UTime;
+  SysUtils,
+  {$IFDEF UseSerialPort}
+  zlportio,
+  {$ENDIF}
+  UTime;
 
 constructor TLight.Create;
 begin
@@ -45,8 +50,10 @@ end;
 
 procedure TLight.SetState(State: integer);
 begin
+  {$IFDEF UseSerialPort}
   if Enabled then
     PortWriteB($378, State);
+  {$ENDIF}
 end;
 
 procedure TLight.AutoSetState;
diff --git a/Game/Code/Classes/UMain.pas b/Game/Code/Classes/UMain.pas
index 43010bde..e89b4785 100644
--- a/Game/Code/Classes/UMain.pas
+++ b/Game/Code/Classes/UMain.pas
@@ -1,8 +1,16 @@
 unit UMain;
 
 interface
+{$I switches.inc}
+
 uses SDL, UGraphic, UMusic, URecord, UTime, SysUtils, UDisplay, UIni, ULog, ULyrics, UScreenSing,
-  OpenGL12, zlportio {you can disable it and all PortWriteB calls}, ULCD, ULight, UThemes{, UScreenPopup};
+  OpenGL12,
+
+  {$IFDEF UseSerialPort}
+  zlportio {you can disable it and all PortWriteB calls},
+  {$ENDIF}
+
+  ULCD, ULight, UThemes{, UScreenPopup};
 
 type
   TPlayer = record
@@ -512,7 +520,9 @@ begin
       if (TempBeat mod 4 <> 0) then Music.PlayHihat;*)
     end;
 
-  //PortWriteB($378, LPT_1 + LPT_2 * 2); // 0 zapala
+    {$IFDEF UseSerialPort}
+      // PortWriteB($378, LPT_1 + LPT_2 * 2); // 0 zapala
+    {$ENDIF}
 end;
 
 procedure NewBeatD(Sender: TScreenSing);
diff --git a/Game/Code/Screens/UScreenSong.pas b/Game/Code/Screens/UScreenSong.pas
index 38266797..2d10c9dc 100644
--- a/Game/Code/Screens/UScreenSong.pas
+++ b/Game/Code/Screens/UScreenSong.pas
@@ -1,6 +1,7 @@
 unit UScreenSong;
 
 interface
+{$I switches.inc}
 
 uses
   UMenu, SDL, UMusic, UFiles, UTime, UDisplay, USongs, SysUtils, ULog, UThemes, UTexture, ULanguage,
@@ -344,9 +345,13 @@ begin
         end;
       SDLK_RETURN:
         begin
-          if Length(Songs.Song) > 0 then begin
-//            PortWriteB($378, 0);
-            if CatSongs.Song[Interaction].Main then begin // clicked on Category Button
+          if Length(Songs.Song) > 0 then
+          begin
+            {$IFDEF UseSerialPort}
+              // PortWriteB($378, 0);
+            {$ENDIF}
+            if CatSongs.Song[Interaction].Main then
+            begin // clicked on Category Button
 
               //Show Cat in Top Left Mod
               ShowCatTL (Interaction);
diff --git a/Game/Code/UltraStar.dpr b/Game/Code/UltraStar.dpr
index bef33632..df4846b3 100644
--- a/Game/Code/UltraStar.dpr
+++ b/Game/Code/UltraStar.dpr
@@ -3,6 +3,7 @@ program UltraStar;
 {$DEFINE TRANSLATE}
 
 {$R 'UltraStar.res' 'UltraStar.rc'}
+{$I switches.inc}
 
 uses
   //------------------------------
@@ -26,8 +27,10 @@ uses
   MidiFile     in 'lib\midi\MidiFile.PAS',
   Delphmcb     in 'lib\midi\Delphmcb.PAS',
 
+  {$IFDEF UseSerialPort}
   zlportio     in 'lib\zlportio\zlportio.pas',
   ddkint       in 'lib\zlportio\ddkint.pas',
+  {$ENDIF}
 
   avcodec      in 'lib\ffmpeg\avcodec.pas',
   avformat     in 'lib\ffmpeg\avformat.pas',
diff --git a/Game/Code/switches.inc b/Game/Code/switches.inc
new file mode 100644
index 00000000..b980e754
--- /dev/null
+++ b/Game/Code/switches.inc
@@ -0,0 +1,5 @@
+{$IFDEF FPC}
+  {$UNDEF UseSerialPort}
+{$ELSE}
+  {$DEFINE UseSerialPort}
+{$ENDIF}