Added direct GameCube controller commands to the Serial Interface emulation. Fixes the controls in MaxPlay Classic Games Volume 1 and the Action Replay disc.

Data/User/GameConfig/GNHE5d.ini

@@ -3,8 +3,8 @@
 #Values set here will override the main dolphin settings.
 [EmuState]
 #The Emulation State. 1 is worst, 5 is best, 0 is not set.
-EmulationStateId = 1
+EmulationStateId = 4
-EmulationIssues = 
+EmulationIssues = Enable the GameCube BIOS to allow the game to boot.
 [OnFrame]
 +$Nop Hack
 0x80025BA0:dword:0x60000000

Source/Core/Core/Src/HW/SI_DeviceGCController.cpp

@@ -69,6 +69,19 @@ int CSIDevice_GCController::RunBuffer(u8* _pBuffer, int _iLength)
 		*(u32*)&_pBuffer[0] = SI_GC_CONTROLLER;
 		break;
 
+	case CMD_DIRECT:
+		{
+			INFO_LOG(SERIALINTERFACE, "PAD - Direct (Length: %d)", _iLength);
+			u32 high, low;
+			GetData(high, low);
+			for (int i = 0; i < (_iLength - 1) / 2; i++)
+			{
+				_pBuffer[0 + i] = (high >> (i * 8)) & 0xff;
+				_pBuffer[4 + i] = (low >> (i * 8)) & 0xff;
+			}
+		}
+		break;
+
 	case CMD_ORIGIN:
 		{
 			INFO_LOG(SERIALINTERFACE, "PAD - Get Origin");
@@ -96,7 +109,7 @@ int CSIDevice_GCController::RunBuffer(u8* _pBuffer, int _iLength)
 	default:
 		{
 			ERROR_LOG(SERIALINTERFACE, "unknown SI command     (0x%x)", command);
-			PanicAlert("SI: Unknown command");
+			PanicAlert("SI: Unknown command (0x%x)", command);
 		}			
 		break;
 	}

Source/Core/Core/Src/HW/SI_DeviceGCController.h

@@ -31,6 +31,7 @@ private:
 	enum EBufferCommands
 	{
 		CMD_RESET		= 0x00,
+		CMD_DIRECT		= 0x40,
 		CMD_ORIGIN		= 0x41,
 		CMD_RECALIBRATE	= 0x42,
 	};