diff --git a/resource/Applewin.rc b/resource/Applewin.rc
index 59130c26..7aef29e5 100644
--- a/resource/Applewin.rc
+++ b/resource/Applewin.rc
@@ -257,7 +257,7 @@ BEGIN
     CONTROL         "The Free&ze's non-autostart F8 rom (Apple ][ or ][+ only)",IDC_THE_FREEZES_F8_ROM_FW,
                     "Button",BS_AUTOCHECKBOX | WS_TABSTOP,5,201,194,10
     LTEXT           "&Game I/O Connector:",IDC_STATIC,5,220,82,8
-    COMBOBOX        IDC_COMBO_GAME_IO_CONNECTOR,89,218,114,100,CBS_DROPDOWNLIST | WS_VSCROLL | WS_TABSTOP
+    COMBOBOX        IDC_COMBO_GAME_IO_CONNECTOR,80,218,128,100,CBS_DROPDOWNLIST | WS_VSCROLL | WS_TABSTOP
 END
 
 
diff --git a/source/Configuration/PageAdvanced.cpp b/source/Configuration/PageAdvanced.cpp
index 2a6786c0..acbcf0cd 100644
--- a/source/Configuration/PageAdvanced.cpp
+++ b/source/Configuration/PageAdvanced.cpp
@@ -50,7 +50,7 @@ const TCHAR CPageAdvanced::m_gameIOConnectorChoices[] =
 				"Cortechs Corp - CodeWriter\0"	/* Protection key for Dynatech Microsoftware / Cortechs Corp "CodeWriter" */
 				"Robocom Ltd - Robo 500\0"		/* Interface Module for Robocom Ltd's Robo 500 */
 				"Robocom Ltd - Robo 1000\0"		/* Interface Module for Robocom Ltd's Robo 1000 */
-				"Robocom Ltd - Robo 1500\0";	/* Interface Module for Robocom Ltd's Robo 1500 */
+				"Robocom Ltd - Robo 1500, CAD-2P\0";	/* Interface Module for Robocom Ltd's Robo 1500, Robo Systems CAD-2P */
 
 
 INT_PTR CALLBACK CPageAdvanced::DlgProc(HWND hWnd, UINT message, WPARAM wparam, LPARAM lparam)
diff --git a/source/CopyProtectionDongles.cpp b/source/CopyProtectionDongles.cpp
index 93aa6b67..a39e574a 100644
--- a/source/CopyProtectionDongles.cpp
+++ b/source/CopyProtectionDongles.cpp
@@ -131,20 +131,22 @@ int CopyProtectionDonglePDL(UINT pdl)
 	{
 		case DT_ROBOCOM500:
 		{
-			static BYTE robo500[8] = { 0x3F,0x2E,0x54,0x54,0x2E,0x22,0x72,0x17 };	// PDL3 lower bound
-			return robo500[roboComInterfaceModuleMode] + 1;
+			static BYTE robo500_lo[8] = { 0x3F,0x2E,0x54,0x54,0x2E,0x22,0x72,0x17 };	// PDL3 lower bound - see GH#1247
+			static BYTE robo500_hi[8] = { 0x6F,0x54,0x94,0x94,0x54,0x40,0xC4,0x2E };	// PDL3 upper bound - see GH#1247
+			// This mean value gives values that are very close to the actual 1000 & 1500 Module Interfaces - so assume it's similar for the 500 series.
+			return (robo500_lo[roboComInterfaceModuleMode] + robo500_hi[roboComInterfaceModuleMode] - 1) / 2;
 		}
 
 		case DT_ROBOCOM1000:
 		{
-			static BYTE robo1000[8] = { 0x17,0x72,0x22,0x2E,0x54,0x54,0x2E,0x3F };	// PDL3 lower bound
-			return robo1000[roboComInterfaceModuleMode] + 1;
+			static BYTE robo1000[8] = { 34,151,48,64,113,113,64,85 };	// Actual Module Interface values for PDL3
+			return robo1000[roboComInterfaceModuleMode];
 		}
 
 		case DT_ROBOCOM1500:
 		{
-			static BYTE robo1500[8] = { 0x72,0x17,0x2E,0x17,0x22,0x3F,0x54,0x22 };	// PDL3 lower bound
-			return robo1500[roboComInterfaceModuleMode] + 1;
+			static BYTE robo1500[8] = { 153,34,64,34,48,86,114,48 };	// Actual Module Interface values for PDL3
+			return robo1500[roboComInterfaceModuleMode];
 		}
 
 		default: