diff --git a/Machines/PCCompatible/CGA.hpp b/Machines/PCCompatible/CGA.hpp
index a72028d5d..6edbe5764 100644
--- a/Machines/PCCompatible/CGA.hpp
+++ b/Machines/PCCompatible/CGA.hpp
@@ -73,6 +73,16 @@ class CGA {
 			}
 		}
 
+		/// Sets the type of display.
+		void set_display_type(Outputs::Display::DisplayType display_type) {
+			outputter_.crt.set_display_type(display_type);
+		}
+
+		/// Gets the type of display.
+		Outputs::Display::DisplayType get_display_type() const {
+			return outputter_.crt.get_display_type();
+		}
+
 		// MARK: - Call-ins for ScanProducer.
 
 		void set_scan_target(Outputs::Display::ScanTarget *scan_target) {
@@ -92,8 +102,9 @@ class CGA {
 			CRTCOutputter() :
 				crt(910, 8, Outputs::Display::Type::NTSC60, Outputs::Display::InputDataType::Red2Green2Blue2)
 			{
-//				crt.set_visible_area(Outputs::Display::Rect(0.1072f, 0.1f, 0.842105263157895f, 0.842105263157895f));
+				crt.set_visible_area(Outputs::Display::Rect(0.097f, 0.095f, 0.82f, 0.82f));
 				crt.set_display_type(Outputs::Display::DisplayType::CompositeColour);	// TODO: needs to be a user option.
+//				crt.set_display_type(Outputs::Display::DisplayType::RGB);	// TODO: needs to be a user option.
 			}
 
 			void set_mode(uint8_t control) {
@@ -341,7 +352,7 @@ class CGA {
 		} outputter_;
 		Motorola::CRTC::CRTC6845<CRTCOutputter, Motorola::CRTC::CursorType::MDA> crtc_;
 
-		int full_clock_;
+		int full_clock_ = 0;
 };
 
 }
diff --git a/Machines/PCCompatible/MDA.hpp b/Machines/PCCompatible/MDA.hpp
index 39c450aa3..4a7e12ce1 100644
--- a/Machines/PCCompatible/MDA.hpp
+++ b/Machines/PCCompatible/MDA.hpp
@@ -222,7 +222,7 @@ class MDA {
 		} outputter_;
 		Motorola::CRTC::CRTC6845<CRTCOutputter, Motorola::CRTC::CursorType::MDA> crtc_;
 
-		int full_clock_;
+		int full_clock_ = 0;
 };
 
 }
diff --git a/Machines/PCCompatible/PCCompatible.hpp b/Machines/PCCompatible/PCCompatible.hpp
index 0362a414c..d2b8c9c41 100644
--- a/Machines/PCCompatible/PCCompatible.hpp
+++ b/Machines/PCCompatible/PCCompatible.hpp
@@ -9,6 +9,8 @@
 #ifndef PCCompatible_hpp
 #define PCCompatible_hpp
 
+#include "../../Configurable/Configurable.hpp"
+#include "../../Configurable/StandardOptions.hpp"
 #include "../../Analyser/Static/StaticAnalyser.hpp"
 #include "../ROMMachine.hpp"
 
@@ -26,6 +28,23 @@ class Machine {
 			const Analyser::Static::Target *target,
 			const ROMMachine::ROMFetcher &rom_fetcher
 		);
+
+		/// Defines the runtime options [sometimes] available for a PC.
+		class Options:
+			public Reflection::StructImpl<Options>,
+			public Configurable::DisplayOption<Options>
+		{
+			friend Configurable::DisplayOption<Options>;
+			public:
+				Options(Configurable::OptionsType) :
+					Configurable::DisplayOption<Options>(Configurable::Display::RGB)
+				{
+					if(needs_declare()) {
+						declare_display_option();
+						limit_enum(&output, Configurable::Display::RGB, Configurable::Display::CompositeColour, -1);
+					}
+				}
+		};
 };
 
 }
diff --git a/Machines/Utility/MachineForTarget.cpp b/Machines/Utility/MachineForTarget.cpp
index 8bde43eba..73f82c9cf 100644
--- a/Machines/Utility/MachineForTarget.cpp
+++ b/Machines/Utility/MachineForTarget.cpp
@@ -222,6 +222,7 @@ std::map<std::string, std::unique_ptr<Reflection::Struct>> Machine::AllOptionsBy
 	Emplace(MasterSystem, Sega::MasterSystem::Machine);
 	Emplace(MSX, MSX::Machine);
 	Emplace(Oric, Oric::Machine);
+	Emplace(PCCompatible, PCCompatible::Machine);
 	Emplace(Vic20, Commodore::Vic20::Machine);
 	Emplace(ZX8081, Sinclair::ZX8081::Machine);
 	Emplace(ZXSpectrum, Sinclair::ZXSpectrum::Machine);