Merge pull request #491 from TomHarte/CPCClip

[Re-]recalibrates CRT retrace period and affected view windows.

Activity/Observer.hpp

@@ -0,0 +1,51 @@
+//
+//  ActivityObserver.h
+//  Clock Signal
+//
+//  Created by Thomas Harte on 07/05/2018.
+//  Copyright 2018 Thomas Harte. All rights reserved.
+//
+
+#ifndef ActivityObserver_h
+#define ActivityObserver_h
+
+#include <string>
+
+namespace Activity {
+
+/*!
+	Provides a purely virtual base class for anybody that wants to receive notifications of
+	'activity': any feedback from an emulated system which a user could perceive other than
+	through the machine's native audio and video outputs.
+
+	So: status LEDs, drive activity, etc. A receiver may choose to make appropriate noises
+	and/or to show or unshow status indicators.
+*/
+class Observer {
+	public:
+		/// Announces to the receiver that there is an LED of name @c name.
+		virtual void register_led(const std::string &name) = 0;
+
+		/// Announces to the receiver that there is a drive of name @c name.
+		virtual void register_drive(const std::string &name) = 0;
+
+		/// Informs the receiver of the new state of the LED with name @c name.
+		virtual void set_led_status(const std::string &name, bool lit) = 0;
+
+		enum class DriveEvent {
+			StepNormal,
+			StepBelowZero,
+			StepBeyondMaximum
+		};
+
+		/// Informs the receiver that the named event just occurred for the drive with name @c name.
+		virtual void announce_drive_event(const std::string &name, DriveEvent event) = 0;
+
+		/// Informs the receiver of the motor-on status of the drive with name @c name.
+		virtual void set_drive_motor_status(const std::string &name, bool is_on) = 0;
+
+};
+
+}
+
+#endif /* ActivityObserver_h */

Activity/Source.hpp

@@ -0,0 +1,24 @@
+//
+//  ActivitySource.h
+//  Clock Signal
+//
+//  Created by Thomas Harte on 07/05/2018.
+//  Copyright 2018 Thomas Harte. All rights reserved.
+//
+
+#ifndef ActivitySource_h
+#define ActivitySource_h
+
+#include "Observer.hpp"
+
+namespace Activity {
+
+class Source {
+	public:
+		virtual void set_activity_observer(Observer *observer) = 0;
+};
+
+}
+
+
+#endif /* ActivitySource_h */

Analyser/Dynamic/ConfidenceCounter.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 21/01/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #include "ConfidenceCounter.hpp"

Analyser/Dynamic/ConfidenceCounter.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 21/01/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef ConfidenceCounter_hpp
@@ -24,10 +24,10 @@ class ConfidenceCounter: public ConfidenceSource {
 		/*! @returns The computed probability, based on the history of events. */
 		float get_confidence() override;
 
-		/*! Records an event that implies this is the appropriate class — pushes probability up towards 1.0. */
+		/*! Records an event that implies this is the appropriate class: pushes probability up towards 1.0. */
 		void add_hit();
 
-		/*! Records an event that implies this is not the appropriate class — pushes probability down towards 0.0. */
+		/*! Records an event that implies this is not the appropriate class: pushes probability down towards 0.0. */
 		void add_miss();
 
 		/*!

Analyser/Dynamic/ConfidenceSource.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 21/01/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef ConfidenceSource_hpp

Analyser/Dynamic/ConfidenceSummary.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 21/01/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #include "ConfidenceSummary.hpp"

Analyser/Dynamic/ConfidenceSummary.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 21/01/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef ConfidenceSummary_hpp

Analyser/Dynamic/MultiMachine/Implementation/MultiCRTMachine.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 29/01/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #include "MultiCRTMachine.hpp"

Analyser/Dynamic/MultiMachine/Implementation/MultiCRTMachine.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 29/01/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef MultiCRTMachine_hpp

Analyser/Dynamic/MultiMachine/Implementation/MultiConfigurable.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 09/02/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #include "MultiConfigurable.hpp"
@@ -16,7 +16,7 @@ MultiConfigurable::MultiConfigurable(const std::vector<std::unique_ptr<::Machine
 	for(const auto &machine: machines) {
 		Configurable::Device *device = machine->configurable_device();
 		if(device) devices_.push_back(device);
-    }
+	}
 }
 
 std::vector<std::unique_ptr<Configurable::Option>> MultiConfigurable::get_options() {

Analyser/Dynamic/MultiMachine/Implementation/MultiConfigurable.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 09/02/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef MultiConfigurable_hpp

Analyser/Dynamic/MultiMachine/Implementation/MultiConfigurationTarget.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 29/01/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #include "MultiConfigurationTarget.hpp"
@@ -14,7 +14,7 @@ MultiConfigurationTarget::MultiConfigurationTarget(const std::vector<std::unique
 	for(const auto &machine: machines) {
 		ConfigurationTarget::Machine *configuration_target = machine->configuration_target();
 		if(configuration_target) targets_.push_back(configuration_target);
-    }
+	}
 }
 
 void MultiConfigurationTarget::configure_as_target(const Analyser::Static::Target *target) {

Analyser/Dynamic/MultiMachine/Implementation/MultiConfigurationTarget.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 29/01/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef MultiConfigurationTarget_hpp

Analyser/Dynamic/MultiMachine/Implementation/MultiJoystickMachine.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 09/02/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #include "MultiJoystickMachine.hpp"
@@ -25,14 +25,14 @@ class MultiJoystick: public Inputs::Joystick {
 			}
 		}
 
-		std::vector<DigitalInput> get_inputs() override {
-			std::vector<DigitalInput> inputs;
-
-			for(const auto &joystick: joysticks_) {
-				std::vector<DigitalInput> joystick_inputs = joystick->get_inputs();
-				for(const auto &input: joystick_inputs) {
-					if(std::find(inputs.begin(), inputs.end(), input) != inputs.end()) {
-						inputs.push_back(input);
+		std::vector<Input> &get_inputs() override {
+			if(inputs.empty()) {
+				for(const auto &joystick: joysticks_) {
+					std::vector<Input> joystick_inputs = joystick->get_inputs();
+					for(const auto &input: joystick_inputs) {
+						if(std::find(inputs.begin(), inputs.end(), input) != inputs.end()) {
+							inputs.push_back(input);
+						}
 					}
 				}
 			}
@@ -40,11 +40,18 @@ class MultiJoystick: public Inputs::Joystick {
 			return inputs;
 		}
 
-		void set_digital_input(const DigitalInput &digital_input, bool is_active) override {
+		void set_input(const Input &digital_input, bool is_active) override {
 			for(const auto &joystick: joysticks_) {
-				joystick->set_digital_input(digital_input, is_active);
+				joystick->set_input(digital_input, is_active);
 			}
 		}
+
+		void set_input(const Input &digital_input, float value) override {
+			for(const auto &joystick: joysticks_) {
+				joystick->set_input(digital_input, value);
+			}
+		}
+
 		void reset_all_inputs() override {
 			for(const auto &joystick: joysticks_) {
 				joystick->reset_all_inputs();
@@ -52,6 +59,7 @@ class MultiJoystick: public Inputs::Joystick {
 		}
 
 	private:
+		std::vector<Input> inputs;
 		std::vector<Inputs::Joystick *> joysticks_;
 };
 
@@ -66,7 +74,7 @@ MultiJoystickMachine::MultiJoystickMachine(const std::vector<std::unique_ptr<::M
 			joystick_machines.push_back(joystick_machine);
 			total_joysticks = std::max(total_joysticks, joystick_machine->get_joysticks().size());
 		}
-    }
+	}
 
 	for(std::size_t index = 0; index < total_joysticks; ++index) {
 		joysticks_.emplace_back(new MultiJoystick(joystick_machines, index));

Analyser/Dynamic/MultiMachine/Implementation/MultiJoystickMachine.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 09/02/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef MultiJoystickMachine_hpp

Analyser/Dynamic/MultiMachine/Implementation/MultiKeyboardMachine.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 09/02/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #include "MultiKeyboardMachine.hpp"
@@ -14,30 +14,30 @@ MultiKeyboardMachine::MultiKeyboardMachine(const std::vector<std::unique_ptr<::M
 	for(const auto &machine: machines) {
 		KeyboardMachine::Machine *keyboard_machine = machine->keyboard_machine();
 		if(keyboard_machine) machines_.push_back(keyboard_machine);
-    }
+	}
 }
 
 void MultiKeyboardMachine::clear_all_keys() {
 	for(const auto &machine: machines_) {
 		machine->clear_all_keys();
-    }
+	}
 }
 
 void MultiKeyboardMachine::set_key_state(uint16_t key, bool is_pressed) {
-    for(const auto &machine: machines_) {
-        machine->set_key_state(key, is_pressed);
-    }
+	for(const auto &machine: machines_) {
+		machine->set_key_state(key, is_pressed);
+	}
 }
 
 void MultiKeyboardMachine::type_string(const std::string &string) {
-    for(const auto &machine: machines_) {
-        machine->type_string(string);
-    }
+	for(const auto &machine: machines_) {
+		machine->type_string(string);
+	}
 }
 
 void MultiKeyboardMachine::keyboard_did_change_key(Inputs::Keyboard *keyboard, Inputs::Keyboard::Key key, bool is_pressed) {
-    for(const auto &machine: machines_) {
+	for(const auto &machine: machines_) {
 		uint16_t mapped_key = machine->get_keyboard_mapper()->mapped_key_for_key(key);
 		if(mapped_key != KeyNotMapped) machine->set_key_state(mapped_key, is_pressed);
-    }
+	}
 }

Analyser/Dynamic/MultiMachine/Implementation/MultiKeyboardMachine.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 09/02/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef MultiKeyboardMachine_hpp

Analyser/Dynamic/MultiMachine/Implementation/MultiSpeaker.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 18/02/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #include "MultiSpeaker.hpp"

Analyser/Dynamic/MultiMachine/Implementation/MultiSpeaker.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 18/02/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef MultiSpeaker_hpp

Analyser/Dynamic/MultiMachine/MultiMachine.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 28/01/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #include "MultiMachine.hpp"
@@ -22,6 +22,10 @@ MultiMachine::MultiMachine(std::vector<std::unique_ptr<DynamicMachine>> &&machin
 	crt_machine_.set_delegate(this);
 }
 
+Activity::Source *MultiMachine::activity_source() {
+	return nullptr; // TODO
+}
+
 ConfigurationTarget::Machine *MultiMachine::configuration_target() {
 	if(has_picked_) {
 		return machines_.front()->configuration_target();
@@ -82,11 +86,11 @@ void MultiMachine::multi_crt_did_run_machines() {
 
 	DynamicMachine *front = machines_.front().get();
 	std::stable_sort(machines_.begin(), machines_.end(),
-        [] (const std::unique_ptr<DynamicMachine> &lhs, const std::unique_ptr<DynamicMachine> &rhs){
-		    CRTMachine::Machine *lhs_crt = lhs->crt_machine();
-		    CRTMachine::Machine *rhs_crt = rhs->crt_machine();
-		    return lhs_crt->get_confidence() > rhs_crt->get_confidence();
-	    });
+		[] (const std::unique_ptr<DynamicMachine> &lhs, const std::unique_ptr<DynamicMachine> &rhs){
+			CRTMachine::Machine *lhs_crt = lhs->crt_machine();
+			CRTMachine::Machine *rhs_crt = rhs->crt_machine();
+			return lhs_crt->get_confidence() > rhs_crt->get_confidence();
+		});
 
 	if(machines_.front().get() != front) {
 		crt_machine_.did_change_machine_order();

Analyser/Dynamic/MultiMachine/MultiMachine.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 28/01/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef MultiMachine_hpp
@@ -50,6 +50,7 @@ class MultiMachine: public ::Machine::DynamicMachine, public MultiCRTMachine::De
 		static bool would_collapse(const std::vector<std::unique_ptr<DynamicMachine>> &machines);
 		MultiMachine(std::vector<std::unique_ptr<DynamicMachine>> &&machines);
 
+		Activity::Source *activity_source() override;
 		ConfigurationTarget::Machine *configuration_target() override;
 		CRTMachine::Machine *crt_machine() override;
 		JoystickMachine::Machine *joystick_machine() override;

Analyser/Machines.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 24/01/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef Machines_h
@@ -13,6 +13,7 @@ namespace Analyser {
 
 enum class Machine {
 	AmstradCPC,
+	AppleII,
 	Atari2600,
 	ColecoVision,
 	Electron,

Analyser/Static/Acorn/Disk.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 18/09/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "Disk.hpp"

Analyser/Static/Acorn/Disk.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 18/09/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_Acorn_Disk_hpp
@@ -16,7 +16,7 @@ namespace Analyser {
 namespace Static {
 namespace Acorn {
 
-/// Describes a DFS- or ADFS-format catalogue(/directory) — the list of files available and the catalogue's boot option.
+/// Describes a DFS- or ADFS-format catalogue(/directory): the list of files available and the catalogue's boot option.
 struct Catalogue {
 	std::string name;
 	std::vector<File> files;

Analyser/Static/Acorn/File.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 18/09/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_Acorn_File_hpp

Analyser/Static/Acorn/StaticAnalyser.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 29/08/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "StaticAnalyser.hpp"
@@ -50,14 +50,14 @@ static std::vector<std::shared_ptr<Storage::Cartridge::Cartridge>>
 		//		1/(2^32) *
 		//		( ((2^24)-1)/(2^24)*(1/4)		+		1/(2^24)	) *
 		//		1/4
-		//	= something very improbable — around 1/16th of 1 in 2^32, but not exactly.
+		//	= something very improbable, around 1/16th of 1 in 2^32, but not exactly.
 		acorn_cartridges.push_back(cartridge);
 	}
 
 	return acorn_cartridges;
 }
 
-void Analyser::Static::Acorn::AddTargets(const Media &media, std::vector<std::unique_ptr<::Analyser::Static::Target>> &destination) {
+Analyser::Static::TargetList Analyser::Static::Acorn::GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms) {
 	std::unique_ptr<Target> target(new Target);
 	target->machine = Machine::Electron;
 	target->confidence = 0.5; // TODO: a proper estimation
@@ -121,7 +121,9 @@ void Analyser::Static::Acorn::AddTargets(const Media &media, std::vector<std::un
 		}
 	}
 
-	if(target->media.tapes.size() || target->media.disks.size() || target->media.cartridges.size()) {
-		destination.push_back(std::move(target));
+	TargetList targets;
+	if(!target->media.empty()) {
+		targets.push_back(std::move(target));
 	}
+	return targets;
 }

Analyser/Static/Acorn/StaticAnalyser.hpp

@@ -3,19 +3,21 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 29/08/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_Acorn_StaticAnalyser_hpp
 #define StaticAnalyser_Acorn_StaticAnalyser_hpp
 
 #include "../StaticAnalyser.hpp"
+#include "../../../Storage/TargetPlatforms.hpp"
+#include <string>
 
 namespace Analyser {
 namespace Static {
 namespace Acorn {
 
-void AddTargets(const Media &media, std::vector<std::unique_ptr<Target>> &destination);
+TargetList GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms);
 
 }
 }

Analyser/Static/Acorn/Tape.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 29/08/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "Tape.hpp"

Analyser/Static/Acorn/Tape.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 29/08/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_Acorn_Tape_hpp

Analyser/Static/Acorn/Target.hpp

@@ -3,13 +3,14 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 09/03/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef Analyser_Static_Acorn_Target_h
 #define Analyser_Static_Acorn_Target_h
 
 #include "../StaticAnalyser.hpp"
+#include <string>
 
 namespace Analyser {
 namespace Static {
@@ -19,6 +20,7 @@ struct Target: public ::Analyser::Static::Target {
 	bool has_adfs = false;
 	bool has_dfs = false;
 	bool should_shift_restart = false;
+	std::string loading_command;
 };
 
 }

Analyser/Static/AmstradCPC/StaticAnalyser.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 30/07/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #include "StaticAnalyser.hpp"
@@ -35,8 +35,8 @@ static bool is_implied_extension(const std::string &extension) {
 
 static void right_trim(std::string &string) {
 	string.erase(std::find_if(string.rbegin(), string.rend(), [](int ch) {
-        return !std::isspace(ch);
-    }).base(), string.end());
+		return !std::isspace(ch);
+	}).base(), string.end());
 }
 
 static std::string RunCommandFor(const Storage::Disk::CPM::File &file) {
@@ -64,14 +64,14 @@ static void InspectCatalogue(
 
 	std::vector<const Storage::Disk::CPM::File *> candidate_files;
 	candidate_files.reserve(catalogue.files.size());
-	for(auto &file : catalogue.files) {
+	for(const auto &file : catalogue.files) {
 		candidate_files.push_back(&file);
 	}
 
 	// Remove all files with untypable characters.
 	candidate_files.erase(
 		std::remove_if(candidate_files.begin(), candidate_files.end(), [](const Storage::Disk::CPM::File *file) {
-			for(auto c : file->name + file->type) {
+			for(const auto c : file->name + file->type) {
 				if(c < 32) return true;
 			}
 			return false;
@@ -80,7 +80,7 @@ static void InspectCatalogue(
 
 	// If that leaves a mix of 'system' (i.e. hidden) and non-system files, remove the system files.
 	bool are_all_system = true;
-	for(auto file : candidate_files) {
+	for(const auto &file : candidate_files) {
 		if(!file->system) {
 			are_all_system = false;
 			break;
@@ -137,13 +137,13 @@ static void InspectCatalogue(
 	std::map<std::string, int> name_counts;
 	std::map<std::string, std::size_t> indices_by_name;
 	std::size_t index = 0;
-	for(auto file : candidate_files) {
+	for(const auto &file : candidate_files) {
 		name_counts[file->name]++;
 		indices_by_name[file->name] = index;
 		index++;
 	}
 	if(name_counts.size() == 2) {
-		for(auto &pair : name_counts) {
+		for(const auto &pair : name_counts) {
 			if(pair.second == 1) {
 				target->loading_command = RunCommandFor(*candidate_files[indices_by_name[pair.first]]);
 				return;
@@ -179,7 +179,8 @@ static bool CheckBootSector(const std::shared_ptr<Storage::Disk::Disk> &disk, co
 	return false;
 }
 
-void Analyser::Static::AmstradCPC::AddTargets(const Media &media, std::vector<std::unique_ptr<Analyser::Static::Target>> &destination) {
+Analyser::Static::TargetList Analyser::Static::AmstradCPC::GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms) {
+	TargetList destination;
 	std::unique_ptr<Target> target(new Target);
 	target->machine = Machine::AmstradCPC;
 	target->confidence = 0.5;
@@ -213,7 +214,7 @@ void Analyser::Static::AmstradCPC::AddTargets(const Media &media, std::vector<st
 		system_format.catalogue_allocation_bitmap = 0xc000;
 		system_format.reserved_tracks = 2;
 
-		for(const auto &disk: media.disks) {
+		for(auto &disk: media.disks) {
 			// Check for an ordinary catalogue.
 			std::unique_ptr<Storage::Disk::CPM::Catalogue> data_catalogue = Storage::Disk::CPM::GetCatalogue(disk, data_format);
 			if(data_catalogue) {
@@ -241,4 +242,6 @@ void Analyser::Static::AmstradCPC::AddTargets(const Media &media, std::vector<st
 	// If any media survived, add the target.
 	if(!target->media.empty())
 		destination.push_back(std::move(target));
+
+	return destination;
 }

Analyser/Static/AmstradCPC/StaticAnalyser.hpp

@@ -3,22 +3,24 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 30/07/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
-#ifndef StaticAnalyser_AmstradCPC_StaticAnalyser_hpp
-#define StaticAnalyser_AmstradCPC_StaticAnalyser_hpp
+#ifndef Analyser_Static_AmstradCPC_StaticAnalyser_hpp
+#define Analyser_Static_AmstradCPC_StaticAnalyser_hpp
 
 #include "../StaticAnalyser.hpp"
+#include "../../../Storage/TargetPlatforms.hpp"
+#include <string>
 
 namespace Analyser {
 namespace Static {
 namespace AmstradCPC {
 
-void AddTargets(const Media &media, std::vector<std::unique_ptr<Target>> &destination);
+TargetList GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms);
 
 }
 }
 }
 
-#endif /* StaticAnalyser_AmstradCPC_StaticAnalyser_hpp */
+#endif /* Analyser_Static_AmstradCPC_StaticAnalyser_hpp */

Analyser/Static/AmstradCPC/Target.hpp

@@ -3,13 +3,14 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 09/03/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef Analyser_Static_AmstradCPC_Target_h
 #define Analyser_Static_AmstradCPC_Target_h
 
 #include "../StaticAnalyser.hpp"
+#include <string>
 
 namespace Analyser {
 namespace Static {
@@ -23,6 +24,7 @@ struct Target: public ::Analyser::Static::Target {
 	};
 
 	Model model = Model::CPC464;
+	std::string loading_command;
 };
 
 }

Analyser/Static/AppleII/StaticAnalyser.cpp

@@ -0,0 +1,23 @@
+//
+//  StaticAnalyser.cpp
+//  Clock Signal
+//
+//  Created by Thomas Harte on 14/04/2018.
+//  Copyright 2018 Thomas Harte. All rights reserved.
+//
+
+#include "StaticAnalyser.hpp"
+#include "Target.hpp"
+
+Analyser::Static::TargetList Analyser::Static::AppleII::GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms) {
+	auto target = std::unique_ptr<Target>(new Target);
+	target->machine = Machine::AppleII;
+	target->media = media;
+
+	if(!target->media.disks.empty())
+		target->disk_controller = Target::DiskController::SixteenSector;
+
+	TargetList targets;
+	targets.push_back(std::move(target));
+	return targets;
+}

Analyser/Static/AppleII/StaticAnalyser.hpp

@@ -0,0 +1,26 @@
+//
+//  StaticAnalyser.hpp
+//  Clock Signal
+//
+//  Created by Thomas Harte on 14/04/2018.
+//  Copyright 2018 Thomas Harte. All rights reserved.
+//
+
+#ifndef Analyser_Static_AppleII_StaticAnalyser_hpp
+#define Analyser_Static_AppleII_StaticAnalyser_hpp
+
+#include "../StaticAnalyser.hpp"
+#include "../../../Storage/TargetPlatforms.hpp"
+#include <string>
+
+namespace Analyser {
+namespace Static {
+namespace AppleII {
+
+TargetList GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms);
+
+}
+}
+}
+
+#endif /* Analyser_Static_AppleII_StaticAnalyser_hpp */

Analyser/Static/AppleII/Target.hpp

@@ -0,0 +1,37 @@
+//
+//  Target.hpp
+//  Clock Signal
+//
+//  Created by Thomas Harte on 21/04/2018.
+//  Copyright 2018 Thomas Harte. All rights reserved.
+//
+
+#ifndef Target_h
+#define Target_h
+
+#include "../StaticAnalyser.hpp"
+
+namespace Analyser {
+namespace Static {
+namespace AppleII {
+
+struct Target: public ::Analyser::Static::Target {
+	enum class Model {
+		II,
+		IIplus
+	};
+	enum class DiskController {
+		None,
+		SixteenSector,
+		ThirteenSector
+	};
+
+	Model model = Model::IIplus;
+	DiskController disk_controller = DiskController::None;
+};
+
+}
+}
+}
+
+#endif /* Target_h */

Analyser/Static/Atari/StaticAnalyser.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 15/09/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "StaticAnalyser.hpp"
@@ -180,7 +180,7 @@ static void DeterminePagingForCartridge(Analyser::Static::Atari::Target &target,
 	}
 }
 
-void Analyser::Static::Atari::AddTargets(const Media &media, std::vector<std::unique_ptr<Analyser::Static::Target>> &destination) {
+Analyser::Static::TargetList Analyser::Static::Atari::GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms) {
 	// TODO: sanity checking; is this image really for an Atari 2600?
 	std::unique_ptr<Analyser::Static::Atari::Target> target(new Analyser::Static::Atari::Target);
 	target->machine = Machine::Atari2600;
@@ -198,6 +198,7 @@ void Analyser::Static::Atari::AddTargets(const Media &media, std::vector<std::un
 			DeterminePagingForCartridge(*target, segment);
 		}
 	}
-
-	destination.push_back(std::move(target));
+	TargetList destinations;
+	destinations.push_back(std::move(target));
+	return destinations;
 }

Analyser/Static/Atari/StaticAnalyser.hpp

@@ -3,19 +3,21 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 15/09/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_Atari_StaticAnalyser_hpp
 #define StaticAnalyser_Atari_StaticAnalyser_hpp
 
 #include "../StaticAnalyser.hpp"
+#include "../../../Storage/TargetPlatforms.hpp"
+#include <string>
 
 namespace Analyser {
 namespace Static {
 namespace Atari {
 
-void AddTargets(const Media &media, std::vector<std::unique_ptr<Target>> &destination);
+TargetList GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms);
 
 }
 }

Analyser/Static/Atari/Target.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 09/03/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef Analyser_Static_Atari_Target_h

Analyser/Static/Coleco/StaticAnalyser.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 23/02/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #include "StaticAnalyser.hpp"
@@ -52,11 +52,13 @@ static std::vector<std::shared_ptr<Storage::Cartridge::Cartridge>>
 	return coleco_cartridges;
 }
 
-void Analyser::Static::Coleco::AddTargets(const Media &media, std::vector<std::unique_ptr<Target>> &destination) {
+Analyser::Static::TargetList Analyser::Static::Coleco::GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms) {
+	TargetList targets;
 	std::unique_ptr<Target> target(new Target);
 	target->machine = Machine::ColecoVision;
 	target->confidence = 1.0f - 1.0f / 32768.0f;
 	target->media.cartridges = ColecoCartridgesFrom(media.cartridges);
 	if(!target->media.empty())
-		destination.push_back(std::move(target));
+		targets.push_back(std::move(target));
+	return targets;
 }

Analyser/Static/Coleco/StaticAnalyser.hpp

@@ -3,19 +3,21 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 23/02/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_Coleco_StaticAnalyser_hpp
 #define StaticAnalyser_Coleco_StaticAnalyser_hpp
 
 #include "../StaticAnalyser.hpp"
+#include "../../../Storage/TargetPlatforms.hpp"
+#include <string>
 
 namespace Analyser {
 namespace Static {
 namespace Coleco {
 
-void AddTargets(const Media &media, std::vector<std::unique_ptr<Target>> &destination);
+TargetList GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms);
 
 }
 }

Analyser/Static/Commodore/Disk.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 13/09/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "Disk.hpp"
@@ -45,9 +45,11 @@ class CommodoreGCRParser: public Storage::Disk::Controller {
 
 			if(difference) {
 				int direction = difference < 0 ? -1 : 1;
-				difference *= 2 * direction;
+				difference *= direction;
 
-				for(int c = 0; c < difference; c++) get_drive().step(direction);
+				for(int c = 0; c < difference; c++) {
+					get_drive().step(Storage::Disk::HeadPosition(direction));
+				}
 
 				unsigned int zone = 3;
 				if(track >= 18) zone = 2;

Analyser/Static/Commodore/Disk.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 13/09/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_Commodore_Disk_hpp

Analyser/Static/Commodore/File.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 10/09/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "File.hpp"
@@ -21,7 +21,7 @@ bool Analyser::Static::Commodore::File::is_basic() {
 	//		[4 bytes: address of start of next line]
 	//		[4 bytes: this line number]
 	//		... null-terminated code ...
-	//	(with a next line address of 0000 indicating end of program)ß
+	//	(with a next line address of 0000 indicating end of program)
 	while(1) {
 		if(static_cast<size_t>(line_address - starting_address) >= data.size() + 2) break;
 

Analyser/Static/Commodore/File.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 10/09/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef File_hpp

Analyser/Static/Commodore/StaticAnalyser.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 06/09/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "StaticAnalyser.hpp"
@@ -40,7 +40,9 @@ static std::vector<std::shared_ptr<Storage::Cartridge::Cartridge>>
 	return vic20_cartridges;
 }
 
-void Analyser::Static::Commodore::AddTargets(const Media &media, std::vector<std::unique_ptr<Analyser::Static::Target>> &destination, const std::string &file_name) {
+Analyser::Static::TargetList Analyser::Static::Commodore::GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms) {
+	TargetList destination;
+
 	std::unique_ptr<Target> target(new Target);
 	target->machine = Machine::Vic20;	// TODO: machine estimation
 	target->confidence = 0.5; // TODO: a proper estimation
@@ -149,6 +151,11 @@ void Analyser::Static::Commodore::AddTargets(const Media &media, std::vector<std
 			target->region = Analyser::Static::Commodore::Target::Region::American;
 		}
 
+		// Attach a 1540 if there are any disks here.
+		target->has_c1540 = !target->media.disks.empty();
+
 		destination.push_back(std::move(target));
 	}
+
+	return destination;
 }

Analyser/Static/Commodore/StaticAnalyser.hpp

@@ -3,20 +3,21 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 06/09/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_Commodore_StaticAnalyser_hpp
 #define StaticAnalyser_Commodore_StaticAnalyser_hpp
 
 #include "../StaticAnalyser.hpp"
+#include "../../../Storage/TargetPlatforms.hpp"
 #include <string>
 
 namespace Analyser {
 namespace Static {
 namespace Commodore {
 
-void AddTargets(const Media &media, std::vector<std::unique_ptr<Target>> &destination, const std::string &file_name);
+TargetList GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms);
 
 }
 }

Analyser/Static/Commodore/Tape.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 24/08/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "Tape.hpp"

Analyser/Static/Commodore/Tape.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 24/08/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_Commodore_Tape_hpp

Analyser/Static/Commodore/Target.hpp

@@ -3,13 +3,14 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 09/03/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef Analyser_Static_Commodore_Target_h
 #define Analyser_Static_Commodore_Target_h
 
 #include "../StaticAnalyser.hpp"
+#include <string>
 
 namespace Analyser {
 namespace Static {
@@ -33,6 +34,7 @@ struct Target: public ::Analyser::Static::Target {
 	MemoryModel memory_model = MemoryModel::Unexpanded;
 	Region region = Region::European;
 	bool has_c1540 = false;
+	std::string loading_command;
 };
 
 }

Analyser/Static/Disassembler/6502.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 10/11/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "6502.hpp"

Analyser/Static/Disassembler/6502.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 10/11/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_Disassembler_6502_hpp
@@ -21,7 +21,7 @@ namespace Static {
 namespace MOS6502 {
 
 /*!
-	Describes a 6502 instruciton — its address, the operation it performs, its addressing mode
+	Describes a 6502 instruciton: its address, the operation it performs, its addressing mode
 	and its operand, if any.
 */
 struct Instruction {

Analyser/Static/Disassembler/AddressMapper.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 30/12/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #include "AddressMapper.hpp"

Analyser/Static/Disassembler/AddressMapper.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 30/12/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #ifndef AddressMapper_hpp

Analyser/Static/Disassembler/Kernel.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 31/12/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #ifndef Kernel_hpp

Analyser/Static/Disassembler/Z80.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 30/12/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #include "Z80.hpp"

Analyser/Static/Disassembler/Z80.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 30/12/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_Disassembler_Z80_hpp

Analyser/Static/DiskII/StaticAnalyser.cpp

@@ -0,0 +1,125 @@
+//
+//  StaticAnalyser.cpp
+//  Clock Signal
+//
+//  Created by Thomas Harte on 03/05/2018.
+//  Copyright 2018 Thomas Harte. All rights reserved.
+//
+
+#include "StaticAnalyser.hpp"
+
+#include "../AppleII/Target.hpp"
+#include "../Oric/Target.hpp"
+#include "../Disassembler/6502.hpp"
+#include "../Disassembler/AddressMapper.hpp"
+
+#include "../../../Storage/Disk/Track/TrackSerialiser.hpp"
+#include "../../../Storage/Disk/Encodings/AppleGCR/SegmentParser.hpp"
+
+namespace {
+
+Analyser::Static::Target *AppleTarget(const Storage::Encodings::AppleGCR::Sector *sector_zero) {
+	using Target = Analyser::Static::AppleII::Target;
+	auto *target = new Target;
+	target->machine = Analyser::Machine::AppleII;
+
+	if(sector_zero && sector_zero->encoding == Storage::Encodings::AppleGCR::Sector::Encoding::FiveAndThree) {
+		target->disk_controller = Target::DiskController::ThirteenSector;
+	} else {
+		target->disk_controller = Target::DiskController::SixteenSector;
+	}
+
+	return target;
+}
+
+Analyser::Static::Target *OricTarget(const Storage::Encodings::AppleGCR::Sector *sector_zero) {
+	using Target = Analyser::Static::Oric::Target;
+	auto *target = new Target;
+	target->machine = Analyser::Machine::Oric;
+	target->rom = Target::ROM::Pravetz;
+	target->disk_interface = Target::DiskInterface::Pravetz;
+	target->loading_command = "CALL 800\n";
+	return target;
+}
+
+}
+
+Analyser::Static::TargetList Analyser::Static::DiskII::GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms) {
+	// This analyser can comprehend disks only.
+	if(media.disks.empty()) return {};
+
+	// Grab track 0, sector 0: the boot sector.
+	auto track_zero = media.disks.front()->get_track_at_position(Storage::Disk::Track::Address(0, Storage::Disk::HeadPosition(0)));
+	auto sector_map = Storage::Encodings::AppleGCR::sectors_from_segment(
+		Storage::Disk::track_serialisation(*track_zero, Storage::Time(1, 50000)));
+
+	const Storage::Encodings::AppleGCR::Sector *sector_zero = nullptr;
+	for(const auto &pair: sector_map) {
+		if(!pair.second.address.sector) {
+			sector_zero = &pair.second;
+			break;
+		}
+	}
+
+	// If there's no boot sector then if there are also no sectors at all,
+	// decline to nominate a machine. Otherwise go with an Apple as the default.
+	TargetList targets;
+	if(!sector_zero) {
+		if(sector_map.empty()) {
+			return targets;
+		} else {
+			targets.push_back(std::unique_ptr<Analyser::Static::Target>(AppleTarget(nullptr)));
+			targets.back()->media = media;
+			return targets;
+		}
+	}
+
+	// If the boot sector looks like it's intended for the Oric, create an Oric.
+	// Otherwise go with the Apple II.
+
+	auto disassembly = Analyser::Static::MOS6502::Disassemble(sector_zero->data, Analyser::Static::Disassembler::OffsetMapper(0xb800), {0xb800});
+
+	bool did_read_shift_register = false;
+	bool is_oric = false;
+
+	// Look for a tight BPL loop reading the Oric's shift register address of 0x31c. The Apple II just has RAM there,
+	// so the probability of such a loop is infinitesimal.
+	for(const auto &instruction: disassembly.instructions_by_address) {
+		// Is this a read of the shift register?
+		if(
+			(
+				(instruction.second.operation == Analyser::Static::MOS6502::Instruction::LDA) ||
+				(instruction.second.operation == Analyser::Static::MOS6502::Instruction::LDX) ||
+				(instruction.second.operation == Analyser::Static::MOS6502::Instruction::LDY)
+			) &&
+			instruction.second.addressing_mode == Analyser::Static::MOS6502::Instruction::Absolute &&
+			instruction.second.address == 0x031c) {
+			did_read_shift_register = true;
+			continue;
+		}
+
+		if(did_read_shift_register) {
+			if(
+				instruction.second.operation == Analyser::Static::MOS6502::Instruction::BPL &&
+				instruction.second.address == 0xfb) {
+				is_oric = true;
+				break;
+			}
+
+			did_read_shift_register = false;
+		}
+	}
+
+	// Check also for calls into the 0x3xx page above 0x320, as that's where the Oric's boot ROM is.
+	for(const auto address: disassembly.outward_calls) {
+		is_oric |= address >= 0x320 && address < 0x400;
+	}
+
+	if(is_oric) {
+		targets.push_back(std::unique_ptr<Analyser::Static::Target>(OricTarget(sector_zero)));
+	} else {
+		targets.push_back(std::unique_ptr<Analyser::Static::Target>(AppleTarget(sector_zero)));
+	}
+	targets.back()->media = media;
+	return targets;
+}

Analyser/Static/DiskII/StaticAnalyser.hpp

@@ -0,0 +1,27 @@
+//
+//  StaticAnalyser.hpp
+//  Clock Signal
+//
+//  Created by Thomas Harte on 03/05/2018.
+//  Copyright 2018 Thomas Harte. All rights reserved.
+//
+
+#ifndef Analyser_Static_DiskII_StaticAnalyser_hpp
+#define Analyser_Static_DiskII_StaticAnalyser_hpp
+
+#include "../StaticAnalyser.hpp"
+#include "../../../Storage/TargetPlatforms.hpp"
+#include <string>
+
+namespace Analyser {
+namespace Static {
+namespace DiskII {
+
+TargetList GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms);
+
+}
+}
+}
+
+
+#endif /* Analyser_Static_DiskII_StaticAnalyser_hpp */

Analyser/Static/MSX/Cartridge.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 25/01/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef Cartridge_hpp

Analyser/Static/MSX/StaticAnalyser.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 25/11/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #include "StaticAnalyser.hpp"
@@ -63,14 +63,14 @@ static std::unique_ptr<Analyser::Static::Target> CartridgeTarget(
 
 	(additional audio hardware is also sometimes included, but it's implied by the banking hardware)
 */
-static std::vector<std::unique_ptr<Analyser::Static::Target>> CartridgeTargetsFrom(
+static Analyser::Static::TargetList CartridgeTargetsFrom(
 	const std::vector<std::shared_ptr<Storage::Cartridge::Cartridge>> &cartridges) {
 	// No cartridges implies no targets.
 	if(cartridges.empty()) {
 		return {};
 	}
 
-	std::vector<std::unique_ptr<Analyser::Static::Target>> targets;
+	Analyser::Static::TargetList targets;
 	for(const auto &cartridge : cartridges) {
 		const auto &segments = cartridge->get_segments();
 
@@ -261,7 +261,9 @@ static std::vector<std::unique_ptr<Analyser::Static::Target>> CartridgeTargetsFr
 	return targets;
 }
 
-void Analyser::Static::MSX::AddTargets(const Media &media, std::vector<std::unique_ptr<::Analyser::Static::Target>> &destination) {
+Analyser::Static::TargetList Analyser::Static::MSX::GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms) {
+	TargetList destination;
+
 	// Append targets for any cartridges that look correct.
 	auto cartridge_targets = CartridgeTargetsFrom(media.cartridges);
 	std::move(cartridge_targets.begin(), cartridge_targets.end(), std::back_inserter(destination));
@@ -270,7 +272,7 @@ void Analyser::Static::MSX::AddTargets(const Media &media, std::vector<std::uniq
 	std::unique_ptr<Target> target(new Target);
 
 	// Check tapes for loadable files.
-	for(const auto &tape : media.tapes) {
+	for(auto &tape : media.tapes) {
 		std::vector<File> files_on_tape = GetFiles(tape);
 		if(!files_on_tape.empty()) {
 			switch(files_on_tape.front().type) {
@@ -292,4 +294,6 @@ void Analyser::Static::MSX::AddTargets(const Media &media, std::vector<std::uniq
 		target->confidence = 0.5;
 		destination.push_back(std::move(target));
 	}
+
+	return destination;
 }

Analyser/Static/MSX/StaticAnalyser.hpp

@@ -3,19 +3,21 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 25/11/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_MSX_StaticAnalyser_hpp
 #define StaticAnalyser_MSX_StaticAnalyser_hpp
 
 #include "../StaticAnalyser.hpp"
+#include "../../../Storage/TargetPlatforms.hpp"
+#include <string>
 
 namespace Analyser {
 namespace Static {
 namespace MSX {
 
-void AddTargets(const Media &media, std::vector<std::unique_ptr<Target>> &destination);
+TargetList GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms);
 
 }
 }

Analyser/Static/MSX/Tape.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 25/12/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #include "Tape.hpp"

Analyser/Static/MSX/Tape.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 25/12/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_MSX_Tape_hpp

Analyser/Static/MSX/Target.hpp

@@ -3,13 +3,14 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 02/04/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef Analyser_Static_MSX_Target_h
 #define Analyser_Static_MSX_Target_h
 
 #include "../StaticAnalyser.hpp"
+#include <string>
 
 namespace Analyser {
 namespace Static {
@@ -17,6 +18,7 @@ namespace MSX {
 
 struct Target: public ::Analyser::Static::Target {
 	bool has_disk_drive = false;
+	std::string loading_command;
 };
 
 }

Analyser/Static/Oric/StaticAnalyser.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 11/10/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "StaticAnalyser.hpp"
@@ -23,15 +23,15 @@ using namespace Analyser::Static::Oric;
 static int Score(const Analyser::Static::MOS6502::Disassembly &disassembly, const std::set<uint16_t> &rom_functions, const std::set<uint16_t> &variable_locations) {
 	int score = 0;
 
-	for(auto address : disassembly.outward_calls)	score += (rom_functions.find(address) != rom_functions.end()) ? 1 : -1;
-	for(auto address : disassembly.external_stores)	score += (variable_locations.find(address) != variable_locations.end()) ? 1 : -1;
-	for(auto address : disassembly.external_loads)	score += (variable_locations.find(address) != variable_locations.end()) ? 1 : -1;
+	for(const auto address : disassembly.outward_calls)		score += (rom_functions.find(address) != rom_functions.end()) ? 1 : -1;
+	for(const auto address : disassembly.external_stores)	score += (variable_locations.find(address) != variable_locations.end()) ? 1 : -1;
+	for(const auto address : disassembly.external_loads)	score += (variable_locations.find(address) != variable_locations.end()) ? 1 : -1;
 
 	return score;
 }
 
 static int Basic10Score(const Analyser::Static::MOS6502::Disassembly &disassembly) {
-	std::set<uint16_t> rom_functions = {
+	const std::set<uint16_t> rom_functions = {
 		0x0228,	0x022b,
 		0xc3ca,	0xc3f8,	0xc448,	0xc47c,	0xc4b5,	0xc4e3,	0xc4e0,	0xc524,	0xc56f,	0xc5a2,	0xc5f8,	0xc60a,	0xc6a5,	0xc6de,	0xc719,	0xc738,
 		0xc773,	0xc824,	0xc832,	0xc841,	0xc8c1,	0xc8fe,	0xc91f,	0xc93f,	0xc941,	0xc91e,	0xc98b,	0xc996,	0xc9b3,	0xc9e0,	0xca0a,	0xca1c,
@@ -47,7 +47,7 @@ static int Basic10Score(const Analyser::Static::MOS6502::Disassembly &disassembl
 		0xf43c,	0xf4ef,	0xf523,	0xf561,	0xf535,	0xf57b,	0xf5d3,	0xf71a,	0xf73f,	0xf7e4,	0xf7e0,	0xf82f,	0xf88f,	0xf8af,	0xf8b5,	0xf920,
 		0xf967,	0xf960,	0xf9c9,	0xfa14,	0xfa85,	0xfa9b,	0xfab1,	0xfac7,	0xfafa,	0xfb10,	0xfb26,	0xfbb6,	0xfbfe
 	};
-	std::set<uint16_t> variable_locations = {
+	const std::set<uint16_t> variable_locations = {
 		0x0228, 0x0229, 0x022a, 0x022b, 0x022c, 0x022d, 0x0230
 	};
 
@@ -55,7 +55,7 @@ static int Basic10Score(const Analyser::Static::MOS6502::Disassembly &disassembl
 }
 
 static int Basic11Score(const Analyser::Static::MOS6502::Disassembly &disassembly) {
-	std::set<uint16_t> rom_functions = {
+	const std::set<uint16_t> rom_functions = {
 		0x0238,	0x023b,	0x023e,	0x0241,	0x0244,	0x0247,
 		0xc3c6,	0xc3f4,	0xc444,	0xc47c,	0xc4a8,	0xc4d3,	0xc4e0,	0xc524,	0xc55f,	0xc592,	0xc5e8,	0xc5fa,	0xc692,	0xc6b3,	0xc6ee,	0xc70d,
 		0xc748,	0xc7fd,	0xc809,	0xc816,	0xc82f,	0xc855,	0xc8c1,	0xc915,	0xc952,	0xc971,	0xc973,	0xc9a0,	0xc9bd,	0xc9c8,	0xc9e5,	0xca12,
@@ -72,7 +72,7 @@ static int Basic11Score(const Analyser::Static::MOS6502::Disassembly &disassembl
 		0xf88f,	0xf8af,	0xf8b5,	0xf920,	0xf967,	0xf9aa,	0xf9c9,	0xfa14,	0xfa9f,	0xfab5,	0xfacb,	0xfae1,	0xfb14,	0xfb2a,	0xfb40,	0xfbd0,
 		0xfc18
 	};
-	std::set<uint16_t> variable_locations = {
+	const std::set<uint16_t> variable_locations = {
 		0x0244, 0x0245, 0x0246, 0x0247, 0x0248, 0x0249, 0x024a, 0x024b, 0x024c
 	};
 
@@ -100,7 +100,7 @@ static bool IsMicrodisc(Storage::Encodings::MFM::Parser &parser) {
 	return !std::memcmp(signature, first_sample.data(), sizeof(signature));
 }
 
-void Analyser::Static::Oric::AddTargets(const Media &media, std::vector<std::unique_ptr<Analyser::Static::Target>> &destination) {
+Analyser::Static::TargetList Analyser::Static::Oric::GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms) {
 	std::unique_ptr<Target> target(new Target);
 	target->machine = Machine::Oric;
 	target->confidence = 0.5;
@@ -112,7 +112,7 @@ void Analyser::Static::Oric::AddTargets(const Media &media, std::vector<std::uni
 		std::vector<File> tape_files = GetFiles(tape);
 		tape->reset();
 		if(tape_files.size()) {
-			for(auto file : tape_files) {
+			for(const auto &file : tape_files) {
 				if(file.data_type == File::MachineCode) {
 					std::vector<uint16_t> entry_points = {file.starting_address};
 					Analyser::Static::MOS6502::Disassembly disassembly =
@@ -131,21 +131,25 @@ void Analyser::Static::Oric::AddTargets(const Media &media, std::vector<std::uni
 
 	if(!media.disks.empty()) {
 		// Only the Microdisc is emulated right now, so accept only disks that it can boot from.
-		for(const auto &disk: media.disks) {
+		for(auto &disk: media.disks) {
 			Storage::Encodings::MFM::Parser parser(true, disk);
 			if(IsMicrodisc(parser)) {
-				target->has_microdrive = true;
+				target->disk_interface = Target::DiskInterface::Microdisc;
 				target->media.disks.push_back(disk);
 			}
 		}
-	} else {
-		target->has_microdrive = false;
 	}
+	else
+		target->disk_interface = Target::DiskInterface::None;
 
 	// TODO: really this should add two targets if not all votes agree
-	target->use_atmos_rom = basic11_votes >= basic10_votes;
-	if(target->has_microdrive) target->use_atmos_rom = true;
+	if(basic11_votes >= basic10_votes || target->disk_interface == Target::DiskInterface::Microdisc)
+		target->rom = Target::ROM::BASIC11;
+	else
+		target->rom = Target::ROM::BASIC10;
 
+	TargetList targets;
 	if(target->media.tapes.size() || target->media.disks.size() || target->media.cartridges.size())
-		destination.push_back(std::move(target));
+		targets.push_back(std::move(target));
+	return targets;
 }

Analyser/Static/Oric/StaticAnalyser.hpp

@@ -3,19 +3,21 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 11/10/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_Oric_StaticAnalyser_hpp
 #define StaticAnalyser_Oric_StaticAnalyser_hpp
 
 #include "../StaticAnalyser.hpp"
+#include "../../../Storage/TargetPlatforms.hpp"
+#include <string>
 
 namespace Analyser {
 namespace Static {
 namespace Oric {
 
-void AddTargets(const Media &media, std::vector<std::unique_ptr<Target>> &destination);
+TargetList GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms);
 
 }
 }

Analyser/Static/Oric/Tape.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 06/11/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "Tape.hpp"

Analyser/Static/Oric/Tape.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 06/11/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_Oric_Tape_hpp

Analyser/Static/Oric/Target.hpp

@@ -3,19 +3,35 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 09/03/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef Analyser_Static_Oric_Target_h
 #define Analyser_Static_Oric_Target_h
 
+#include "../StaticAnalyser.hpp"
+#include <string>
+
 namespace Analyser {
 namespace Static {
 namespace Oric {
 
 struct Target: public ::Analyser::Static::Target {
-	bool use_atmos_rom = false;
-	bool has_microdrive = false;
+	enum class ROM {
+		BASIC10,
+		BASIC11,
+		Pravetz
+	};
+
+	enum class DiskInterface {
+		Microdisc,
+		Pravetz,
+		None
+	};
+
+	ROM rom = ROM::BASIC11;
+	DiskInterface disk_interface = DiskInterface::None;
+	std::string loading_command;
 };
 
 }

Analyser/Static/StaticAnalyser.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 23/08/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "StaticAnalyser.hpp"
@@ -11,13 +11,16 @@
 #include <algorithm>
 #include <cstdlib>
 #include <cstring>
+#include <iterator>
 
 // Analysers
 #include "Acorn/StaticAnalyser.hpp"
 #include "AmstradCPC/StaticAnalyser.hpp"
+#include "AppleII/StaticAnalyser.hpp"
 #include "Atari/StaticAnalyser.hpp"
 #include "Coleco/StaticAnalyser.hpp"
 #include "Commodore/StaticAnalyser.hpp"
+#include "DiskII/StaticAnalyser.hpp"
 #include "MSX/StaticAnalyser.hpp"
 #include "Oric/StaticAnalyser.hpp"
 #include "ZX8081/StaticAnalyser.hpp"
@@ -28,14 +31,17 @@
 
 // Disks
 #include "../../Storage/Disk/DiskImage/Formats/AcornADF.hpp"
+#include "../../Storage/Disk/DiskImage/Formats/AppleDSK.hpp"
 #include "../../Storage/Disk/DiskImage/Formats/CPCDSK.hpp"
 #include "../../Storage/Disk/DiskImage/Formats/D64.hpp"
 #include "../../Storage/Disk/DiskImage/Formats/G64.hpp"
 #include "../../Storage/Disk/DiskImage/Formats/DMK.hpp"
 #include "../../Storage/Disk/DiskImage/Formats/HFE.hpp"
 #include "../../Storage/Disk/DiskImage/Formats/MSXDSK.hpp"
+#include "../../Storage/Disk/DiskImage/Formats/NIB.hpp"
 #include "../../Storage/Disk/DiskImage/Formats/OricMFMDSK.hpp"
 #include "../../Storage/Disk/DiskImage/Formats/SSD.hpp"
+#include "../../Storage/Disk/DiskImage/Formats/WOZ.hpp"
 
 // Tapes
 #include "../../Storage/Tape/Formats/CAS.hpp"
@@ -89,8 +95,10 @@ static Media GetMediaAndPlatforms(const std::string &file_name, TargetPlatform::
 	Format("csw", result.tapes, Tape::CSW, TargetPlatform::AllTape)											// CSW
 	Format("d64", result.disks, Disk::DiskImageHolder<Storage::Disk::D64>, TargetPlatform::Commodore)		// D64
 	Format("dmk", result.disks, Disk::DiskImageHolder<Storage::Disk::DMK>, TargetPlatform::MSX)				// DMK
+	Format("do", result.disks, Disk::DiskImageHolder<Storage::Disk::AppleDSK>, TargetPlatform::DiskII)		// DO
 	Format("dsd", result.disks, Disk::DiskImageHolder<Storage::Disk::SSD>, TargetPlatform::Acorn)			// DSD
 	Format("dsk", result.disks, Disk::DiskImageHolder<Storage::Disk::CPCDSK>, TargetPlatform::AmstradCPC)	// DSK (Amstrad CPC)
+	Format("dsk", result.disks, Disk::DiskImageHolder<Storage::Disk::AppleDSK>, TargetPlatform::DiskII)		// DSK (Apple)
 	Format("dsk", result.disks, Disk::DiskImageHolder<Storage::Disk::MSXDSK>, TargetPlatform::MSX)			// DSK (MSX)
 	Format("dsk", result.disks, Disk::DiskImageHolder<Storage::Disk::OricMFMDSK>, TargetPlatform::Oric)		// DSK (Oric)
 	Format("g64", result.disks, Disk::DiskImageHolder<Storage::Disk::G64>, TargetPlatform::Commodore)		// G64
@@ -99,8 +107,10 @@ static Media GetMediaAndPlatforms(const std::string &file_name, TargetPlatform::
 			Disk::DiskImageHolder<Storage::Disk::HFE>,
 			TargetPlatform::Acorn | TargetPlatform::AmstradCPC | TargetPlatform::Commodore | TargetPlatform::Oric)
 			// HFE (TODO: switch to AllDisk once the MSX stops being so greedy)
+	Format("nib", result.disks, Disk::DiskImageHolder<Storage::Disk::NIB>, TargetPlatform::DiskII)			// NIB
 	Format("o", result.tapes, Tape::ZX80O81P, TargetPlatform::ZX8081)										// O
 	Format("p", result.tapes, Tape::ZX80O81P, TargetPlatform::ZX8081)										// P
+	Format("po", result.disks, Disk::DiskImageHolder<Storage::Disk::AppleDSK>, TargetPlatform::DiskII)		// PO
 	Format("p81", result.tapes, Tape::ZX80O81P, TargetPlatform::ZX8081)										// P81
 
 	// PRG
@@ -125,6 +135,7 @@ static Media GetMediaAndPlatforms(const std::string &file_name, TargetPlatform::
 	Format("tsx", result.tapes, Tape::TZX, TargetPlatform::MSX)												// TSX
 	Format("tzx", result.tapes, Tape::TZX, TargetPlatform::ZX8081)											// TZX
 	Format("uef", result.tapes, Tape::UEF, TargetPlatform::Acorn)											// UEF (tape)
+	Format("woz", result.disks, Disk::DiskImageHolder<Storage::Disk::WOZ>, TargetPlatform::DiskII)			// WOZ
 
 #undef Format
 #undef Insert
@@ -138,8 +149,8 @@ Media Analyser::Static::GetMedia(const std::string &file_name) {
 	return GetMediaAndPlatforms(file_name, throwaway);
 }
 
-std::vector<std::unique_ptr<Target>> Analyser::Static::GetTargets(const std::string &file_name) {
-	std::vector<std::unique_ptr<Target>> targets;
+TargetList Analyser::Static::GetTargets(const std::string &file_name) {
+	TargetList targets;
 
 	// Collect all disks, tapes and ROMs as can be extrapolated from this file, forming the
 	// union of all platforms this file might be a target for.
@@ -148,17 +159,24 @@ std::vector<std::unique_ptr<Target>> Analyser::Static::GetTargets(const std::str
 
 	// Hand off to platform-specific determination of whether these things are actually compatible and,
 	// if so, how to load them.
-	if(potential_platforms & TargetPlatform::Acorn)			Acorn::AddTargets(media, targets);
-	if(potential_platforms & TargetPlatform::AmstradCPC)	AmstradCPC::AddTargets(media, targets);
-	if(potential_platforms & TargetPlatform::Atari2600)		Atari::AddTargets(media, targets);
-	if(potential_platforms & TargetPlatform::ColecoVision)	Coleco::AddTargets(media, targets);
-	if(potential_platforms & TargetPlatform::Commodore)		Commodore::AddTargets(media, targets, file_name);
-	if(potential_platforms & TargetPlatform::MSX)			MSX::AddTargets(media, targets);
-	if(potential_platforms & TargetPlatform::Oric)			Oric::AddTargets(media, targets);
-	if(potential_platforms & TargetPlatform::ZX8081)		ZX8081::AddTargets(media, targets, potential_platforms);
+	#define Append(x) {\
+		auto new_targets = x::GetTargets(media, file_name, potential_platforms);\
+		std::move(new_targets.begin(), new_targets.end(), std::back_inserter(targets));\
+	}
+	if(potential_platforms & TargetPlatform::Acorn)			Append(Acorn);
+	if(potential_platforms & TargetPlatform::AmstradCPC)	Append(AmstradCPC);
+	if(potential_platforms & TargetPlatform::AppleII)		Append(AppleII);
+	if(potential_platforms & TargetPlatform::Atari2600)		Append(Atari);
+	if(potential_platforms & TargetPlatform::ColecoVision)	Append(Coleco);
+	if(potential_platforms & TargetPlatform::Commodore)		Append(Commodore);
+	if(potential_platforms & TargetPlatform::DiskII)		Append(DiskII);
+	if(potential_platforms & TargetPlatform::MSX)			Append(MSX);
+	if(potential_platforms & TargetPlatform::Oric)			Append(Oric);
+	if(potential_platforms & TargetPlatform::ZX8081)		Append(ZX8081);
+	#undef Append
 
 	// Reset any tapes to their initial position
-	for(auto &target : targets) {
+	for(const auto &target : targets) {
 		for(auto &tape : target->media.tapes) {
 			tape->reset();
 		}
@@ -167,9 +185,9 @@ std::vector<std::unique_ptr<Target>> Analyser::Static::GetTargets(const std::str
 	// Sort by initial confidence. Use a stable sort in case any of the machine-specific analysers
 	// picked their insertion order carefully.
 	std::stable_sort(targets.begin(), targets.end(),
-        [] (const std::unique_ptr<Target> &a, const std::unique_ptr<Target> &b) {
-		    return a->confidence > b->confidence;
-	    });
+		[] (const std::unique_ptr<Target> &a, const std::unique_ptr<Target> &b) {
+			return a->confidence > b->confidence;
+		});
 
 	return targets;
 }

Analyser/Static/StaticAnalyser.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 23/08/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef StaticAnalyser_hpp
@@ -15,6 +15,7 @@
 #include "../../Storage/Disk/Disk.hpp"
 #include "../../Storage/Cartridge/Cartridge.hpp"
 
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -43,17 +44,16 @@ struct Target {
 
 	Machine machine;
 	Media media;
-
 	float confidence;
-	std::string loading_command;
 };
+typedef std::vector<std::unique_ptr<Target>> TargetList;
 
 /*!
 	Attempts, through any available means, to return a list of potential targets for the file with the given name.
 
 	@returns The list of potential targets, sorted from most to least probable.
 */
-std::vector<std::unique_ptr<Target>> GetTargets(const std::string &file_name);
+TargetList GetTargets(const std::string &file_name);
 
 /*!
 	Inspects the supplied file and determines the media included.

Analyser/Static/ZX8081/StaticAnalyser.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 04/06/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #include "StaticAnalyser.hpp"
@@ -28,7 +28,8 @@ static std::vector<Storage::Data::ZX8081::File> GetFiles(const std::shared_ptr<S
 	return files;
 }
 
-void Analyser::Static::ZX8081::AddTargets(const Media &media, std::vector<std::unique_ptr<::Analyser::Static::Target>> &destination, TargetPlatform::IntType potential_platforms) {
+Analyser::Static::TargetList Analyser::Static::ZX8081::GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms) {
+	TargetList destination;
 	if(!media.tapes.empty()) {
 		std::vector<Storage::Data::ZX8081::File> files = GetFiles(media.tapes.front());
 		media.tapes.front()->reset();
@@ -65,4 +66,5 @@ void Analyser::Static::ZX8081::AddTargets(const Media &media, std::vector<std::u
 
 		}
 	}
+	return destination;
 }

Analyser/Static/ZX8081/StaticAnalyser.hpp

@@ -3,20 +3,21 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 04/06/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
-#ifndef StaticAnalyser_ZX8081_StaticAnalyser_hpp
-#define StaticAnalyser_ZX8081_StaticAnalyser_hpp
+#ifndef Analyser_Static_ZX8081_StaticAnalyser_hpp
+#define Analyser_Static_ZX8081_StaticAnalyser_hpp
 
 #include "../StaticAnalyser.hpp"
 #include "../../../Storage/TargetPlatforms.hpp"
+#include <string>
 
 namespace Analyser {
 namespace Static {
 namespace ZX8081 {
 
-void AddTargets(const Media &media, std::vector<std::unique_ptr<Target>> &destination, TargetPlatform::IntType potential_platforms);
+TargetList GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType potential_platforms);
 
 }
 }

Analyser/Static/ZX8081/Target.hpp

@@ -3,13 +3,14 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 09/03/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef Analyser_Static_ZX8081_Target_h
 #define Analyser_Static_ZX8081_Target_h
 
 #include "../StaticAnalyser.hpp"
+#include <string>
 
 namespace Analyser {
 namespace Static {
@@ -25,6 +26,7 @@ struct Target: public ::Analyser::Static::Target {
 	MemoryModel memory_model = MemoryModel::Unexpanded;
 	bool is_ZX81 = false;
 	bool ZX80_uses_ZX81_ROM = false;
+	std::string loading_command;
 };
 
 }

ClockReceiver/ClockReceiver.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 22/07/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #ifndef ClockReceiver_hpp
@@ -52,79 +52,79 @@
 */
 template <class T> class WrappedInt {
 	public:
-		inline WrappedInt(int l) : length_(l) {}
-		inline WrappedInt() : length_(0) {}
+		constexpr WrappedInt(int l) : length_(l) {}
+		constexpr WrappedInt() : length_(0) {}
 
-		inline T &operator =(const T &rhs) {
+		T &operator =(const T &rhs) {
 			length_ = rhs.length_;
 			return *this;
 		}
 
-		inline T &operator +=(const T &rhs) {
+		T &operator +=(const T &rhs) {
 			length_ += rhs.length_;
 			return *static_cast<T *>(this);
 		}
 
-		inline T &operator -=(const T &rhs) {
+		T &operator -=(const T &rhs) {
 			length_ -= rhs.length_;
 			return *static_cast<T *>(this);
 		}
 
-		inline T &operator ++() {
+		T &operator ++() {
 			++ length_;
 			return *static_cast<T *>(this);
 		}
 
-		inline T &operator ++(int) {
+		T &operator ++(int) {
 			length_ ++;
 			return *static_cast<T *>(this);
 		}
 
-		inline T &operator --() {
+		T &operator --() {
 			-- length_;
 			return *static_cast<T *>(this);
 		}
 
-		inline T &operator --(int) {
+		T &operator --(int) {
 			length_ --;
 			return *static_cast<T *>(this);
 		}
 
-		inline T &operator %=(const T &rhs) {
+		T &operator %=(const T &rhs) {
 			length_ %= rhs.length_;
 			return *static_cast<T *>(this);
 		}
 
-		inline T &operator &=(const T &rhs) {
+		T &operator &=(const T &rhs) {
 			length_ &= rhs.length_;
 			return *static_cast<T *>(this);
 		}
 
-		inline T operator +(const T &rhs) const			{	return T(length_ + rhs.length_);	}
-		inline T operator -(const T &rhs) const			{	return T(length_ - rhs.length_);	}
+		constexpr T operator +(const T &rhs) const			{	return T(length_ + rhs.length_);	}
+		constexpr T operator -(const T &rhs) const			{	return T(length_ - rhs.length_);	}
 
-		inline T operator %(const T &rhs) const			{	return T(length_ % rhs.length_);	}
-		inline T operator &(const T &rhs) const			{	return T(length_ & rhs.length_);	}
+		constexpr T operator %(const T &rhs) const			{	return T(length_ % rhs.length_);	}
+		constexpr T operator &(const T &rhs) const			{	return T(length_ & rhs.length_);	}
 
-		inline T operator -() const						{	return T(- length_);				}
+		constexpr T operator -() const						{	return T(- length_);				}
 
-		inline bool operator <(const T &rhs) const		{	return length_ < rhs.length_;		}
-		inline bool operator >(const T &rhs) const		{	return length_ > rhs.length_;		}
-		inline bool operator <=(const T &rhs) const		{	return length_ <= rhs.length_;		}
-		inline bool operator >=(const T &rhs) const		{	return length_ >= rhs.length_;		}
-		inline bool operator ==(const T &rhs) const		{	return length_ == rhs.length_;		}
-		inline bool operator !=(const T &rhs) const		{	return length_ != rhs.length_;		}
+		constexpr bool operator <(const T &rhs) const		{	return length_ < rhs.length_;		}
+		constexpr bool operator >(const T &rhs) const		{	return length_ > rhs.length_;		}
+		constexpr bool operator <=(const T &rhs) const		{	return length_ <= rhs.length_;		}
+		constexpr bool operator >=(const T &rhs) const		{	return length_ >= rhs.length_;		}
+		constexpr bool operator ==(const T &rhs) const		{	return length_ == rhs.length_;		}
+		constexpr bool operator !=(const T &rhs) const		{	return length_ != rhs.length_;		}
 
-		inline bool operator !() const					{	return !length_;					}
+		constexpr bool operator !() const					{	return !length_;					}
 		// bool operator () is not supported because it offers an implicit cast to int, which is prone silently to permit misuse
 
-		inline int as_int() const { return length_; }
+		constexpr int as_int() const { return length_; }
 
 		/*!
-			Severs from @c this the effect of dividing by @c divisor — @c this will end up with
+			Severs from @c this the effect of dividing by @c divisor; @c this will end up with
 			the value of @c this modulo @c divisor and @c divided by @c divisor is returned.
 		*/
-		inline T divide(const T &divisor) {
+		T divide(const T &divisor) {
 			T result(length_ / divisor.length_);
 			length_ %= divisor.length_;
 			return result;
@@ -134,7 +134,7 @@ template <class T> class WrappedInt {
 			Flushes the value in @c this. The current value is returned, and the internal value
 			is reset to zero.
 		*/
-		inline T flush() {
+		T flush() {
 			T result(length_);
 			length_ = 0;
 			return result;
@@ -147,47 +147,47 @@ template <class T> class WrappedInt {
 		int length_;
 };
 
-/// Describes an integer number of whole cycles — pairs of clock signal transitions.
+/// Describes an integer number of whole cycles: pairs of clock signal transitions.
 class Cycles: public WrappedInt<Cycles> {
 	public:
-		inline Cycles(int l) : WrappedInt<Cycles>(l) {}
-		inline Cycles() : WrappedInt<Cycles>() {}
-		inline Cycles(const Cycles &cycles) : WrappedInt<Cycles>(cycles.length_) {}
+		constexpr Cycles(int l) : WrappedInt<Cycles>(l) {}
+		constexpr Cycles() : WrappedInt<Cycles>() {}
+		constexpr Cycles(const Cycles &cycles) : WrappedInt<Cycles>(cycles.length_) {}
 };
 
-/// Describes an integer number of half cycles — single clock signal transitions.
+/// Describes an integer number of half cycles: single clock signal transitions.
 class HalfCycles: public WrappedInt<HalfCycles> {
 	public:
-		inline HalfCycles(int l) : WrappedInt<HalfCycles>(l) {}
-		inline HalfCycles() : WrappedInt<HalfCycles>() {}
+		constexpr HalfCycles(int l) : WrappedInt<HalfCycles>(l) {}
+		constexpr HalfCycles() : WrappedInt<HalfCycles>() {}
 
-		inline HalfCycles(const Cycles cycles) : WrappedInt<HalfCycles>(cycles.as_int() * 2) {}
-		inline HalfCycles(const HalfCycles &half_cycles) : WrappedInt<HalfCycles>(half_cycles.length_) {}
+		constexpr HalfCycles(const Cycles cycles) : WrappedInt<HalfCycles>(cycles.as_int() * 2) {}
+		constexpr HalfCycles(const HalfCycles &half_cycles) : WrappedInt<HalfCycles>(half_cycles.length_) {}
 
 		/// @returns The number of whole cycles completely covered by this span of half cycles.
-		inline Cycles cycles() {
+		constexpr Cycles cycles() const {
 			return Cycles(length_ >> 1);
 		}
 
 		/// Flushes the whole cycles in @c this, subtracting that many from the total stored here.
-		inline Cycles flush_cycles() {
+		Cycles flush_cycles() {
 			Cycles result(length_ >> 1);
 			length_ &= 1;
 			return result;
 		}
 
 		/// Flushes the half cycles in @c this, returning the number stored and setting this total to zero.
-		inline HalfCycles flush() {
+		HalfCycles flush() {
 			HalfCycles result(length_);
 			length_ = 0;
 			return result;
 		}
 
 		/*!
-			Severs from @c this the effect of dividing by @c divisor — @c this will end up with
+			Severs from @c this the effect of dividing by @c divisor; @c this will end up with
 			the value of @c this modulo @c divisor and @c divided by @c divisor is returned.
 		*/
-		inline Cycles divide_cycles(const Cycles &divisor) {
+		Cycles divide_cycles(const Cycles &divisor) {
 			HalfCycles half_divisor = HalfCycles(divisor);
 			Cycles result(length_ / half_divisor.length_);
 			length_ %= half_divisor.length_;
@@ -203,7 +203,6 @@ template <class T> class HalfClockReceiver: public T {
 	public:
 		using T::T;
 
-		using T::run_for;
 		inline void run_for(const HalfCycles half_cycles) {
 			half_cycles_ += half_cycles;
 			T::run_for(half_cycles_.flush_cycles());

ClockReceiver/ClockingHintSource.hpp

@@ -0,0 +1,88 @@
+//
+//  ClockingHintSource.h
+//  Clock Signal
+//
+//  Created by Thomas Harte on 20/08/2017.
+//  Copyright 2017 Thomas Harte. All rights reserved.
+//
+
+#ifndef ClockingHintSource_hpp
+#define ClockingHintSource_hpp
+
+namespace ClockingHint {
+
+enum class Preference {
+	/// The component doesn't currently require a clock signal.
+	None,
+	/// The component can be clocked only immediate prior to (explicit) accesses.
+	JustInTime,
+	/// The component require real-time clocking.
+	RealTime
+};
+
+class Source;
+
+struct Observer {
+	/// Called to inform an observer that the component @c component has changed its clocking requirements.
+	virtual void set_component_prefers_clocking(Source *component, Preference clocking) = 0;
+};
+
+/*!
+	An clocking hint source is any component that can provide hints as to the type of
+	clocking required for accurate emulation. A disk controller is an archetypal example.
+
+	Types of clocking are:
+
+		- none:
+			a component that acts and reacts to direct contact but does not have a state that autonomously evolves.
+			E.g. a ROM, RAM, or some kinds of disk controller when not in the process of performing a command.
+
+		- just-in-time:
+			a component that has an evolving state but can receive clock updates only immediately before a
+			direct contact. This is possibly the most common kind of component.
+
+		- real-time:
+			a component that needs to be clocked in 'real time' (i.e. in terms of the emulated machine). For example
+			so that it can announce an interrupt at the proper moment, because it is monitoring some aspect of
+			the machine rather than waiting to be called upon, or because there's some other non-obvious relationship
+			at play.
+
+	A clocking hint source can signal changes in preferred clocking to an observer.
+
+	This is intended to allow for performance improvements to machines with components that can be messaged selectively.
+	The observer callout is virtual so the intended use case is that a machine holds a component that might go through
+	periods of different clocking requirements.
+
+	Transitions should be sufficiently infrequent that a virtual call to announce them costs little enough that
+	the saved or deferred ::run_fors add up to a substantial amount.
+
+	The hint provided is just that: a hint. Owners may perform ::run_for at a greater frequency.
+*/
+class Source {
+	public:
+		/// Registers @c observer as the new clocking observer.
+		void set_clocking_hint_observer(Observer *observer) {
+			observer_ = observer;
+			update_clocking_observer();
+		}
+
+		/// @returns the current preferred clocking strategy.
+		virtual Preference preferred_clocking() = 0;
+
+	private:
+		Observer *observer_ = nullptr;
+
+	protected:
+		/*!
+			Provided for subclasses; call this whenever the clocking preference might have changed.
+			This will notify the observer if there is one.
+		*/
+		void update_clocking_observer() {
+			if(!observer_) return;
+			observer_->set_component_prefers_clocking(this, preferred_clocking());
+		}
+};
+
+}
+
+#endif /* ClockingHintSource_h */

ClockReceiver/ForceInline.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 01/08/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #ifndef ForceInline_hpp

ClockReceiver/Sleeper.hpp

@@ -1,60 +0,0 @@
-//
-//  Sleeper.h
-//  Clock Signal
-//
-//  Created by Thomas Harte on 20/08/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
-//
-
-#ifndef Sleeper_hpp
-#define Sleeper_hpp
-
-/*!
-	A sleeper is any component that sometimes requires a clock but at other times is 'asleep' — i.e. is not doing
-	any clock-derived work, so needn't receive a clock. A disk controller is an archetypal example.
-
-	A sleeper will signal sleeps and wakes to an observer.
-
-	This is intended to allow for performance improvements to machines with components that can sleep. The observer
-	callout is virtual so the intended use case is that a machine holds a component that might sleep. Its transitions
-	into and out of sleep are sufficiently infrequent that a virtual call to announce them costs sufficiently little that
-	the saved ::run_fors add up to a substantial amount.
-
-	By convention, sleeper components must be willing to accept ::run_for even after announcing sleep. It's a hint,
-	not a command.
-*/
-class Sleeper {
-	public:
-		Sleeper() : sleep_observer_(nullptr) {}
-
-		class SleepObserver {
-			public:
-				/// Called to inform an observer that the component @c component has either gone to sleep or become awake.
-				virtual void set_component_is_sleeping(void *component, bool is_sleeping) = 0;
-		};
-
-		/// Registers @c observer as the new sleep observer;
-		void set_sleep_observer(SleepObserver *observer) {
-			sleep_observer_ = observer;
-		}
-
-		/// @returns @c true if the component is currently sleeping; @c false otherwise.
-		virtual bool is_sleeping() = 0;
-
-	protected:
-		/// Provided for subclasses; send sleep announcements to the sleep_observer_.
-		SleepObserver *sleep_observer_;
-
-		/*!
-			Provided for subclasses; call this whenever is_sleeping might have changed, and the observer will be notified,
-			if one exists.
-
-			@c is_sleeping will be called only if there is an observer.
-		*/
-		void update_sleep_observer() {
-			if(!sleep_observer_) return;
-			sleep_observer_->set_component_is_sleeping(this, is_sleeping());
-		}
-};
-
-#endif /* Sleeper_h */

ClockReceiver/TimeTypes.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 21/03/2018.
-//  Copyright © 2018 Thomas Harte. All rights reserved.
+//  Copyright 2018 Thomas Harte. All rights reserved.
 //
 
 #ifndef TimeTypes_h

Components/1770/1770.cpp

@@ -3,11 +3,13 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 17/09/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "1770.hpp"
+
 #include "../../Storage/Disk/Encodings/MFM/Constants.hpp"
+#include "../../Outputs/Log.hpp"
 
 using namespace WD;
 
@@ -25,10 +27,10 @@ void WD1770::set_register(int address, uint8_t value) {
 			if((value&0xf0) == 0xd0) {
 				if(value == 0xd0) {
 					// Force interrupt **immediately**.
-					printf("Force interrupt immediately\n");
+					LOG("Force interrupt immediately");
 					posit_event(static_cast<int>(Event1770::ForceInterrupt));
 				} else {
-					printf("!!!TODO: force interrupt!!!\n");
+					ERROR("!!!TODO: force interrupt!!!");
 					update_status([] (Status &status) {
 						status.type = Status::One;
 					});
@@ -193,7 +195,7 @@ void WD1770::posit_event(int new_event_type) {
 	// Wait for a new command, branch to the appropriate handler.
 	case 0:
 	wait_for_command:
-		printf("Idle...\n");
+		LOG("Idle...");
 		set_data_mode(DataMode::Scanning);
 		index_hole_count_ = 0;
 
@@ -209,7 +211,7 @@ void WD1770::posit_event(int new_event_type) {
 			status.interrupt_request = false;
 		});
 
-		printf("Starting %02x\n", command_);
+		LOG("Starting " << std::hex << command_ << std::endl);
 
 		if(!(command_ & 0x80)) goto begin_type_1;
 		if(!(command_ & 0x40)) goto begin_type_2;
@@ -282,7 +284,7 @@ void WD1770::posit_event(int new_event_type) {
 			track_ = 0;
 			goto verify;
 		}
-		get_drive().step(step_direction_ ? 1 : -1);
+		get_drive().step(Storage::Disk::HeadPosition(step_direction_ ? 1 : -1));
 		unsigned int time_to_wait;
 		switch(command_ & 3) {
 			default:
@@ -327,7 +329,7 @@ void WD1770::posit_event(int new_event_type) {
 			}
 
 			if(header_[0] == track_) {
-				printf("Reached track %d\n", track_);
+				LOG("Reached track " << std::dec << track_);
 				update_status([] (Status &status) {
 					status.crc_error = false;
 				});
@@ -396,20 +398,20 @@ void WD1770::posit_event(int new_event_type) {
 		READ_ID();
 
 		if(index_hole_count_ == 5) {
-			printf("Failed to find sector %d\n", sector_);
+			LOG("Failed to find sector " << std::dec << sector_);
 			update_status([] (Status &status) {
 				status.record_not_found = true;
 			});
 			goto wait_for_command;
 		}
 		if(distance_into_section_ == 7) {
-			printf("Considering %d/%d\n", header_[0], header_[2]);
+			LOG("Considering " << std::dec << header_[0] << "/" << header_[2]);
 			set_data_mode(DataMode::Scanning);
 			if(		header_[0] == track_ && header_[2] == sector_ &&
 					(has_motor_on_line() || !(command_&0x02) || ((command_&0x08) >> 3) == header_[1])) {
-				printf("Found %d/%d\n", header_[0], header_[2]);
+				LOG("Found " << std::dec << header_[0] << "/" << header_[2]);
 				if(get_crc_generator().get_value()) {
-					printf("CRC error; back to searching\n");
+					LOG("CRC error; back to searching");
 					update_status([] (Status &status) {
 						status.crc_error = true;
 					});
@@ -465,7 +467,7 @@ void WD1770::posit_event(int new_event_type) {
 		distance_into_section_++;
 		if(distance_into_section_ == 2) {
 			if(get_crc_generator().get_value()) {
-				printf("CRC error; terminating\n");
+				LOG("CRC error; terminating");
 				update_status([this] (Status &status) {
 					status.crc_error = true;
 				});
@@ -476,7 +478,7 @@ void WD1770::posit_event(int new_event_type) {
 				sector_++;
 				goto test_type2_write_protection;
 			}
-			printf("Finished reading sector %d\n", sector_);
+			LOG("Finished reading sector " << std::dec << sector_);
 			goto wait_for_command;
 		}
 		goto type2_check_crc;
@@ -522,7 +524,7 @@ void WD1770::posit_event(int new_event_type) {
 	type2_write_loop:
 		/*
 			This deviates from the data sheet slightly since that would prima facie request one more byte
-			of data than is actually written — the last time around the loop it has transferred from the
+			of data than is actually written; the last time around the loop it has transferred from the
 			data register to the data shift register, set data request, written the byte, checked that data
 			request has been satified, then finally considers whether all bytes are done. Based on both
 			natural expectations and the way that emulated machines responded, I believe that to be a
@@ -558,7 +560,7 @@ void WD1770::posit_event(int new_event_type) {
 			sector_++;
 			goto test_type2_write_protection;
 		}
-		printf("Wrote sector %d\n", sector_);
+		LOG("Wrote sector " << std::dec << sector_);
 		goto wait_for_command;
 
 

Components/1770/1770.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 17/09/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef _770_hpp
@@ -43,7 +43,6 @@ class WD1770: public Storage::Disk::MFMController {
 
 		/// Runs the controller for @c number_of_cycles cycles.
 		void run_for(const Cycles cycles);
-		using Storage::Disk::Controller::run_for;
 
 		enum Flag: uint8_t {
 			NotReady		= 0x80,

Components/6522/6522.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 06/06/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef _522_hpp
@@ -113,6 +113,9 @@ template <class T> class MOS6522: public MOS6522Base {
 		/*! Gets a register value. */
 		uint8_t get_register(int address);
 
+		/*! @returns the bus handler. */
+		T &bus_handler();
+
 	private:
 		T &bus_handler_;
 

Components/6522/Implementation/6522Base.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 04/09/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #include "../6522.hpp"

Components/6522/Implementation/6522Implementation.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 04/09/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 template <typename T> void MOS6522<T>::set_register(int address, uint8_t value) {
@@ -145,6 +145,10 @@ template <typename T> uint8_t MOS6522<T>::get_port_input(Port port, uint8_t outp
 	return (input & ~output_mask) | (output & output_mask);
 }
 
+template <typename T> T &MOS6522<T>::bus_handler() {
+	return bus_handler_;
+}
+
 // Delegate and communications
 template <typename T> void MOS6522<T>::reevaluate_interrupts() {
 	bool new_interrupt_status = get_interrupt_line();

Components/6522/Implementation/6522Storage.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 04/09/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #ifndef _522Storage_hpp

Components/6522/Implementation/IRQDelegatePortHandler.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 04/09/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #include "../6522.hpp"

Components/6532/6532.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 19/06/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef _532_hpp

Components/6560/6560.cpp

@@ -3,14 +3,14 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 05/06/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "6560.hpp"
 
 #include <cstring>
 
-using namespace MOS;
+using namespace MOS::MOS6560;
 
 AudioGenerator::AudioGenerator(Concurrency::DeferringAsyncTaskQueue &audio_queue) :
 	audio_queue_(audio_queue) {}
@@ -106,7 +106,7 @@ static uint8_t noise_pattern[] = {
 // means every second cycle, etc.
 
 void AudioGenerator::get_samples(std::size_t number_of_samples, int16_t *target) {
-	for(unsigned int c = 0; c < number_of_samples; c++) {
+	for(unsigned int c = 0; c < number_of_samples; ++c) {
 		update(0, 2, shift);
 		update(1, 1, shift);
 		update(2, 0, shift);
@@ -124,7 +124,7 @@ void AudioGenerator::get_samples(std::size_t number_of_samples, int16_t *target)
 }
 
 void AudioGenerator::skip_samples(std::size_t number_of_samples) {
-	for(unsigned int c = 0; c < number_of_samples; c++) {
+	for(unsigned int c = 0; c < number_of_samples; ++c) {
 		update(0, 2, shift);
 		update(1, 1, shift);
 		update(2, 0, shift);

Components/6560/6560.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 05/06/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef _560_hpp
@@ -16,6 +16,7 @@
 #include "../../Outputs/Speaker/Implementation/SampleSource.hpp"
 
 namespace MOS {
+namespace MOS6560 {
 
 // audio state
 class AudioGenerator: public ::Outputs::Speaker::SampleSource {
@@ -40,6 +41,17 @@ class AudioGenerator: public ::Outputs::Speaker::SampleSource {
 		int16_t range_multiplier_ = 1;
 };
 
+struct BusHandler {
+	void perform_read(uint16_t address, uint8_t *pixel_data, uint8_t *colour_data) {
+		*pixel_data = 0xff;
+		*colour_data = 0xff;
+	}
+};
+
+enum class OutputMode {
+	PAL, NTSC
+};
+
 /*!
 	The 6560 Video Interface Chip ('VIC') is a video and audio output chip; it therefore vends both a @c CRT and a @c Speaker.
 
@@ -48,15 +60,16 @@ class AudioGenerator: public ::Outputs::Speaker::SampleSource {
 
 	@c set_register and @c get_register provide register access.
 */
-template <class T> class MOS6560 {
+template <class BusHandler> class MOS6560 {
 	public:
-		MOS6560() :
+		MOS6560(BusHandler &bus_handler) :
+				bus_handler_(bus_handler),
 				crt_(new Outputs::CRT::CRT(65*4, 4, Outputs::CRT::DisplayType::NTSC60, 2)),
 				audio_generator_(audio_queue_),
 				speaker_(audio_generator_)
 		{
 			crt_->set_svideo_sampling_function(
-				"vec2 svideo_sample(usampler2D texID, vec2 coordinate, vec2 iCoordinate, float phase)"
+				"vec2 svideo_sample(usampler2D texID, vec2 coordinate, vec2 iCoordinate, float phase, float amplitude)"
 				"{"
 					"vec2 yc = texture(texID, coordinate).rg / vec2(255.0);"
 
@@ -88,25 +101,21 @@ template <class T> class MOS6560 {
 			speaker_.set_high_frequency_cutoff(cutoff);
 		}
 
-		enum OutputMode {
-			PAL, NTSC
-		};
-
 		/*!
 			Sets the output mode to either PAL or NTSC.
 		*/
 		void set_output_mode(OutputMode output_mode) {
 			output_mode_ = output_mode;
 
-			// Luminances are encoded trivially: on a 0–255 scale.
+			// Luminances are encoded trivially: on a 0-255 scale.
 			const uint8_t luminances[16] = {
-				0,		255,	60,		189,
-				80,		144,	40,		227,
-				90,		161,	207,	227,
-				200,	196,	160,	196
+				0,		255,	64,		192,
+				128,	128,	64,		192,
+				128,	192,	128,	255,
+				192,	192,	128,	255
 			};
 
-			// Chrominances are encoded such that 0–128 is a complete revolution of phase;
+			// Chrominances are encoded such that 0-128 is a complete revolution of phase;
 			// anything above 191 disables the colour subcarrier. Phase is relative to the
 			// colour burst, so 0 is green.
 			const uint8_t pal_chrominances[16] = {
@@ -116,10 +125,10 @@ template <class T> class MOS6560 {
 				19,		86,		123,	59,
 			};
 			const uint8_t ntsc_chrominances[16] = {
-				255,	255,	7,		71,
-				25,		86,		48,		112,
-				0,		119,	7,		71,
-				25,		86,		48,		112,
+				255,	255,	121,	57,
+				103,	42,		80,		16,
+				0,		9,		121,	57,
+				103,	42,		80,		16,
 			};
 			const uint8_t *chrominances;
 			Outputs::CRT::DisplayType display_type;
@@ -129,7 +138,8 @@ template <class T> class MOS6560 {
 					chrominances = pal_chrominances;
 					display_type = Outputs::CRT::DisplayType::PAL50;
 					timing_.cycles_per_line = 71;
-					timing_.line_counter_increment_offset = 0;
+					timing_.line_counter_increment_offset = 4;
+					timing_.final_line_increment_position = timing_.cycles_per_line - timing_.line_counter_increment_offset;
 					timing_.lines_per_progressive_field = 312;
 					timing_.supports_interlacing = false;
 				break;
@@ -138,7 +148,8 @@ template <class T> class MOS6560 {
 					chrominances = ntsc_chrominances;
 					display_type = Outputs::CRT::DisplayType::NTSC60;
 					timing_.cycles_per_line = 65;
-					timing_.line_counter_increment_offset = 65 - 33;	// TODO: this is a bit of a hack; separate vertical and horizontal counting
+					timing_.line_counter_increment_offset = 40;
+					timing_.final_line_increment_position = 58;
 					timing_.lines_per_progressive_field = 261;
 					timing_.supports_interlacing = true;
 				break;
@@ -148,7 +159,7 @@ template <class T> class MOS6560 {
 
 			switch(output_mode) {
 				case OutputMode::PAL:
-					crt_->set_visible_area(Outputs::CRT::Rect(0.1f, 0.05f, 0.9f, 0.9f));
+					crt_->set_visible_area(Outputs::CRT::Rect(0.1f, 0.07f, 0.9f, 0.9f));
 				break;
 				case OutputMode::NTSC:
 					crt_->set_visible_area(Outputs::CRT::Rect(0.05f, 0.05f, 0.9f, 0.9f));
@@ -176,7 +187,6 @@ template <class T> class MOS6560 {
 
 				// keep track of internal time relative to this scanline
 				horizontal_counter_++;
-				full_frame_counter_++;
 				if(horizontal_counter_ == timing_.cycles_per_line) {
 					if(horizontal_drawing_latch_) {
 						current_character_row_++;
@@ -198,9 +208,8 @@ template <class T> class MOS6560 {
 					horizontal_drawing_latch_ = false;
 
 					vertical_counter_ ++;
-					if(vertical_counter_ == (registers_.interlaced ? (is_odd_frame_ ? 262 : 263) : timing_.lines_per_progressive_field)) {
+					if(vertical_counter_ == lines_this_field()) {
 						vertical_counter_ = 0;
-						full_frame_counter_ = 0;
 
 						if(output_mode_ == OutputMode::NTSC) is_odd_frame_ ^= true;
 						current_row_ = 0;
@@ -248,7 +257,7 @@ template <class T> class MOS6560 {
 
 				uint8_t pixel_data;
 				uint8_t colour_data;
-				static_cast<T *>(this)->perform_read(fetch_address, &pixel_data, &colour_data);
+				bus_handler_.perform_read(fetch_address, &pixel_data, &colour_data);
 
 				// TODO: there should be a further two-cycle delay on pixels being output; the reverse bit should
 				// divide the byte it is set for 3:1 and then continue as usual.
@@ -262,7 +271,7 @@ template <class T> class MOS6560 {
 
 				// apply vertical sync
 				if(
-					(vertical_counter_ < 3 && (is_odd_frame_ || !registers_.interlaced)) ||
+					(vertical_counter_ < 3 && is_odd_frame()) ||
 					(registers_.interlaced &&
 						(
 							(vertical_counter_ == 0 && horizontal_counter_ > 32) ||
@@ -278,7 +287,7 @@ template <class T> class MOS6560 {
 						case State::Sync:			crt_->output_sync(cycles_in_state_ * 4);														break;
 						case State::ColourBurst:	crt_->output_colour_burst(cycles_in_state_ * 4, (is_odd_frame_ || is_odd_line_) ? 128 : 0);		break;
 						case State::Border:			output_border(cycles_in_state_ * 4);															break;
-						case State::Pixels:			crt_->output_data(cycles_in_state_ * 4, 1);														break;
+						case State::Pixels:			crt_->output_data(cycles_in_state_ * 4);														break;
 					}
 					output_state_ = this_state_;
 					cycles_in_state_ = 0;
@@ -291,6 +300,9 @@ template <class T> class MOS6560 {
 				cycles_in_state_++;
 
 				if(this_state_ == State::Pixels) {
+					// TODO: palette changes can happen within half-characters; the below needs to be divided.
+					// Also: a perfect opportunity to rearrange this inner loop for no longer needing to be
+					// two parts with a cooperative owner?
 					if(column_counter_&1) {
 						character_value_ = pixel_data;
 
@@ -331,7 +343,10 @@ template <class T> class MOS6560 {
 						character_code_ = pixel_data;
 						character_colour_ = colour_data;
 					}
+				}
 
+				// Keep counting columns even if sync or the colour burst have interceded.
+				if(column_counter_ >= 0 && column_counter_ < columns_this_line_*2) {
 					column_counter_++;
 				}
 			}
@@ -414,15 +429,15 @@ template <class T> class MOS6560 {
 		*/
 		uint8_t get_register(int address) {
 			address &= 0xf;
-			int current_line = (full_frame_counter_ + timing_.line_counter_increment_offset) / timing_.cycles_per_line;
 			switch(address) {
 				default: return registers_.direct_values[address];
-				case 0x03: return static_cast<uint8_t>(current_line << 7) | (registers_.direct_values[3] & 0x7f);
-				case 0x04: return (current_line >> 1) & 0xff;
+				case 0x03: return static_cast<uint8_t>(raster_value() << 7) | (registers_.direct_values[3] & 0x7f);
+				case 0x04: return (raster_value() >> 1) & 0xff;
 			}
 		}
 
 	private:
+		BusHandler &bus_handler_;
 		std::unique_ptr<Outputs::CRT::CRT> crt_;
 
 		Concurrency::DeferringAsyncTaskQueue audio_queue_;
@@ -453,7 +468,29 @@ template <class T> class MOS6560 {
 		unsigned int cycles_in_state_;
 
 		// counters that cover an entire field
-		int horizontal_counter_ = 0, vertical_counter_ = 0, full_frame_counter_;
+		int horizontal_counter_ = 0, vertical_counter_ = 0;
+		const int lines_this_field() {
+			// Necessary knowledge here: only the NTSC 6560 supports interlaced video.
+			return registers_.interlaced ? (is_odd_frame_ ? 262 : 263) : timing_.lines_per_progressive_field;
+		}
+		const int raster_value() {
+			const int bonus_line = (horizontal_counter_ + timing_.line_counter_increment_offset) / timing_.cycles_per_line;
+			const int line = vertical_counter_ + bonus_line;
+			const int final_line = lines_this_field();
+
+			if(line < final_line)
+				return line;
+
+			if(is_odd_frame()) {
+				return (horizontal_counter_ >= timing_.final_line_increment_position) ? 0 : final_line - 1;
+			} else {
+				return line % final_line;
+			}
+			// Cf. http://www.sleepingelephant.com/ipw-web/bulletin/bb/viewtopic.php?f=14&t=7237&start=15#p80737
+		}
+		bool is_odd_frame() {
+			return is_odd_frame_ || !registers_.interlaced;
+		}
 
 		// latches dictating start and length of drawing
 		bool vertical_drawing_latch_, horizontal_drawing_latch_;
@@ -483,12 +520,14 @@ template <class T> class MOS6560 {
 		struct {
 			int cycles_per_line;
 			int line_counter_increment_offset;
+			int final_line_increment_position;
 			int lines_per_progressive_field;
 			bool supports_interlacing;
 		} timing_;
 		OutputMode output_mode_;
 };
 
+}
 }
 
 #endif /* _560_hpp */

Components/6845/CRTC6845.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 31/07/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #ifndef CRTC6845_hpp
@@ -35,7 +35,7 @@ class BusHandler {
 		void perform_bus_cycle_phase1(const BusState &) {}
 
 		/*!
-			Performs the second phase of a 6845 bus cycle. Some bus state — including sync — is updated
+			Performs the second phase of a 6845 bus cycle. Some bus state, including sync, is updated
 			directly after phase 1 and hence is visible to an observer during phase 2. Handlers may therefore
 			implement @c perform_bus_cycle_phase2 to be notified of the availability of that state without
 			having to wait until the next cycle has begun.

Components/8255/i8255.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 01/08/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #ifndef i8255_hpp

Components/8272/i8272.cpp

@@ -3,13 +3,12 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 05/08/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #include "i8272.hpp"
-//#include "../../Storage/Disk/Encodings/MFM/Encoder.hpp"
 
-#include <cstdio>
+#include "../../Outputs/Log.hpp"
 
 using namespace Intel::i8272;
 
@@ -83,8 +82,10 @@ i8272::i8272(BusHandler &bus_handler, Cycles clock_rate) :
 	posit_event(static_cast<int>(Event8272::CommandByte));
 }
 
-bool i8272::is_sleeping() {
-	return is_sleeping_ && Storage::Disk::MFMController::is_sleeping();
+ClockingHint::Preference i8272::preferred_clocking() {
+	const auto mfm_controller_preferred_clocking = Storage::Disk::MFMController::preferred_clocking();
+	if(mfm_controller_preferred_clocking != ClockingHint::Preference::None) return mfm_controller_preferred_clocking;
+	return is_sleeping_ ? ClockingHint::Preference::None : ClockingHint::Preference::JustInTime;
 }
 
 void i8272::run_for(Cycles cycles) {
@@ -113,9 +114,9 @@ void i8272::run_for(Cycles cycles) {
 				while(steps--) {
 					// Perform a step.
 					int direction = (drives_[c].target_head_position < drives_[c].head_position) ? -1 : 1;
-					printf("Target %d versus believed %d\n", drives_[c].target_head_position, drives_[c].head_position);
+					LOG("Target " << PADDEC(0) << drives_[c].target_head_position << " versus believed " << static_cast<int>(drives_[c].head_position));
 					select_drive(c);
-					get_drive().step(direction);
+					get_drive().step(Storage::Disk::HeadPosition(direction));
 					if(drives_[c].target_head_position >= 0) drives_[c].head_position += direction;
 
 					// Check for completion.
@@ -159,7 +160,7 @@ void i8272::run_for(Cycles cycles) {
 	}
 
 	is_sleeping_ = !delay_time_ && !drives_seeking_ && !head_timers_running_;
-	if(is_sleeping_) update_sleep_observer();
+	if(is_sleeping_) update_clocking_observer();
 }
 
 void i8272::set_register(int address, uint8_t value) {
@@ -198,7 +199,7 @@ uint8_t i8272::get_register(int address) {
 
 #define MS_TO_CYCLES(x)			x * 8000
 #define WAIT_FOR_EVENT(mask)	resume_point_ = __LINE__; interesting_event_mask_ = static_cast<int>(mask); return; case __LINE__:
-#define WAIT_FOR_TIME(ms)		resume_point_ = __LINE__; interesting_event_mask_ = static_cast<int>(Event8272::Timer); delay_time_ = MS_TO_CYCLES(ms); is_sleeping_ = false; update_sleep_observer(); case __LINE__: if(delay_time_) return;
+#define WAIT_FOR_TIME(ms)		resume_point_ = __LINE__; interesting_event_mask_ = static_cast<int>(Event8272::Timer); delay_time_ = MS_TO_CYCLES(ms); is_sleeping_ = false; update_clocking_observer(); case __LINE__: if(delay_time_) return;
 
 #define PASTE(x, y) x##y
 #define CONCAT(x, y) PASTE(x, y)
@@ -257,7 +258,7 @@ uint8_t i8272::get_register(int address) {
 		if(drives_[active_drive_].head_unload_delay[active_head_] == 0) {	\
 			head_timers_running_++;	\
 			is_sleeping_ = false;	\
-			update_sleep_observer();	\
+			update_clocking_observer();	\
 		}	\
 		drives_[active_drive_].head_unload_delay[active_head_] = MS_TO_CYCLES(head_unload_time_);\
 	}
@@ -384,17 +385,17 @@ void i8272::posit_event(int event_type) {
 		// the index hole limit is breached or a sector is found with a cylinder, head, sector and size equal to the
 		// values in the internal registers.
 			index_hole_limit_ = 2;
-//			printf("Seeking %02x %02x %02x %02x\n", cylinder_, head_, sector_, size_);
+//			LOG("Seeking " << PADDEC(0) << cylinder_ << " " << head_ " " << sector_ << " " << size_);
 		find_next_sector:
 			FIND_HEADER();
 			if(!index_hole_limit_) {
 				// Two index holes have passed wihout finding the header sought.
-//				printf("Not found\n");
+//				LOG("Not found");
 				SetNoData();
 				goto abort;
 			}
 			index_hole_count_ = 0;
-//			printf("Header\n");
+//			LOG("Header");
 			READ_HEADER();
 			if(index_hole_count_) {
 				// This implies an index hole was sighted within the header. Error out.
@@ -405,11 +406,11 @@ void i8272::posit_event(int event_type) {
 				// This implies a CRC error in the header; mark as such but continue.
 				SetDataError();
 			}
-//			printf("Considering %02x %02x %02x %02x [%04x]\n", header_[0], header_[1], header_[2], header_[3], get_crc_generator().get_value());
+//			LOG("Considering << PADHEX(2) << header_[0] << " " << header_[1] << " " << header_[2] << " " << header_[3] << " [" << get_crc_generator().get_value() << "]");
 			if(header_[0] != cylinder_ || header_[1] != head_ || header_[2] != sector_ || header_[3] != size_) goto find_next_sector;
 
 			// Branch to whatever is supposed to happen next
-//			printf("Proceeding\n");
+//			LOG("Proceeding");
 			switch(command_[0] & 0x1f) {
 				case CommandReadData:
 				case CommandReadDeletedData:
@@ -423,7 +424,13 @@ void i8272::posit_event(int event_type) {
 
 	// Performs the read data or read deleted data command.
 	read_data:
-			printf("Read [deleted] data [%02x %02x %02x %02x ... %02x %02x]\n", command_[2], command_[3], command_[4], command_[5], command_[6], command_[8]);
+			LOG(PADHEX(2) << "Read [deleted] data ["
+				<< static_cast<int>(command_[2]) << " "
+				<< static_cast<int>(command_[3]) << " "
+				<< static_cast<int>(command_[4]) << " "
+				<< static_cast<int>(command_[5]) << " ... "
+				<< static_cast<int>(command_[6]) << " "
+				<< static_cast<int>(command_[8]) << "]");
 		read_next_data:
 			goto read_write_find_header;
 
@@ -434,7 +441,7 @@ void i8272::posit_event(int event_type) {
 			ClearControlMark();
 			if(event_type == static_cast<int>(Event::Token)) {
 				if(get_latest_token().type != Token::Data && get_latest_token().type != Token::DeletedData) {
-					// Something other than a data mark came next — impliedly an ID or index mark.
+					// Something other than a data mark came next, impliedly an ID or index mark.
 					SetMissingAddressMark();
 					SetMissingDataAddressMark();
 					goto abort;	// TODO: or read_next_data?
@@ -507,7 +514,13 @@ void i8272::posit_event(int event_type) {
 			goto post_st012chrn;
 
 	write_data:
-			printf("Write [deleted] data [%02x %02x %02x %02x ... %02x %02x]\n", command_[2], command_[3], command_[4], command_[5], command_[6], command_[8]);
+			LOG(PADHEX(2) << "Write [deleted] data ["
+				<< static_cast<int>(command_[2]) << " "
+				<< static_cast<int>(command_[3]) << " "
+				<< static_cast<int>(command_[4]) << " "
+				<< static_cast<int>(command_[5]) << " ... "
+				<< static_cast<int>(command_[6]) << " "
+				<< static_cast<int>(command_[8]) << "]");
 
 			if(get_drive().get_is_read_only()) {
 				SetNotWriteable();
@@ -542,7 +555,7 @@ void i8272::posit_event(int event_type) {
 				goto write_loop;
 			}
 
-			printf("Wrote %d bytes\n", distance_into_section_);
+			LOG("Wrote " << PADDEC(0) << distance_into_section_ << " bytes");
 			write_crc();
 			expects_input_ = false;
 			WAIT_FOR_EVENT(Event::DataWritten);
@@ -558,7 +571,7 @@ void i8272::posit_event(int event_type) {
 	// Performs the read ID command.
 	read_id:
 		// Establishes the drive and head being addressed, and whether in double density mode.
-			printf("Read ID [%02x %02x]\n", command_[0], command_[1]);
+			LOG(PADHEX(2) << "Read ID [" << static_cast<int>(command_[0]) << " " << static_cast<int>(command_[1]) << "]");
 
 		// Sets a maximum index hole limit of 2 then waits either until it finds a header mark or sees too many index holes.
 		// If a header mark is found, reads in the following bytes that produce a header. Otherwise branches to data not found.
@@ -580,7 +593,11 @@ void i8272::posit_event(int event_type) {
 
 	// Performs read track.
 	read_track:
-			printf("Read track [%02x %02x %02x %02x]\n", command_[2], command_[3], command_[4], command_[5]);
+			LOG(PADHEX(2) << "Read track ["
+				<< static_cast<int>(command_[2]) << " "
+				<< static_cast<int>(command_[3]) << " "
+				<< static_cast<int>(command_[4]) << " "
+				<< static_cast<int>(command_[5]) << "]");
 
 			// Wait for the index hole.
 			WAIT_FOR_EVENT(Event::IndexHole);
@@ -621,7 +638,7 @@ void i8272::posit_event(int event_type) {
 
 	// Performs format [/write] track.
 	format_track:
-			printf("Format track\n");
+			LOG("Format track");
 			if(get_drive().get_is_read_only()) {
 				SetNotWriteable();
 				goto abort;
@@ -665,7 +682,12 @@ void i8272::posit_event(int event_type) {
 				break;
 			}
 
-			printf("W: %02x %02x %02x %02x, %04x\n", header_[0], header_[1], header_[2], header_[3], get_crc_generator().get_value());
+			LOG(PADHEX(2) << "W:"
+				<< static_cast<int>(header_[0]) << " "
+				<< static_cast<int>(header_[1]) << " "
+				<< static_cast<int>(header_[2]) << " "
+				<< static_cast<int>(header_[3]) << ", "
+				<< get_crc_generator().get_value());
 			write_crc();
 
 			// Write the sector body.
@@ -697,15 +719,15 @@ void i8272::posit_event(int event_type) {
 		goto post_st012chrn;
 
 	scan_low:
-		printf("Scan low unimplemented!!\n");
+		ERROR("Scan low unimplemented!!");
 		goto wait_for_command;
 
 	scan_low_or_equal:
-		printf("Scan low or equal unimplemented!!\n");
+		ERROR("Scan low or equal unimplemented!!");
 		goto wait_for_command;
 
 	scan_high_or_equal:
-		printf("Scan high or equal unimplemented!!\n");
+		ERROR("Scan high or equal unimplemented!!");
 		goto wait_for_command;
 
 	// Performs both recalibrate and seek commands. These commands occur asynchronously, so the actual work
@@ -720,7 +742,7 @@ void i8272::posit_event(int event_type) {
 				if(drives_[drive].phase != Drive::Seeking) {
 					drives_seeking_++;
 					is_sleeping_ = false;
-					update_sleep_observer();
+					update_clocking_observer();
 				}
 
 				// Set currently seeking, with a step to occur right now (yes, it sounds like jamming these
@@ -736,11 +758,11 @@ void i8272::posit_event(int event_type) {
 				// up in run_for understands to mean 'keep going until track 0 is active').
 				if(command_.size() > 2) {
 					drives_[drive].target_head_position = command_[2];
-					printf("Seek to %02x\n", command_[2]);
+					LOG(PADHEX(2) << "Seek to " << static_cast<int>(command_[2]));
 				} else {
 					drives_[drive].target_head_position = -1;
 					drives_[drive].head_position = 0;
-					printf("Recalibrate\n");
+					LOG("Recalibrate");
 				}
 
 				// Check whether any steps are even needed; if not then mark as completed already.
@@ -753,7 +775,7 @@ void i8272::posit_event(int event_type) {
 
 	// Performs sense interrupt status.
 	sense_interrupt_status:
-			printf("Sense interrupt status\n");
+			LOG("Sense interrupt status");
 			{
 				// Find the first drive that is in the CompletedSeeking state.
 				int found_drive = -1;
@@ -781,7 +803,7 @@ void i8272::posit_event(int event_type) {
 	// Performs specify.
 	specify:
 		// Just store the values, and terminate the command.
-			printf("Specify\n");
+			LOG("Specify");
 			step_rate_time_ = 16 - (command_[1] >> 4);			// i.e. 1 to 16ms
 			head_unload_time_ = (command_[1] & 0x0f) << 4;		// i.e. 16 to 240ms
 			head_load_time_ = command_[2] & ~1;					// i.e. 2 to 254 ms in increments of 2ms
@@ -792,7 +814,7 @@ void i8272::posit_event(int event_type) {
 			goto wait_for_command;
 
 	sense_drive_status:
-			printf("Sense drive status\n");
+			LOG("Sense drive status");
 			{
 				int drive = command_[1] & 3;
 				select_drive(drive);
@@ -828,14 +850,14 @@ void i8272::posit_event(int event_type) {
 
 			goto post_result;
 
-	// Posts whatever is in result_stack_ as a result phase. Be aware that it is a stack — the
+	// Posts whatever is in result_stack_ as a result phase. Be aware that it is a stack, so the
 	// last thing in it will be returned first.
 	post_result:
-			printf("Result to %02x, main %02x: ", command_[0] & 0x1f, main_status_);
+			LOGNBR(PADHEX(2) << "Result to " << static_cast<int>(command_[0] & 0x1f) << ", main " << static_cast<int>(main_status_) << "; ");
 			for(std::size_t c = 0; c < result_stack_.size(); c++) {
-				printf("%02x ", result_stack_[result_stack_.size() - 1 - c]);
+				LOGNBR(" " << static_cast<int>(result_stack_[result_stack_.size() - 1 - c]));
 			}
-			printf("\n");
+			LOGNBR(std::endl);
 
 			// Set ready to send data to the processor, no longer in non-DMA execution phase.
 			is_executing_ = false;

Components/8272/i8272.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 05/08/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #ifndef i8272_hpp
@@ -39,7 +39,7 @@ class i8272: public Storage::Disk::MFMController {
 		void set_dma_acknowledge(bool dack);
 		void set_terminal_count(bool tc);
 
-		bool is_sleeping();
+		ClockingHint::Preference preferred_clocking() override;
 
 	protected:
 		virtual void select_drive(int number) = 0;
@@ -67,7 +67,7 @@ class i8272: public Storage::Disk::MFMController {
 			ResultEmpty = (1 << 5),
 			NoLongerReady = (1 << 6)
 		};
-		void posit_event(int type);
+		void posit_event(int type) override;
 		int interesting_event_mask_ = static_cast<int>(Event8272::CommandByte);
 		int resume_point_ = 0;
 		bool is_access_command_ = false;

Components/9918/9918.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 25/11/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #include "9918.hpp"
@@ -536,7 +536,8 @@ void TMS9918::run_for(const HalfCycles cycles) {
 					}
 
 					if(output_column_ == first_right_border_column_) {
-						crt_->output_data(static_cast<unsigned int>(first_right_border_column_ - first_pixel_column_) * 4, 4);
+						const unsigned int data_length = static_cast<unsigned int>(first_right_border_column_ - first_pixel_column_);
+						crt_->output_data(data_length * 4, data_length);
 						pixel_target_ = nullptr;
 					}
 				}

Components/9918/9918.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 25/11/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #ifndef TMS9918_hpp
@@ -56,7 +56,7 @@ class TMS9918: public TMS9918Base {
 
 		/*!
 			Runs the VCP for the number of cycles indicate; it is an implicit assumption of the code
-			that the input clock rate is 3579545 Hz — the NTSC colour clock rate.
+			that the input clock rate is 3579545 Hz, the NTSC colour clock rate.
 		*/
 		void run_for(const HalfCycles cycles);
 

Components/9918/Implementation/9918Base.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 14/12/2017.
-//  Copyright © 2017 Thomas Harte. All rights reserved.
+//  Copyright 2017 Thomas Harte. All rights reserved.
 //
 
 #ifndef TMS9918Base_hpp

Components/AY38910/AY38910.cpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 14/10/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #include "AY38910.hpp"
@@ -103,7 +103,7 @@ void AY38910::get_samples(std::size_t number_of_samples, int16_t *target) {
 			noise_shift_register_ >>= 1;
 		}
 
-		// ... and the envelope generator. Table based for pattern lookup, with a 'refill' step — a way of
+		// ... and the envelope generator. Table based for pattern lookup, with a 'refill' step: a way of
 		// implementing non-repeating patterns by locking them to table position 0x1f.
 		if(envelope_divider_) envelope_divider_--;
 		else {
@@ -130,7 +130,7 @@ void AY38910::evaluate_output_volume() {
 	// The output level for a channel is:
 	//	1 if neither tone nor noise is enabled;
 	//	0 if either tone or noise is enabled and its value is low.
-	// The tone/noise enable bits use inverse logic — 0 = on, 1 = off — permitting the OR logic below.
+	// The tone/noise enable bits use inverse logic; 0 = on, 1 = off; permitting the OR logic below.
 #define tone_level(c, tone_bit)		(tone_outputs_[c] | (output_registers_[7] >> tone_bit))
 #define noise_level(c, noise_bit)	(noise_output_ | (output_registers_[7] >> noise_bit))
 
@@ -225,14 +225,10 @@ uint8_t AY38910::get_register_value() {
 	};
 
 	if(selected_register_ > 15) return 0xff;
-	switch(selected_register_) {
-		default:	return registers_[selected_register_] & register_masks[selected_register_];
-		case 14:	return (registers_[0x7] & 0x40) ? registers_[14] : port_inputs_[0];
-		case 15:	return (registers_[0x7] & 0x80) ? registers_[15] : port_inputs_[1];
-	}
+	return registers_[selected_register_] & register_masks[selected_register_];
 }
 
-// MARK: - Port handling
+// MARK: - Port querying
 
 uint8_t AY38910::get_port_output(bool port_b) {
 	return registers_[port_b ? 15 : 14];
@@ -250,11 +246,16 @@ void AY38910::set_data_input(uint8_t r) {
 }
 
 uint8_t AY38910::get_data_output() {
-	if(control_state_ == Read && selected_register_ >= 14) {
-		if(port_handler_) {
-			return port_handler_->get_port_input(selected_register_ == 15);
-		} else {
-			return 0xff;
+	if(control_state_ == Read && selected_register_ >= 14 && selected_register_ < 16) {
+		// Per http://cpctech.cpc-live.com/docs/psgnotes.htm if a port is defined as output then the
+		// value returned to the CPU when reading it is the and of the output value and any input.
+		// If it's defined as input then you just get the input.
+		const uint8_t mask = port_handler_ ? port_handler_->get_port_input(selected_register_ == 15) : 0xff;
+
+		switch(selected_register_) {
+			default: 	break;
+			case 14:	return mask & ((registers_[0x7] & 0x40) ? registers_[14] : 0xff);
+			case 15:	return mask & ((registers_[0x7] & 0x80) ? registers_[15] : 0xff);
 		}
 	}
 	return data_output_;
@@ -276,8 +277,10 @@ void AY38910::set_control_lines(ControlLines control_lines) {
 }
 
 void AY38910::update_bus() {
+	// Assume no output, unless this turns out to be a read.
+	data_output_ = 0xff;
 	switch(control_state_) {
-		default: break;
+		default: 			break;
 		case LatchAddress:	select_register(data_input_);			break;
 		case Write:			set_register_value(data_input_);		break;
 		case Read:			data_output_ = get_register_value();	break;

Components/AY38910/AY38910.hpp

@@ -3,7 +3,7 @@
 //  Clock Signal
 //
 //  Created by Thomas Harte on 14/10/2016.
-//  Copyright © 2016 Thomas Harte. All rights reserved.
+//  Copyright 2016 Thomas Harte. All rights reserved.
 //
 
 #ifndef AY_3_8910_hpp
@@ -92,9 +92,8 @@ class AY38910: public ::Outputs::Speaker::SampleSource {
 		Concurrency::DeferringAsyncTaskQueue &task_queue_;
 
 		int selected_register_ = 0;
-		uint8_t registers_[16];
+		uint8_t registers_[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 		uint8_t output_registers_[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-		uint8_t port_inputs_[2];
 
 		int master_divider_ = 0;
 

Components/AudioToggle/AudioToggle.cpp

@@ -0,0 +1,38 @@
+//
+//  AudioToggle.cpp
+//  Clock Signal
+//
+//  Created by Thomas Harte on 17/04/2018.
+//  Copyright 2018 Thomas Harte. All rights reserved.
+//
+
+#include "AudioToggle.hpp"
+
+using namespace Audio;
+
+Audio::Toggle::Toggle(Concurrency::DeferringAsyncTaskQueue &audio_queue) :
+	audio_queue_(audio_queue) {}
+
+void Toggle::get_samples(std::size_t number_of_samples, std::int16_t *target) {
+	for(std::size_t sample = 0; sample < number_of_samples; ++sample) {
+		target[sample] = level_;
+	}
+}
+
+void Toggle::set_sample_volume_range(std::int16_t range) {
+	volume_ = range;
+}
+
+void Toggle::skip_samples(const std::size_t number_of_samples) {}
+
+void Toggle::set_output(bool enabled) {
+	if(is_enabled_ == enabled) return;
+	is_enabled_ = enabled;
+	audio_queue_.defer([=] {
+		level_ = enabled ? volume_ : 0;
+	});
+}
+
+bool Toggle::get_output() {
+	return is_enabled_;
+}