Roll in some random style improvements.

Further reduce indentation.

Machines/ColecoVision/ColecoVision.hpp

@@ -23,10 +23,10 @@ struct Machine {
 
 	class Options: public Reflection::StructImpl<Options>, public Configurable::DisplayOption<Options> {
 		friend Configurable::DisplayOption<Options>;
-		public:
+	public:
-			Options(Configurable::OptionsType type) :
+		Options(Configurable::OptionsType type) :
-				Configurable::DisplayOption<Options>(type == Configurable::OptionsType::UserFriendly ?
+			Configurable::DisplayOption<Options>(type == Configurable::OptionsType::UserFriendly ?
-					Configurable::Display::SVideo : Configurable::Display::CompositeColour) {}
+				Configurable::Display::SVideo : Configurable::Display::CompositeColour) {}
 
 	private:
 		Options() : Options(Configurable::OptionsType::UserFriendly) {}

Machines/Commodore/Plus4/Plus4.cpp

@@ -44,37 +44,37 @@ namespace {
 Log::Logger<Log::Source::Plus4> logger;
 
 class Joystick: public Inputs::ConcreteJoystick {
-	public:
+public:
-		Joystick() :
+	Joystick() :
-			ConcreteJoystick({
+		ConcreteJoystick({
-				Input(Input::Up),
+			Input(Input::Up),
-				Input(Input::Down),
+			Input(Input::Down),
-				Input(Input::Left),
+			Input(Input::Left),
-				Input(Input::Right),
+			Input(Input::Right),
-				Input(Input::Fire)
+			Input(Input::Fire)
-			}) {}
+		}) {}
 
-		void did_set_input(const Input &digital_input, bool is_active) final {
+	void did_set_input(const Input &digital_input, bool is_active) final {
-			const auto apply = [&](uint8_t mask) {
+		const auto apply = [&](uint8_t mask) {
-				if(is_active) mask_ &= ~mask; else mask_ |= mask;
+			if(is_active) mask_ &= ~mask; else mask_ |= mask;
-			};
+		};
 
-			switch(digital_input.type) {
+		switch(digital_input.type) {
-				default: return;
+			default: return;
-				case Input::Right:	apply(0x08);	break;
+			case Input::Right:	apply(0x08);	break;
-				case Input::Left:	apply(0x04);	break;
+			case Input::Left:	apply(0x04);	break;
-				case Input::Down:	apply(0x02);	break;
+			case Input::Down:	apply(0x02);	break;
-				case Input::Up:		apply(0x01);	break;
+			case Input::Up:		apply(0x01);	break;
-				case Input::Fire:	apply(0xc0);	break;
+			case Input::Fire:	apply(0xc0);	break;
-			}
 		}
+	}
 
-		uint8_t mask() const {
+	uint8_t mask() const {
-			return mask_;
+		return mask_;
-		}
+	}
 
-	private:
+private:
-		uint8_t mask_ = 0xff;
+	uint8_t mask_ = 0xff;
 };
 
 class Timers {

Machines/MSX/Cartridges/ASCII16kb.hpp

@@ -13,35 +13,35 @@
 namespace MSX::Cartridge {
 
 class ASCII16kbROMSlotHandler: public MemorySlotHandler {
-	public:
+public:
-		ASCII16kbROMSlotHandler(MSX::MemorySlot &slot) : slot_(slot) {}
+	ASCII16kbROMSlotHandler(MSX::MemorySlot &slot) : slot_(slot) {}
 
-		void write(uint16_t address, uint8_t value, bool pc_is_outside_bios) final {
+	void write(const uint16_t address, const uint8_t value, const bool pc_is_outside_bios) final {
-			switch(address >> 11) {
+		switch(address >> 11) {
-				default:
+			default:
-					if(pc_is_outside_bios) confidence_counter_.add_miss();
+				if(pc_is_outside_bios) confidence_counter_.add_miss();
-				break;
+			break;
-				case 0xc:
+			case 0xc:
-					if(pc_is_outside_bios) {
+				if(pc_is_outside_bios) {
-						if(address == 0x6000) confidence_counter_.add_hit(); else confidence_counter_.add_equivocal();
+					hit_or_equivocal(address == 0x6000);
-					}
+				}
-					slot_.map(value * 0x4000, 0x4000, 0x4000);
+				slot_.map(value * 0x4000, 0x4000, 0x4000);
-				break;
+			break;
-				case 0xe:
+			case 0xe:
-					if(pc_is_outside_bios) {
+				if(pc_is_outside_bios) {
-						if(address == 0x7000 || address == 0x77ff) confidence_counter_.add_hit(); else confidence_counter_.add_equivocal();
+					hit_or_equivocal(address == 0x7000 || address == 0x77ff);
-					}
+				}
-					slot_.map(value * 0x4000, 0x8000, 0x4000);
+				slot_.map(value * 0x4000, 0x8000, 0x4000);
-				break;
+			break;
-			}
 		}
+	}
 
-		virtual std::string debug_type() final {
+	virtual std::string debug_type() final {
-			return "A16";
+		return "A16";
-		}
+	}
 
-	private:
+private:
-		MSX::MemorySlot &slot_;
+	MSX::MemorySlot &slot_;
 };
 
 }

Machines/MSX/Cartridges/ASCII8kb.hpp

@@ -13,47 +13,47 @@
 namespace MSX::Cartridge {
 
 class ASCII8kbROMSlotHandler: public MemorySlotHandler {
-	public:
+public:
-		ASCII8kbROMSlotHandler(MSX::MemorySlot &slot) : slot_(slot) {}
+	ASCII8kbROMSlotHandler(MSX::MemorySlot &slot) : slot_(slot) {}
 
-		void write(uint16_t address, uint8_t value, bool pc_is_outside_bios) final {
+	void write(const uint16_t address, const uint8_t value, const bool pc_is_outside_bios) final {
-			switch(address >> 11) {
+		switch(address >> 11) {
-				default:
+			default:
-					if(pc_is_outside_bios) confidence_counter_.add_miss();
+				if(pc_is_outside_bios) confidence_counter_.add_miss();
-				break;
+			break;
-				case 0xc:
+			case 0xc:
-					if(pc_is_outside_bios) {
+				if(pc_is_outside_bios) {
-						if(address == 0x6000 || address == 0x60ff) confidence_counter_.add_hit(); else confidence_counter_.add_equivocal();
+					hit_or_equivocal(address == 0x6000 || address == 0x60ff);
-					}
+				}
-					slot_.map(value * 0x2000, 0x4000, 0x2000);
+				slot_.map(value * 0x2000, 0x4000, 0x2000);
-				break;
+			break;
-				case 0xd:
+			case 0xd:
-					if(pc_is_outside_bios) {
+				if(pc_is_outside_bios) {
-						if(address == 0x6800 || address == 0x68ff) confidence_counter_.add_hit(); else confidence_counter_.add_equivocal();
+					hit_or_equivocal(address == 0x6800 || address == 0x68ff);
-					}
+				}
-					slot_.map(value * 0x2000, 0x6000, 0x2000);
+				slot_.map(value * 0x2000, 0x6000, 0x2000);
-				break;
+			break;
-				case 0xe:
+			case 0xe:
-					if(pc_is_outside_bios) {
+				if(pc_is_outside_bios) {
-						if(address == 0x7000 || address == 0x70ff) confidence_counter_.add_hit(); else confidence_counter_.add_equivocal();
+					hit_or_equivocal(address == 0x7000 || address == 0x70ff);
-					}
+				}
-					slot_.map(value * 0x2000, 0x8000, 0x2000);
+				slot_.map(value * 0x2000, 0x8000, 0x2000);
-				break;
+			break;
-				case 0xf:
+			case 0xf:
-					if(pc_is_outside_bios) {
+				if(pc_is_outside_bios) {
-						if(address == 0x7800 || address == 0x78ff) confidence_counter_.add_hit(); else confidence_counter_.add_equivocal();
+					hit_or_equivocal(address == 0x7800 || address == 0x78ff);
-					}
+				}
-					slot_.map(value * 0x2000, 0xa000, 0x2000);
+				slot_.map(value * 0x2000, 0xa000, 0x2000);
-				break;
+			break;
-			}
 		}
+	}
 
-		virtual std::string debug_type() final {
+	virtual std::string debug_type() final {
-			return "A8";
+		return "A8";
-		}
+	}
 
-	private:
+private:
-		MSX::MemorySlot &slot_;
+	MSX::MemorySlot &slot_;
 };
 
 }

Machines/MSX/Cartridges/Konami.hpp

@@ -13,39 +13,40 @@
 namespace MSX::Cartridge {
 
 class KonamiROMSlotHandler: public MemorySlotHandler {
-	public:
+public:
-		KonamiROMSlotHandler(MSX::MemorySlot &slot) : slot_(slot) {}
+	KonamiROMSlotHandler(MSX::MemorySlot &slot) : slot_(slot) {}
 
-		void write(uint16_t address, uint8_t value, bool pc_is_outside_bios) final {
+	void write(uint16_t address, uint8_t value, bool pc_is_outside_bios) final {
-			switch(address >> 13) {
+		switch(address >> 13) {
-				default:
+			default:
-					if(pc_is_outside_bios) confidence_counter_.add_miss();
+				if(pc_is_outside_bios) confidence_counter_.add_miss();
-				break;
+			break;
-				case 3:
+			case 3:
-					if(pc_is_outside_bios) {
+				if(pc_is_outside_bios) {
-						if(address == 0x6000) confidence_counter_.add_hit(); else confidence_counter_.add_equivocal();
+					hit_or_equivocal(address == 0x6000);
-					}
+				}
-					slot_.map(value * 0x2000, 0x6000, 0x2000);
+				slot_.map(value * 0x2000, 0x6000, 0x2000);
-				break;
+			break;
-				case 4:
+			case 4:
-					if(pc_is_outside_bios) {
+				if(pc_is_outside_bios) {
-						if(address == 0x8000) confidence_counter_.add_hit(); else confidence_counter_.add_equivocal();
+					hit_or_equivocal(address == 0x8000);
-					}
+				}
-					slot_.map(value * 0x2000, 0x8000, 0x2000);
+				slot_.map(value * 0x2000, 0x8000, 0x2000);
-				break;
+			break;
-				case 5:
+			case 5:
-					if(pc_is_outside_bios) {
+				if(pc_is_outside_bios) {
-						if(address == 0xa000) confidence_counter_.add_hit(); else confidence_counter_.add_equivocal();
+					hit_or_equivocal(address == 0xa000);
-					}
+				}
-					slot_.map(value * 0x2000, 0xa000, 0x2000);
+				slot_.map(value * 0x2000, 0xa000, 0x2000);
-				break;
+			break;
-			}
 		}
+	}
 
-		virtual std::string debug_type() final {
+	virtual std::string debug_type() final {
-			return "K";
+		return "K";
-		}
+	}
-	private:
+
+private:
 		MSX::MemorySlot &slot_;
 };
 

Machines/MSX/Cartridges/KonamiWithSCC.hpp

@@ -14,73 +14,73 @@
 namespace MSX::Cartridge {
 
 class KonamiWithSCCROMSlotHandler: public MemorySlotHandler {
-	public:
+public:
-		KonamiWithSCCROMSlotHandler(MSX::MemorySlot &slot, Konami::SCC &scc) :
+	KonamiWithSCCROMSlotHandler(MSX::MemorySlot &slot, Konami::SCC &scc) :
-			slot_(slot), scc_(scc) {}
+		slot_(slot), scc_(scc) {}
 
-		void write(uint16_t address, uint8_t value, bool pc_is_outside_bios) final {
+	void write(const uint16_t address, const uint8_t value, const bool pc_is_outside_bios) final {
-			switch(address >> 11) {
+		switch(address >> 11) {
-				default:
+			default:
+				if(pc_is_outside_bios) confidence_counter_.add_miss();
+			break;
+			case 0x0a:
+				if(pc_is_outside_bios) {
+					hit_or_equivocal(address == 0x5000);
+				}
+				slot_.map(value * 0x2000, 0x4000, 0x2000);
+			break;
+			case 0x0e:
+				if(pc_is_outside_bios) {
+					hit_or_equivocal(address == 0x7000);
+				}
+				slot_.map(value * 0x2000, 0x6000, 0x2000);
+			break;
+			case 0x12:
+				if(pc_is_outside_bios) {
+					hit_or_equivocal(address == 0x9000);
+				}
+				if((value&0x3f) == 0x3f) {
+					scc_is_visible_ = true;
+					slot_.map_handler(0x8000, 0x2000);
+				} else {
+					scc_is_visible_ = false;
+					slot_.map(value * 0x2000, 0x8000, 0x2000);
+				}
+			break;
+			case 0x13:
+				if(scc_is_visible_) {
+					if(pc_is_outside_bios) confidence_counter_.add_hit();
+					scc_.write(address, value);
+				} else {
 					if(pc_is_outside_bios) confidence_counter_.add_miss();
-				break;
+				}
-				case 0x0a:
+			break;
-					if(pc_is_outside_bios) {
+			case 0x16:
-						if(address == 0x5000) confidence_counter_.add_hit(); else confidence_counter_.add_equivocal();
+				if(pc_is_outside_bios) {
-					}
+					hit_or_equivocal(address == 0xb000);
-					slot_.map(value * 0x2000, 0x4000, 0x2000);
+				}
-				break;
+				slot_.map(value * 0x2000, 0xa000, 0x2000);
-				case 0x0e:
+			break;
-					if(pc_is_outside_bios) {
-						if(address == 0x7000) confidence_counter_.add_hit(); else confidence_counter_.add_equivocal();
-					}
-					slot_.map(value * 0x2000, 0x6000, 0x2000);
-				break;
-				case 0x12:
-					if(pc_is_outside_bios) {
-						if(address == 0x9000) confidence_counter_.add_hit(); else confidence_counter_.add_equivocal();
-					}
-					if((value&0x3f) == 0x3f) {
-						scc_is_visible_ = true;
-						slot_.map_handler(0x8000, 0x2000);
-					} else {
-						scc_is_visible_ = false;
-						slot_.map(value * 0x2000, 0x8000, 0x2000);
-					}
-				break;
-				case 0x13:
-					if(scc_is_visible_) {
-						if(pc_is_outside_bios) confidence_counter_.add_hit();
-						scc_.write(address, value);
-					} else {
-						if(pc_is_outside_bios) confidence_counter_.add_miss();
-					}
-				break;
-				case 0x16:
-					if(pc_is_outside_bios) {
-						if(address == 0xb000) confidence_counter_.add_hit(); else confidence_counter_.add_equivocal();
-					}
-					slot_.map(value * 0x2000, 0xa000, 0x2000);
-				break;
-			}
 		}
+	}
 
-		uint8_t read(uint16_t address) final {
+	uint8_t read(uint16_t address) final {
-			if(scc_is_visible_ && address >= 0x9800 && address < 0xa000) {
+		if(scc_is_visible_ && address >= 0x9800 && address < 0xa000) {
-				confidence_counter_.add_hit();
+			confidence_counter_.add_hit();
-				return scc_.read(address);
+			return scc_.read(address);
-			}
-			confidence_counter_.add_miss();
-			return 0xff;
 		}
+		confidence_counter_.add_miss();
+		return 0xff;
+	}
 
-		virtual std::string debug_type() final {
+	virtual std::string debug_type() final {
-			return "KSCC";
+		return "KSCC";
-		}
+	}
 
-	private:
+private:
-		MSX::MemorySlot &slot_;
+	MSX::MemorySlot &slot_;
-		Konami::SCC &scc_;
+	Konami::SCC &scc_;
-		bool scc_is_visible_ = false;
+	bool scc_is_visible_ = false;
 };
 
 }

Machines/MSX/DiskROM.hpp

@@ -21,22 +21,22 @@
 namespace MSX {
 
 class DiskROM: public MemorySlotHandler, public WD::WD1770 {
-	public:
+public:
-		DiskROM(MSX::MemorySlot &slot);
+	DiskROM(MSX::MemorySlot &slot);
 
-		void write(uint16_t address, uint8_t value, bool pc_is_outside_bios) final;
+	void write(uint16_t address, uint8_t value, bool pc_is_outside_bios) final;
-		uint8_t read(uint16_t address) final;
+	uint8_t read(uint16_t address) final;
-		void run_for(HalfCycles half_cycles) final;
+	void run_for(HalfCycles half_cycles) final;
 
-		void set_disk(std::shared_ptr<Storage::Disk::Disk> disk, size_t drive);
+	void set_disk(std::shared_ptr<Storage::Disk::Disk> disk, size_t drive);
-		void set_activity_observer(Activity::Observer *observer);
+	void set_activity_observer(Activity::Observer *observer);
 
-	private:
+private:
-		const std::vector<uint8_t> &rom_;
+	const std::vector<uint8_t> &rom_;
 
-		long int controller_cycles_ = 0;
+	long int controller_cycles_ = 0;
 
-		void set_head_load_request(bool head_load) final;
+	void set_head_load_request(bool head_load) final;
 };
 
 }

Machines/MSX/MemorySlotHandler.hpp

@@ -34,115 +34,122 @@ struct MemorySlotChangeHandler {
 };
 
 class MemorySlot {
-	public:
+public:
-		MemorySlot(MemorySlotChangeHandler &);
+	MemorySlot(MemorySlotChangeHandler &);
 
-		/// @returns A pointer to the area of memory currently underneath @c address that
+	/// @returns A pointer to the area of memory currently underneath @c address that
-		/// should be read
+	/// should be read
-		const uint8_t *read_pointer(int segment) const;
+	const uint8_t *read_pointer(int segment) const;
 
-		/// @returns A pointer to the area of memory currently underneath @c address.
+	/// @returns A pointer to the area of memory currently underneath @c address.
-		uint8_t *write_pointer(int segment) const;
+	uint8_t *write_pointer(int segment) const;
 
-		/// Copies an underlying source buffer.
+	/// Copies an underlying source buffer.
-		void set_source(const std::vector<uint8_t> &source);
+	void set_source(const std::vector<uint8_t> &source);
 
-		/// Sets the size of the underlying source buffer.
+	/// Sets the size of the underlying source buffer.
-		void resize_source(std::size_t);
+	void resize_source(std::size_t);
 
-		/// Provides a reference to the internal source storage.
+	/// Provides a reference to the internal source storage.
-		std::vector<uint8_t> &source();
+	std::vector<uint8_t> &source();
-		const std::vector<uint8_t> &source() const;
+	const std::vector<uint8_t> &source() const;
 
-		enum AccessType {
+	enum AccessType {
-			Read,
+		Read,
-			ReadWrite
+		ReadWrite
-		};
+	};
 
-		/// Maps the content from @c source_address in the buffer previously
+	/// Maps the content from @c source_address in the buffer previously
-		/// supplied to @c set_source to the region indicated by
+	/// supplied to @c set_source to the region indicated by
-		/// @c destination_address and @c length within @c subslot.
+	/// @c destination_address and @c length within @c subslot.
-		template <AccessType type = AccessType::Read> void map(
+	template <AccessType type = AccessType::Read> void map(
-			std::size_t source_address,
+		std::size_t source_address,
-			uint16_t destination_address,
+		uint16_t destination_address,
-			std::size_t length);
+		std::size_t length);
 
-		/// Marks the region indicated by @c destination_address and @c length
+	/// Marks the region indicated by @c destination_address and @c length
-		/// as requiring calls into this slot's MemorySlotHandler.
+	/// as requiring calls into this slot's MemorySlotHandler.
-		void map_handler(
+	void map_handler(
-			uint16_t destination_address,
+		uint16_t destination_address,
-			std::size_t length);
+		std::size_t length);
 
-		/// Marks the region indicated by @c destination_address and @c length
+	/// Marks the region indicated by @c destination_address and @c length
-		/// as unoccupied.
+	/// as unoccupied.
-		void unmap(
+	void unmap(
-			uint16_t destination_address,
+		uint16_t destination_address,
-			std::size_t length);
+		std::size_t length);
 
-	private:
+private:
-		std::vector<uint8_t> source_;
+	std::vector<uint8_t> source_;
-		uint8_t *read_pointers_[8];
+	uint8_t *read_pointers_[8];
-		uint8_t *write_pointers_[8];
+	uint8_t *write_pointers_[8];
 
-		MemorySlotChangeHandler &handler_;
+	MemorySlotChangeHandler &handler_;
 
-		using MemoryChunk = std::array<uint8_t, 8192>;
+	using MemoryChunk = std::array<uint8_t, 8192>;
-		inline static MemoryChunk unmapped{0xff};
+	inline static MemoryChunk unmapped{0xff};
-		inline static MemoryChunk scratch;
+	inline static MemoryChunk scratch;
 };
 
 class PrimarySlot {
-	public:
+public:
-		PrimarySlot(MemorySlotChangeHandler &);
+	PrimarySlot(MemorySlotChangeHandler &);
 
-		/// @returns A pointer to the area of memory currently underneath @c address that
+	/// @returns A pointer to the area of memory currently underneath @c address that
-		/// should be read
+	/// should be read
-		const uint8_t *read_pointer(int segment) const;
+	const uint8_t *read_pointer(int segment) const;
 
-		/// @returns A pointer to the area of memory currently underneath @c address.
+	/// @returns A pointer to the area of memory currently underneath @c address.
-		uint8_t *write_pointer(int segment) const;
+	uint8_t *write_pointer(int segment) const;
 
-		/// Attempts to write the argument as the secondary paging selection.
+	/// Attempts to write the argument as the secondary paging selection.
-		void set_secondary_paging(uint8_t);
+	void set_secondary_paging(uint8_t);
 
-		/// @returns The value most recently provided to @c set_secondary_paging.
+	/// @returns The value most recently provided to @c set_secondary_paging.
-		uint8_t secondary_paging() const;
+	uint8_t secondary_paging() const;
 
-		/// Indicates whether this slot supports secondary paging.
+	/// Indicates whether this slot supports secondary paging.
-		bool supports_secondary_paging = false;
+	bool supports_secondary_paging = false;
 
-		/// Provides the subslot at the specified index.
+	/// Provides the subslot at the specified index.
-		MemorySlot &subslot(int);
+	MemorySlot &subslot(int);
 
-	private:
+private:
-		MemorySlot subslots_[4];
+	MemorySlot subslots_[4];
-		uint8_t secondary_paging_ = 0;
+	uint8_t secondary_paging_ = 0;
 };
 
 class MemorySlotHandler {
-	public:
+public:
-		virtual ~MemorySlotHandler() = default;
+	virtual ~MemorySlotHandler() = default;
 
-		/*! Advances time by @c half_cycles. */
+	/*! Advances time by @c half_cycles. */
-		virtual void run_for([[maybe_unused]] HalfCycles half_cycles) {}
+	virtual void run_for([[maybe_unused]] HalfCycles half_cycles) {}
 
-		/*! Announces an attempt to write @c value to @c address. */
+	/*! Announces an attempt to write @c value to @c address. */
-		virtual void write(uint16_t address, uint8_t value, bool pc_is_outside_bios) = 0;
+	virtual void write(uint16_t address, uint8_t value, bool pc_is_outside_bios) = 0;
 
-		/*! Seeks the result of a read at @c address; this is used only if the area is unmapped. */
+	/*! Seeks the result of a read at @c address; this is used only if the area is unmapped. */
-		virtual uint8_t read([[maybe_unused]] uint16_t address) { return 0xff; }
+	virtual uint8_t read([[maybe_unused]] uint16_t address) { return 0xff; }
 
-		/*! @returns The probability that this handler is correct for the data it owns. */
+	/*! @returns The probability that this handler is correct for the data it owns. */
-		float get_confidence() {
+	float get_confidence() {
-			return confidence_counter_.confidence();
+		return confidence_counter_.confidence();
+	}
+
+	virtual std::string debug_type() {
+		return "";
+	}
+
+protected:
+	Analyser::Dynamic::ConfidenceCounter confidence_counter_;
+	void hit_or_equivocal(const bool is_hit) {
+		if(is_hit) {
+			confidence_counter_.add_hit();
+		} else {
+			confidence_counter_.add_equivocal();
 		}
-
+	}
-		virtual std::string debug_type() {
-			return "";
-		}
-
-	protected:
-		Analyser::Dynamic::ConfidenceCounter confidence_counter_;
 };
 
 }

Machines/MasterSystem/MasterSystem.cpp

@@ -40,42 +40,42 @@ namespace Sega {
 namespace MasterSystem {
 
 class Joystick: public Inputs::ConcreteJoystick {
-	public:
+public:
-		Joystick() :
+	Joystick() :
-			ConcreteJoystick({
+		ConcreteJoystick({
-				Input(Input::Up),
+			Input(Input::Up),
-				Input(Input::Down),
+			Input(Input::Down),
-				Input(Input::Left),
+			Input(Input::Left),
-				Input(Input::Right),
+			Input(Input::Right),
 
-				Input(Input::Fire, 0),
+			Input(Input::Fire, 0),
-				Input(Input::Fire, 1)
+			Input(Input::Fire, 1)
-			}) {}
+		}) {}
 
-		void did_set_input(const Input &digital_input, bool is_active) final {
+	void did_set_input(const Input &digital_input, bool is_active) final {
-			switch(digital_input.type) {
+		switch(digital_input.type) {
-				default: return;
+			default: return;
 
-				case Input::Up:		if(is_active) state_ &= ~0x01; else state_ |= 0x01;	break;
+			case Input::Up:		if(is_active) state_ &= ~0x01; else state_ |= 0x01;	break;
-				case Input::Down:	if(is_active) state_ &= ~0x02; else state_ |= 0x02;	break;
+			case Input::Down:	if(is_active) state_ &= ~0x02; else state_ |= 0x02;	break;
-				case Input::Left:	if(is_active) state_ &= ~0x04; else state_ |= 0x04;	break;
+			case Input::Left:	if(is_active) state_ &= ~0x04; else state_ |= 0x04;	break;
-				case Input::Right:	if(is_active) state_ &= ~0x08; else state_ |= 0x08;	break;
+			case Input::Right:	if(is_active) state_ &= ~0x08; else state_ |= 0x08;	break;
-				case Input::Fire:
+			case Input::Fire:
-					switch(digital_input.info.control.index) {
+				switch(digital_input.info.control.index) {
-						default: break;
+					default: break;
-						case 0:	if(is_active) state_ &= ~0x10; else state_ |= 0x10;		break;
+					case 0:	if(is_active) state_ &= ~0x10; else state_ |= 0x10;		break;
-						case 1:	if(is_active) state_ &= ~0x20; else state_ |= 0x20;		break;
+					case 1:	if(is_active) state_ &= ~0x20; else state_ |= 0x20;		break;
-					}
+				}
-				break;
+			break;
-			}
 		}
+	}
 
-		uint8_t get_state() {
+	uint8_t get_state() {
-			return state_;
+		return state_;
-		}
+	}
 
-	private:
+private:
-		uint8_t state_ = 0xff;
+	uint8_t state_ = 0xff;
 };
 
 template <Analyser::Static::Sega::Target::Model model> class ConcreteMachine:
@@ -90,282 +90,282 @@ template <Analyser::Static::Sega::Target::Model model> class ConcreteMachine:
 	public MachineTypes::ScanProducer,
 	public MachineTypes::TimedMachine {
 
-	public:
+public:
-		ConcreteMachine(const Analyser::Static::Sega::Target &target, const ROMMachine::ROMFetcher &rom_fetcher) :
+	ConcreteMachine(const Analyser::Static::Sega::Target &target, const ROMMachine::ROMFetcher &rom_fetcher) :
-			region_(target.region),
+		region_(target.region),
-			paging_scheme_(target.paging_scheme),
+		paging_scheme_(target.paging_scheme),
-			z80_(*this),
+		z80_(*this),
-			sn76489_(
+		sn76489_(
-				(target.model == Target::Model::SG1000) ? TI::SN76489::Personality::SN76489 : TI::SN76489::Personality::SMS,
+			(target.model == Target::Model::SG1000) ? TI::SN76489::Personality::SN76489 : TI::SN76489::Personality::SMS,
-				audio_queue_,
+			audio_queue_,
-				audio_divider),
+			audio_divider),
-			opll_(audio_queue_, audio_divider),
+		opll_(audio_queue_, audio_divider),
-			mixer_(sn76489_, opll_),
+		mixer_(sn76489_, opll_),
-			speaker_(mixer_),
+		speaker_(mixer_),
-			keyboard_({Inputs::Keyboard::Key::Enter, Inputs::Keyboard::Key::Escape}, {}) {
+		keyboard_({Inputs::Keyboard::Key::Enter, Inputs::Keyboard::Key::Escape}, {}) {
-			// Pick the clock rate based on the region.
+		// Pick the clock rate based on the region.
-			const double clock_rate = target.region == Target::Region::Europe ? 3546893.0 : 3579540.0;
+		const double clock_rate = target.region == Target::Region::Europe ? 3546893.0 : 3579540.0;
-			speaker_.set_input_rate(float(clock_rate / audio_divider));
+		speaker_.set_input_rate(float(clock_rate / audio_divider));
-			set_clock_rate(clock_rate);
+		set_clock_rate(clock_rate);
 
-			// Instantiate the joysticks.
+		// Instantiate the joysticks.
-			joysticks_.emplace_back(new Joystick);
+		joysticks_.emplace_back(new Joystick);
-			joysticks_.emplace_back(new Joystick);
+		joysticks_.emplace_back(new Joystick);
 
-			// Clear the memory map.
+		// Clear the memory map.
-			map(read_pointers_, nullptr, 0x10000, 0);
+		map(read_pointers_, nullptr, 0x10000, 0);
-			map(write_pointers_, nullptr, 0x10000, 0);
+		map(write_pointers_, nullptr, 0x10000, 0);
 
-			// Take a copy of the cartridge and place it into memory.
+		// Take a copy of the cartridge and place it into memory.
-			if(!target.media.cartridges.empty()) {
+		if(!target.media.cartridges.empty()) {
-				cartridge_ = target.media.cartridges[0]->get_segments()[0].data;
+			cartridge_ = target.media.cartridges[0]->get_segments()[0].data;
-			}
+		}
-			if(cartridge_.size() < 48*1024) {
+		if(cartridge_.size() < 48*1024) {
-				std::size_t new_space = 48*1024 - cartridge_.size();
+			std::size_t new_space = 48*1024 - cartridge_.size();
-				cartridge_.resize(48*1024);
+			cartridge_.resize(48*1024);
-				memset(&cartridge_[48*1024 - new_space], 0xff, new_space);
+			memset(&cartridge_[48*1024 - new_space], 0xff, new_space);
-			}
-
-			if(paging_scheme_ == Target::PagingScheme::Codemasters) {
-				// The Codemasters cartridges start with pages 0, 1 and 0 again initially visible.
-				paging_registers_[0] = 0;
-				paging_registers_[1] = 1;
-				paging_registers_[2] = 0;
-			}
-
-			// Load the BIOS if available.
-			//
-			// TODO: there's probably a million other versions of the Master System BIOS; try to build a
-			// CRC32 catalogue of those. So far:
-			//
-			//	0072ed54 = US/European BIOS 1.3
-			//	48d44a13 = Japanese BIOS 2.1
-			const bool is_japanese = target.region == Target::Region::Japan;
-			const ROM::Name bios_name = is_japanese ? ROM::Name::MasterSystemJapaneseBIOS : ROM::Name::MasterSystemWesternBIOS;
-			ROM::Request request(bios_name, true);
-			auto roms = rom_fetcher(request);
-			request.validate(roms);
-
-			const auto rom = roms.find(bios_name);
-			if(rom == roms.end()) {
-				// No BIOS found; attempt to boot as though it has already disabled itself.
-				has_bios_ = false;
-				memory_control_ |= 0x08;
-				std::cerr << "No BIOS found; attempting to start cartridge directly" << std::endl;
-			} else {
-				has_bios_ = true;
-				memcpy(&bios_, rom->second.data(), std::min(sizeof(bios_), rom->second.size()));
-			}
-			page_cartridge();
-
-			// Map RAM.
-			if constexpr (is_master_system(model)) {
-				map(read_pointers_, ram_, 8*1024, 0xc000, 0x10000);
-				map(write_pointers_, ram_, 8*1024, 0xc000, 0x10000);
-			} else {
-				map(read_pointers_, ram_, 1024, 0xc000, 0x10000);
-				map(write_pointers_, ram_, 1024, 0xc000, 0x10000);
-			}
-
-			// Apply a relatively low low-pass filter. More guidance needed here.
-			// TODO: this is disabled for now since it isn't applicable for the FM chip, I think.
-//			speaker_.set_high_frequency_cutoff(8000);
-
-			// Set default mixer levels: FM off, SN full-throttle.
-			set_mixer_levels(0);
-
-			keyboard_.set_delegate(this);
 		}
 
-		~ConcreteMachine() {
+		if(paging_scheme_ == Target::PagingScheme::Codemasters) {
-			audio_queue_.flush();
+			// The Codemasters cartridges start with pages 0, 1 and 0 again initially visible.
+			paging_registers_[0] = 0;
+			paging_registers_[1] = 1;
+			paging_registers_[2] = 0;
 		}
 
-		ChangeEffect effect_for_file_did_change(const std::string &) const final {
+		// Load the BIOS if available.
-			return ChangeEffect::RestartMachine;
+		//
+		// TODO: there's probably a million other versions of the Master System BIOS; try to build a
+		// CRC32 catalogue of those. So far:
+		//
+		//	0072ed54 = US/European BIOS 1.3
+		//	48d44a13 = Japanese BIOS 2.1
+		const bool is_japanese = target.region == Target::Region::Japan;
+		const ROM::Name bios_name = is_japanese ? ROM::Name::MasterSystemJapaneseBIOS : ROM::Name::MasterSystemWesternBIOS;
+		ROM::Request request(bios_name, true);
+		auto roms = rom_fetcher(request);
+		request.validate(roms);
+
+		const auto rom = roms.find(bios_name);
+		if(rom == roms.end()) {
+			// No BIOS found; attempt to boot as though it has already disabled itself.
+			has_bios_ = false;
+			memory_control_ |= 0x08;
+			std::cerr << "No BIOS found; attempting to start cartridge directly" << std::endl;
+		} else {
+			has_bios_ = true;
+			memcpy(&bios_, rom->second.data(), std::min(sizeof(bios_), rom->second.size()));
+		}
+		page_cartridge();
+
+		// Map RAM.
+		if constexpr (is_master_system(model)) {
+			map(read_pointers_, ram_, 8*1024, 0xc000, 0x10000);
+			map(write_pointers_, ram_, 8*1024, 0xc000, 0x10000);
+		} else {
+			map(read_pointers_, ram_, 1024, 0xc000, 0x10000);
+			map(write_pointers_, ram_, 1024, 0xc000, 0x10000);
 		}
 
-		void set_scan_target(Outputs::Display::ScanTarget *scan_target) final {
+		// Apply a relatively low low-pass filter. More guidance needed here.
-			vdp_.last_valid()->set_tv_standard(
+		// TODO: this is disabled for now since it isn't applicable for the FM chip, I think.
-				(region_ == Target::Region::Europe) ?
+//		speaker_.set_high_frequency_cutoff(8000);
-					TI::TMS::TVStandard::PAL : TI::TMS::TVStandard::NTSC);
 
-			// Doing the following would be technically correct, but isn't
+		// Set default mixer levels: FM off, SN full-throttle.
-			// especially thread-safe and won't make a substantial difference.
+		set_mixer_levels(0);
-//			time_until_debounce_ = vdp_->get_time_until_line(-1);
 
-			vdp_.last_valid()->set_scan_target(scan_target);
+		keyboard_.set_delegate(this);
+	}
+
+	~ConcreteMachine() {
+		audio_queue_.flush();
+	}
+
+	ChangeEffect effect_for_file_did_change(const std::string &) const final {
+		return ChangeEffect::RestartMachine;
+	}
+
+	void set_scan_target(Outputs::Display::ScanTarget *scan_target) final {
+		vdp_.last_valid()->set_tv_standard(
+			(region_ == Target::Region::Europe) ?
+				TI::TMS::TVStandard::PAL : TI::TMS::TVStandard::NTSC);
+
+		// Doing the following would be technically correct, but isn't
+		// especially thread-safe and won't make a substantial difference.
+//		time_until_debounce_ = vdp_->get_time_until_line(-1);
+
+		vdp_.last_valid()->set_scan_target(scan_target);
+	}
+
+	Outputs::Display::ScanStatus get_scaled_scan_status() const final {
+		return vdp_.last_valid()->get_scaled_scan_status();
+	}
+
+	void set_display_type(Outputs::Display::DisplayType display_type) final {
+		vdp_.last_valid()->set_display_type(display_type);
+	}
+
+	Outputs::Display::DisplayType get_display_type() const final {
+		return vdp_.last_valid()->get_display_type();
+	}
+
+	Outputs::Speaker::Speaker *get_speaker() final {
+		return &speaker_;
+	}
+
+	void run_for(const Cycles cycles) final {
+		z80_.run_for(cycles);
+	}
+
+	void flush_output(int outputs) final {
+		if(outputs & Output::Video) {
+			vdp_.flush();
 		}
-
+		if(outputs & Output::Audio) {
-		Outputs::Display::ScanStatus get_scaled_scan_status() const final {
+			update_audio();
-			return vdp_.last_valid()->get_scaled_scan_status();
+			audio_queue_.perform();
 		}
+	}
 
-		void set_display_type(Outputs::Display::DisplayType display_type) final {
+	forceinline HalfCycles perform_machine_cycle(const CPU::Z80::PartialMachineCycle &cycle) {
-			vdp_.last_valid()->set_display_type(display_type);
+		if(vdp_ += cycle.length) {
+			z80_.set_interrupt_line(vdp_->get_interrupt_line(), vdp_.last_sequence_point_overrun());
 		}
+		time_since_sn76489_update_ += cycle.length;
 
-		Outputs::Display::DisplayType get_display_type() const final {
+		if(cycle.is_terminal()) {
-			return vdp_.last_valid()->get_display_type();
+			uint16_t address = cycle.address ? *cycle.address : 0x0000;
-		}
+			switch(cycle.operation) {
+				case CPU::Z80::PartialMachineCycle::ReadOpcode:
+				case CPU::Z80::PartialMachineCycle::Read:
+					*cycle.value = read_pointers_[address >> 10] ? read_pointers_[address >> 10][address & 1023] : 0xff;
+				break;
 
-		Outputs::Speaker::Speaker *get_speaker() final {
+				case CPU::Z80::PartialMachineCycle::Write:
-			return &speaker_;
+					if(paging_scheme_ == Target::PagingScheme::Sega) {
-		}
+						if(address >= 0xfffd && cartridge_.size() > 48*1024) {
-
+							if(paging_registers_[address - 0xfffd] != *cycle.value) {
-		void run_for(const Cycles cycles) final {
+								paging_registers_[address - 0xfffd] = *cycle.value;
-			z80_.run_for(cycles);
+								page_cartridge();
-		}
-
-		void flush_output(int outputs) final {
-			if(outputs & Output::Video) {
-				vdp_.flush();
-			}
-			if(outputs & Output::Audio) {
-				update_audio();
-				audio_queue_.perform();
-			}
-		}
-
-		forceinline HalfCycles perform_machine_cycle(const CPU::Z80::PartialMachineCycle &cycle) {
-			if(vdp_ += cycle.length) {
-				z80_.set_interrupt_line(vdp_->get_interrupt_line(), vdp_.last_sequence_point_overrun());
-			}
-			time_since_sn76489_update_ += cycle.length;
-
-			if(cycle.is_terminal()) {
-				uint16_t address = cycle.address ? *cycle.address : 0x0000;
-				switch(cycle.operation) {
-					case CPU::Z80::PartialMachineCycle::ReadOpcode:
-					case CPU::Z80::PartialMachineCycle::Read:
-						*cycle.value = read_pointers_[address >> 10] ? read_pointers_[address >> 10][address & 1023] : 0xff;
-					break;
-
-					case CPU::Z80::PartialMachineCycle::Write:
-						if(paging_scheme_ == Target::PagingScheme::Sega) {
-							if(address >= 0xfffd && cartridge_.size() > 48*1024) {
-								if(paging_registers_[address - 0xfffd] != *cycle.value) {
-									paging_registers_[address - 0xfffd] = *cycle.value;
-									page_cartridge();
-								}
-							}
-						} else {
-							// i.e. this is the Codemasters paging scheme.
-							if(!(address&0x3fff) && address < 0xc000) {
-								if(paging_registers_[address >> 14] != *cycle.value) {
-									paging_registers_[address >> 14] = *cycle.value;
-									page_cartridge();
-								}
 							}
 						}
+					} else {
+						// i.e. this is the Codemasters paging scheme.
+						if(!(address&0x3fff) && address < 0xc000) {
+							if(paging_registers_[address >> 14] != *cycle.value) {
+								paging_registers_[address >> 14] = *cycle.value;
+								page_cartridge();
+							}
+						}
+					}
 
-						if(write_pointers_[address >> 10]) write_pointers_[address >> 10][address & 1023] = *cycle.value;
+					if(write_pointers_[address >> 10]) write_pointers_[address >> 10][address & 1023] = *cycle.value;
-//						else logger.info().append("Ignored write to ROM");
+//					else logger.info().append("Ignored write to ROM");
-					break;
+				break;
 
-					case CPU::Z80::PartialMachineCycle::Input:
+				case CPU::Z80::PartialMachineCycle::Input:
-						switch(address & 0xc1) {
+					switch(address & 0xc1) {
-							case 0x00:
+						case 0x00:
-								logger.error().append("TODO: [input] memory control");
+							logger.error().append("TODO: [input] memory control");
-								*cycle.value = 0xff;
+							*cycle.value = 0xff;
-							break;
+						break;
-							case 0x01:
+						case 0x01:
-								logger.error().append("TODO: [input] I/O port control");
+							logger.error().append("TODO: [input] I/O port control");
-								*cycle.value = 0xff;
+							*cycle.value = 0xff;
-							break;
+						break;
-							case 0x40:
+						case 0x40:
-								*cycle.value = vdp_->get_current_line();
+							*cycle.value = vdp_->get_current_line();
-							break;
+						break;
-							case 0x41:
+						case 0x41:
-								*cycle.value = vdp_.last_valid()->get_latched_horizontal_counter();
+							*cycle.value = vdp_.last_valid()->get_latched_horizontal_counter();
-							break;
+						break;
-							case 0x80: case 0x81:
+						case 0x80: case 0x81:
-								*cycle.value = vdp_->read(address);
+							*cycle.value = vdp_->read(address);
-								z80_.set_interrupt_line(vdp_->get_interrupt_line());
+							z80_.set_interrupt_line(vdp_->get_interrupt_line());
-							break;
+						break;
-							case 0xc0: {
+						case 0xc0: {
-								if(memory_control_ & 0x4) {
+							if(memory_control_ & 0x4) {
-									if(has_fm_audio_ && (address & 0xff) == 0xf2) {
+								if(has_fm_audio_ && (address & 0xff) == 0xf2) {
-										*cycle.value = opll_detection_word_;
+									*cycle.value = opll_detection_word_;
-									} else {
-										*cycle.value = 0xff;
-									}
 								} else {
-									Joystick *const joypad1 = static_cast<Joystick *>(joysticks_[0].get());
-									Joystick *const joypad2 = static_cast<Joystick *>(joysticks_[1].get());
-									*cycle.value = uint8_t(joypad1->get_state() | (joypad2->get_state() << 6));
-								}
-							} break;
-							case 0xc1: {
-								if(memory_control_ & 0x4) {
 									*cycle.value = 0xff;
-								} else {
-									Joystick *const joypad2 = static_cast<Joystick *>(joysticks_[1].get());
-
-									*cycle.value =
-										(joypad2->get_state() >> 2) |
-										0x30 |
-										get_th_values();
 								}
-							} break;
+							} else {
+								Joystick *const joypad1 = static_cast<Joystick *>(joysticks_[0].get());
+								Joystick *const joypad2 = static_cast<Joystick *>(joysticks_[1].get());
+								*cycle.value = uint8_t(joypad1->get_state() | (joypad2->get_state() << 6));
+							}
+						} break;
+						case 0xc1: {
+							if(memory_control_ & 0x4) {
+								*cycle.value = 0xff;
+							} else {
+								Joystick *const joypad2 = static_cast<Joystick *>(joysticks_[1].get());
 
-							default:
+								*cycle.value =
-								logger.error().append("[input] Clearly some sort of typo");
+									(joypad2->get_state() >> 2) |
-							break;
+									0x30 |
-						}
+									get_th_values();
-					break;
+							}
+						} break;
 
-					case CPU::Z80::PartialMachineCycle::Output:
+						default:
-						switch(address & 0xc1) {
+							logger.error().append("[input] Clearly some sort of typo");
-							case 0x00:		// i.e. even ports less than 0x40.
+						break;
-								if constexpr (is_master_system(model)) {
+					}
-									// TODO: Obey the RAM enable.
+				break;
-									logger.info().append("Memory control: %02x", memory_control_);
+
-									memory_control_ = *cycle.value;
+				case CPU::Z80::PartialMachineCycle::Output:
-									page_cartridge();
+					switch(address & 0xc1) {
+						case 0x00:		// i.e. even ports less than 0x40.
+							if constexpr (is_master_system(model)) {
+								// TODO: Obey the RAM enable.
+								logger.info().append("Memory control: %02x", memory_control_);
+								memory_control_ = *cycle.value;
+								page_cartridge();
+							}
+						break;
+						case 0x01: {	// i.e. odd ports less than 0x40.
+							// A programmer can force the TH lines to 0 here,
+							// causing a phoney lightgun latch, so check for any
+							// discontinuity in TH inputs.
+							const auto previous_ths = get_th_values();
+							io_port_control_ = *cycle.value;
+							const auto new_ths = get_th_values();
+
+							// Latch if either TH has newly gone to 1.
+							if((new_ths^previous_ths)&new_ths) {
+								vdp_->latch_horizontal_counter();
+							}
+						} break;
+						case 0x40: case 0x41:	// i.e. ports 0x40–0x7f.
+							update_audio();
+							sn76489_.write(*cycle.value);
+						break;
+						case 0x80: case 0x81:	// i.e. ports 0x80–0xbf.
+							vdp_->write(address, *cycle.value);
+							z80_.set_interrupt_line(vdp_->get_interrupt_line());
+						break;
+						case 0xc1: case 0xc0:	// i.e. ports 0xc0–0xff.
+							if(has_fm_audio_) {
+								switch(address & 0xff) {
+									case 0xf0: case 0xf1:
+										update_audio();
+										opll_.write(address, *cycle.value);
+									break;
+									case 0xf2:
+										opll_detection_word_ = *cycle.value;
+										set_mixer_levels(opll_detection_word_);
+									break;
 								}
-							break;
+							}
-							case 0x01: {	// i.e. odd ports less than 0x40.
+						break;
-								// A programmer can force the TH lines to 0 here,
-								// causing a phoney lightgun latch, so check for any
-								// discontinuity in TH inputs.
-								const auto previous_ths = get_th_values();
-								io_port_control_ = *cycle.value;
-								const auto new_ths = get_th_values();
 
-								// Latch if either TH has newly gone to 1.
+						default:
-								if((new_ths^previous_ths)&new_ths) {
+							logger.error().append("[output] Clearly some sort of typo");
-									vdp_->latch_horizontal_counter();
+						break;
-								}
+					}
-							} break;
+				break;
-							case 0x40: case 0x41:	// i.e. ports 0x40–0x7f.
-								update_audio();
-								sn76489_.write(*cycle.value);
-							break;
-							case 0x80: case 0x81:	// i.e. ports 0x80–0xbf.
-								vdp_->write(address, *cycle.value);
-								z80_.set_interrupt_line(vdp_->get_interrupt_line());
-							break;
-							case 0xc1: case 0xc0:	// i.e. ports 0xc0–0xff.
-								if(has_fm_audio_) {
-									switch(address & 0xff) {
-										case 0xf0: case 0xf1:
-											update_audio();
-											opll_.write(address, *cycle.value);
-										break;
-										case 0xf2:
-											opll_detection_word_ = *cycle.value;
-											set_mixer_levels(opll_detection_word_);
-										break;
-									}
-								}
-							break;
-
-							default:
-								logger.error().append("[output] Clearly some sort of typo");
-							break;
-						}
-					break;
 
 /*
 	TODO: implementation of the below is incomplete.
@@ -380,181 +380,181 @@ template <Analyser::Static::Sega::Target::Model model> class ConcreteMachine:
 	— Charles MacDonald
  */
 
-					case CPU::Z80::PartialMachineCycle::Interrupt:
+				case CPU::Z80::PartialMachineCycle::Interrupt:
-						*cycle.value = 0xff;
+					*cycle.value = 0xff;
-					break;
+				break;
 
-					default: break;
+				default: break;
-				}
-			}
-
-			// The pause button is debounced and takes effect only one line before pixels
-			// begin; time_until_debounce_ keeps track of the time until then.
-			time_until_debounce_ -= cycle.length;
-			if(time_until_debounce_ <= HalfCycles(0)) {
-				z80_.set_non_maskable_interrupt_line(pause_is_pressed_);
-				time_until_debounce_ = vdp_->get_time_until_line(-1);
-			}
-
-			return HalfCycles(0);
-		}
-
-		const std::vector<std::unique_ptr<Inputs::Joystick>> &get_joysticks() final {
-			return joysticks_;
-		}
-
-		// MARK: - Keyboard (i.e. the pause and reset buttons).
-		Inputs::Keyboard &get_keyboard() final {
-			return keyboard_;
-		}
-
-		bool keyboard_did_change_key(Inputs::Keyboard &, Inputs::Keyboard::Key key, bool is_pressed) final {
-			if(key == Inputs::Keyboard::Key::Enter) {
-				pause_is_pressed_ = is_pressed;
-				return true;
-			}
-
-			if(key == Inputs::Keyboard::Key::Escape) {
-				reset_is_pressed_ = is_pressed;
-				return true;
-			}
-
-			return false;
-		}
-
-		void reset_all_keys(Inputs::Keyboard &) final {
-		}
-
-		// MARK: - Configuration options.
-		std::unique_ptr<Reflection::Struct> get_options() const final {
-			auto options = std::make_unique<Options>(Configurable::OptionsType::UserFriendly);
-			options->output = get_video_signal_configurable();
-			return options;
-		}
-
-		void set_options(const std::unique_ptr<Reflection::Struct> &str) final {
-			const auto options = dynamic_cast<Options *>(str.get());
-			set_video_signal_configurable(options->output);
-		}
-
-	private:
-		static constexpr TI::TMS::Personality tms_personality() {
-			switch(model) {
-				default:
-				case Target::Model::SG1000:			return TI::TMS::TMS9918A;
-				case Target::Model::MasterSystem:	return TI::TMS::SMSVDP;
-				case Target::Model::MasterSystem2:	return TI::TMS::SMS2VDP;
 			}
 		}
 
-		inline uint8_t get_th_values() {
+		// The pause button is debounced and takes effect only one line before pixels
-			// Quick not on TH inputs here: if either is setup as an output, then the
+		// begin; time_until_debounce_ keeps track of the time until then.
-			// currently output level is returned. Otherwise they're fixed at 1.
+		time_until_debounce_ -= cycle.length;
-			return
+		if(time_until_debounce_ <= HalfCycles(0)) {
-				uint8_t(
+			z80_.set_non_maskable_interrupt_line(pause_is_pressed_);
-					((io_port_control_ & 0x02) << 5) | ((io_port_control_&0x20) << 1) |
+			time_until_debounce_ = vdp_->get_time_until_line(-1);
-					((io_port_control_ & 0x08) << 4) | (io_port_control_&0x80)
-				);
-
 		}
 
-		inline void update_audio() {
+		return HalfCycles(0);
-			speaker_.run_for(audio_queue_, time_since_sn76489_update_.divide_cycles(Cycles(audio_divider)));
+	}
+
+	const std::vector<std::unique_ptr<Inputs::Joystick>> &get_joysticks() final {
+		return joysticks_;
+	}
+
+	// MARK: - Keyboard (i.e. the pause and reset buttons).
+	Inputs::Keyboard &get_keyboard() final {
+		return keyboard_;
+	}
+
+	bool keyboard_did_change_key(Inputs::Keyboard &, Inputs::Keyboard::Key key, bool is_pressed) final {
+		if(key == Inputs::Keyboard::Key::Enter) {
+			pause_is_pressed_ = is_pressed;
+			return true;
 		}
 
-		void set_mixer_levels(uint8_t mode) {
+		if(key == Inputs::Keyboard::Key::Escape) {
-			// This is as per the audio control register;
+			reset_is_pressed_ = is_pressed;
-			// see https://www.smspower.org/Development/AudioControlPort
+			return true;
-			update_audio();
-			audio_queue_.enqueue([this, mode] {
-				switch(mode & 3) {
-					case 0:	// SN76489 only; the default.
-						mixer_.set_relative_volumes({1.0f, 0.0f});
-					break;
-
-					case 1: // FM only.
-						mixer_.set_relative_volumes({0.0f, 1.0f});
-					break;
-
-					case 2: // No audio.
-						mixer_.set_relative_volumes({0.0f, 0.0f});
-					break;
-
-					case 3: // Both FM and SN76489.
-						mixer_.set_relative_volumes({0.5f, 0.5f});
-					break;
-				}
-			});
 		}
 
-		using Target = Analyser::Static::Sega::Target;
+		return false;
-		const Target::Region region_;
+	}
-		const Target::PagingScheme paging_scheme_;
-		CPU::Z80::Processor<ConcreteMachine, false, false> z80_;
-		JustInTimeActor<TI::TMS::TMS9918<tms_personality()>> vdp_;
 
-		Concurrency::AsyncTaskQueue<false> audio_queue_;
+	void reset_all_keys(Inputs::Keyboard &) final {
-		TI::SN76489 sn76489_;
+	}
-		Yamaha::OPL::OPLL opll_;
-		Outputs::Speaker::CompoundSource<decltype(sn76489_), decltype(opll_)> mixer_;
-		Outputs::Speaker::PullLowpass<decltype(mixer_)> speaker_;
-		uint8_t opll_detection_word_ = 0xff;
 
-		std::vector<std::unique_ptr<Inputs::Joystick>> joysticks_;
+	// MARK: - Configuration options.
-		Inputs::Keyboard keyboard_;
+	std::unique_ptr<Reflection::Struct> get_options() const final {
-		bool reset_is_pressed_ = false, pause_is_pressed_ = false;
+		auto options = std::make_unique<Options>(Configurable::OptionsType::UserFriendly);
+		options->output = get_video_signal_configurable();
+		return options;
+	}
 
-		HalfCycles time_since_sn76489_update_;
+	void set_options(const std::unique_ptr<Reflection::Struct> &str) final {
-		HalfCycles time_until_debounce_;
+		const auto options = dynamic_cast<Options *>(str.get());
+		set_video_signal_configurable(options->output);
+	}
 
-		uint8_t ram_[8*1024];
+private:
-		uint8_t bios_[8*1024];
+	static constexpr TI::TMS::Personality tms_personality() {
-		std::vector<uint8_t> cartridge_;
+		switch(model) {
+			default:
+			case Target::Model::SG1000:			return TI::TMS::TMS9918A;
+			case Target::Model::MasterSystem:	return TI::TMS::SMSVDP;
+			case Target::Model::MasterSystem2:	return TI::TMS::SMS2VDP;
+		}
+	}
 
-		uint8_t io_port_control_ = 0x0f;
+	inline uint8_t get_th_values() {
+		// Quick not on TH inputs here: if either is setup as an output, then the
+		// currently output level is returned. Otherwise they're fixed at 1.
+		return
+			uint8_t(
+				((io_port_control_ & 0x02) << 5) | ((io_port_control_&0x20) << 1) |
+				((io_port_control_ & 0x08) << 4) | (io_port_control_&0x80)
+			);
 
-		// This is a static constexpr for now; I may use it in the future.
+	}
-		static constexpr bool has_fm_audio_ = true;
 
-		// The memory map has a 1kb granularity; this is determined by the SG1000's 1kb of RAM.
+	inline void update_audio() {
-		const uint8_t *read_pointers_[64];
+		speaker_.run_for(audio_queue_, time_since_sn76489_update_.divide_cycles(Cycles(audio_divider)));
-		uint8_t *write_pointers_[64];
+	}
-		template <typename T> void map(T **target, uint8_t *source, size_t size, size_t start_address, size_t end_address = 0) {
+
-			if(!end_address) end_address = start_address + size;
+	void set_mixer_levels(uint8_t mode) {
-			for(auto address = start_address; address < end_address; address += 1024) {
+		// This is as per the audio control register;
-				target[address >> 10] = source ? &source[(address - start_address) & (size - 1)] : nullptr;
+		// see https://www.smspower.org/Development/AudioControlPort
+		update_audio();
+		audio_queue_.enqueue([this, mode] {
+			switch(mode & 3) {
+				case 0:	// SN76489 only; the default.
+					mixer_.set_relative_volumes({1.0f, 0.0f});
+				break;
+
+				case 1: // FM only.
+					mixer_.set_relative_volumes({0.0f, 1.0f});
+				break;
+
+				case 2: // No audio.
+					mixer_.set_relative_volumes({0.0f, 0.0f});
+				break;
+
+				case 3: // Both FM and SN76489.
+					mixer_.set_relative_volumes({0.5f, 0.5f});
+				break;
 			}
+		});
+	}
+
+	using Target = Analyser::Static::Sega::Target;
+	const Target::Region region_;
+	const Target::PagingScheme paging_scheme_;
+	CPU::Z80::Processor<ConcreteMachine, false, false> z80_;
+	JustInTimeActor<TI::TMS::TMS9918<tms_personality()>> vdp_;
+
+	Concurrency::AsyncTaskQueue<false> audio_queue_;
+	TI::SN76489 sn76489_;
+	Yamaha::OPL::OPLL opll_;
+	Outputs::Speaker::CompoundSource<decltype(sn76489_), decltype(opll_)> mixer_;
+	Outputs::Speaker::PullLowpass<decltype(mixer_)> speaker_;
+	uint8_t opll_detection_word_ = 0xff;
+
+	std::vector<std::unique_ptr<Inputs::Joystick>> joysticks_;
+	Inputs::Keyboard keyboard_;
+	bool reset_is_pressed_ = false, pause_is_pressed_ = false;
+
+	HalfCycles time_since_sn76489_update_;
+	HalfCycles time_until_debounce_;
+
+	uint8_t ram_[8*1024];
+	uint8_t bios_[8*1024];
+	std::vector<uint8_t> cartridge_;
+
+	uint8_t io_port_control_ = 0x0f;
+
+	// This is a static constexpr for now; I may use it in the future.
+	static constexpr bool has_fm_audio_ = true;
+
+	// The memory map has a 1kb granularity; this is determined by the SG1000's 1kb of RAM.
+	const uint8_t *read_pointers_[64];
+	uint8_t *write_pointers_[64];
+	template <typename T> void map(T **target, uint8_t *source, size_t size, size_t start_address, size_t end_address = 0) {
+		if(!end_address) end_address = start_address + size;
+		for(auto address = start_address; address < end_address; address += 1024) {
+			target[address >> 10] = source ? &source[(address - start_address) & (size - 1)] : nullptr;
 		}
+	}
 
-		uint8_t paging_registers_[3] = {0, 1, 2};
+	uint8_t paging_registers_[3] = {0, 1, 2};
-		uint8_t memory_control_ = 0;
+	uint8_t memory_control_ = 0;
-		void page_cartridge() {
+	void page_cartridge() {
-			// Either install the cartridge or don't; Japanese machines can't see
+		// Either install the cartridge or don't; Japanese machines can't see
-			// anything but the cartridge.
+		// anything but the cartridge.
-			if(!(memory_control_ & 0x40) || region_ == Target::Region::Japan) {
+		if(!(memory_control_ & 0x40) || region_ == Target::Region::Japan) {
-				for(size_t c = 0; c < 3; ++c) {
+			for(size_t c = 0; c < 3; ++c) {
-					const size_t start_addr = (paging_registers_[c] * 0x4000) % cartridge_.size();
+				const size_t start_addr = (paging_registers_[c] * 0x4000) % cartridge_.size();
-					map(
+				map(
-						read_pointers_,
+					read_pointers_,
-						cartridge_.data() + start_addr,
+					cartridge_.data() + start_addr,
-						std::min(size_t(0x4000), cartridge_.size() - start_addr),
+					std::min(size_t(0x4000), cartridge_.size() - start_addr),
-						c * 0x4000);
+					c * 0x4000);
-				}
-
-				// The first 1kb doesn't page though, if this is the Sega paging scheme.
-				if(paging_scheme_ == Target::PagingScheme::Sega) {
-					map(read_pointers_, cartridge_.data(), 0x400, 0x0000);
-				}
-			} else {
-				map(read_pointers_, nullptr, 0xc000, 0x0000);
 			}
 
-			// Throw the BIOS on top if this machine has one and it isn't disabled.
+			// The first 1kb doesn't page though, if this is the Sega paging scheme.
-			if(has_bios_ && !(memory_control_ & 0x08)) {
+			if(paging_scheme_ == Target::PagingScheme::Sega) {
-				map(read_pointers_, bios_, 8*1024, 0);
+				map(read_pointers_, cartridge_.data(), 0x400, 0x0000);
 			}
+		} else {
+			map(read_pointers_, nullptr, 0xc000, 0x0000);
 		}
-		bool has_bios_ = true;
+
+		// Throw the BIOS on top if this machine has one and it isn't disabled.
+		if(has_bios_ && !(memory_control_ & 0x08)) {
+			map(read_pointers_, bios_, 8*1024, 0);
+		}
+	}
+	bool has_bios_ = true;
 };
 
 }

Machines/Oric/BD500.hpp

@@ -23,33 +23,33 @@ namespace Oric {
 	see the thread at https://forum.defence-force.org/viewtopic.php?f=25&t=2055
 */
 class BD500: public DiskController {
-	public:
+public:
-		BD500();
+	BD500();
 
-		void write(int address, uint8_t value);
+	void write(int address, uint8_t value);
-		uint8_t read(int address);
+	uint8_t read(int address);
 
-		void run_for(const Cycles cycles);
+	void run_for(const Cycles cycles);
 
-		void set_activity_observer(Activity::Observer *observer);
+	void set_activity_observer(Activity::Observer *observer);
 
-	private:
+private:
-		void set_head_load_request(bool head_load) final;
+	void set_head_load_request(bool head_load) final;
-		bool is_loading_head_ = false;
+	bool is_loading_head_ = false;
-		Activity::Observer *observer_ = nullptr;
+	Activity::Observer *observer_ = nullptr;
 
-		void access(int address);
+	void access(int address);
-		void set_head_loaded(bool loaded);
+	void set_head_loaded(bool loaded);
 
-		bool enable_overlay_ram_ = false;
+	bool enable_overlay_ram_ = false;
-		bool disable_basic_rom_ = false;
+	bool disable_basic_rom_ = false;
-		void select_paged_item() {
+	void select_paged_item() {
-			PagedItem item = PagedItem::RAM;
+		PagedItem item = PagedItem::RAM;
-			if(!enable_overlay_ram_) {
+		if(!enable_overlay_ram_) {
-				item = disable_basic_rom_ ? PagedItem::DiskROM : PagedItem::BASIC;
+			item = disable_basic_rom_ ? PagedItem::DiskROM : PagedItem::BASIC;
-			}
-			set_paged_item(item);
 		}
+		set_paged_item(item);
+	}
 };
 
 }

Machines/Oric/DiskController.hpp

@@ -11,50 +11,50 @@
 namespace Oric {
 
 class DiskController: public WD::WD1770 {
-	public:
+public:
-		DiskController(WD::WD1770::Personality personality, int clock_rate, Storage::Disk::Drive::ReadyType ready_type) :
+	DiskController(WD::WD1770::Personality personality, int clock_rate, Storage::Disk::Drive::ReadyType ready_type) :
-			WD::WD1770(personality), clock_rate_(clock_rate), ready_type_(ready_type) {
+		WD::WD1770(personality), clock_rate_(clock_rate), ready_type_(ready_type) {
-			emplace_drives(4, clock_rate_, 300, 2, ready_type_);
+		emplace_drives(4, clock_rate_, 300, 2, ready_type_);
-			// TODO: don't assume four drives?
+		// TODO: don't assume four drives?
+	}
+
+	void set_disk(std::shared_ptr<Storage::Disk::Disk> disk, int d) {
+		get_drive(size_t(d)).set_disk(disk);
+	}
+
+	enum class PagedItem {
+		DiskROM,
+		BASIC,
+		RAM
+	};
+
+	struct Delegate: public WD1770::Delegate {
+		virtual void disk_controller_did_change_paged_item(DiskController &) = 0;
+	};
+	inline void set_delegate(Delegate *delegate)	{
+		delegate_ = delegate;
+		WD1770::set_delegate(delegate);
+		if(delegate) delegate->disk_controller_did_change_paged_item(*this);
+	}
+	inline PagedItem get_paged_item() {
+		return paged_item_;
+	}
+
+protected:
+	Delegate *delegate_ = nullptr;
+
+	void set_paged_item(PagedItem item) {
+		if(paged_item_ == item) return;
+		paged_item_ = item;
+		if(delegate_) {
+			delegate_->disk_controller_did_change_paged_item(*this);
 		}
+	}
 
-		void set_disk(std::shared_ptr<Storage::Disk::Disk> disk, int d) {
+private:
-			get_drive(size_t(d)).set_disk(disk);
+	PagedItem paged_item_ = PagedItem::DiskROM;
-		}
+	int clock_rate_;
-
+	Storage::Disk::Drive::ReadyType ready_type_;
-		enum class PagedItem {
-			DiskROM,
-			BASIC,
-			RAM
-		};
-
-		struct Delegate: public WD1770::Delegate {
-			virtual void disk_controller_did_change_paged_item(DiskController &) = 0;
-		};
-		inline void set_delegate(Delegate *delegate)	{
-			delegate_ = delegate;
-			WD1770::set_delegate(delegate);
-			if(delegate) delegate->disk_controller_did_change_paged_item(*this);
-		}
-		inline PagedItem get_paged_item() {
-			return paged_item_;
-		}
-
-	protected:
-		Delegate *delegate_ = nullptr;
-
-		void set_paged_item(PagedItem item) {
-			if(paged_item_ == item) return;
-			paged_item_ = item;
-			if(delegate_) {
-				delegate_->disk_controller_did_change_paged_item(*this);
-			}
-		}
-
-	private:
-		PagedItem paged_item_ = PagedItem::DiskROM;
-		int clock_rate_;
-		Storage::Disk::Drive::ReadyType ready_type_;
 };
 
 }

Machines/Oric/Jasmin.hpp

@@ -15,29 +15,29 @@
 namespace Oric {
 
 class Jasmin: public DiskController {
-	public:
+public:
-		Jasmin();
+	Jasmin();
 
-		void write(int address, uint8_t value);
+	void write(int address, uint8_t value);
 
-		void set_activity_observer(Activity::Observer *observer);
+	void set_activity_observer(Activity::Observer *observer);
 
-	private:
+private:
-		void set_motor_on(bool on) final;
+	void set_motor_on(bool on) final;
-		bool motor_on_ = false;
+	bool motor_on_ = false;
-		uint8_t selected_drives_ = 0;
+	uint8_t selected_drives_ = 0;
 
-		Activity::Observer *observer_ = nullptr;
+	Activity::Observer *observer_ = nullptr;
 
-		bool enable_overlay_ram_ = false;
+	bool enable_overlay_ram_ = false;
-		bool disable_basic_rom_ = false;
+	bool disable_basic_rom_ = false;
-		void select_paged_item() {
+	void select_paged_item() {
-			PagedItem item = PagedItem::RAM;
+		PagedItem item = PagedItem::RAM;
-			if(!enable_overlay_ram_) {
+		if(!enable_overlay_ram_) {
-				item = disable_basic_rom_ ? PagedItem::DiskROM : PagedItem::BASIC;
+			item = disable_basic_rom_ ? PagedItem::DiskROM : PagedItem::BASIC;
-			}
-			set_paged_item(item);
 		}
+		set_paged_item(item);
+	}
 };
 
 }

Machines/Oric/Microdisc.hpp

@@ -15,30 +15,30 @@
 namespace Oric {
 
 class Microdisc: public DiskController {
-	public:
+public:
-		Microdisc();
+	Microdisc();
 
-		void set_control_register(uint8_t control);
+	void set_control_register(uint8_t control);
-		uint8_t get_interrupt_request_register();
+	uint8_t get_interrupt_request_register();
-		uint8_t get_data_request_register();
+	uint8_t get_data_request_register();
 
-		bool get_interrupt_request_line();
+	bool get_interrupt_request_line();
 
-		void run_for(const Cycles cycles);
+	void run_for(const Cycles cycles);
 
-		void set_activity_observer(Activity::Observer *observer);
+	void set_activity_observer(Activity::Observer *observer);
 
-	private:
+private:
-		void set_head_load_request(bool head_load) final;
+	void set_head_load_request(bool head_load) final;
 
-		void set_control_register(uint8_t control, uint8_t changes);
+	void set_control_register(uint8_t control, uint8_t changes);
-		uint8_t last_control_ = 0;
+	uint8_t last_control_ = 0;
-		bool irq_enable_ = false;
+	bool irq_enable_ = false;
 
-		Cycles::IntType head_load_request_counter_ = -1;
+	Cycles::IntType head_load_request_counter_ = -1;
-		bool head_load_request_ = false;
+	bool head_load_request_ = false;
 
-		Activity::Observer *observer_ = nullptr;
+	Activity::Observer *observer_ = nullptr;
 };
 
 }

Machines/Oric/Video.hpp

@@ -18,52 +18,52 @@
 namespace Oric {
 
 class VideoOutput {
-	public:
+public:
-		VideoOutput(uint8_t *memory);
+	VideoOutput(uint8_t *memory);
-		void set_colour_rom(const std::vector<uint8_t> &colour_rom);
+	void set_colour_rom(const std::vector<uint8_t> &colour_rom);
 
-		void run_for(const Cycles cycles);
+	void run_for(const Cycles cycles);
-		Cycles next_sequence_point() const;
+	Cycles next_sequence_point() const;
 
-		bool vsync();
+	bool vsync();
 
-		void set_scan_target(Outputs::Display::ScanTarget *scan_target);
+	void set_scan_target(Outputs::Display::ScanTarget *scan_target);
-		void set_display_type(Outputs::Display::DisplayType display_type);
+	void set_display_type(Outputs::Display::DisplayType display_type);
-		Outputs::Display::DisplayType get_display_type() const;
+	Outputs::Display::DisplayType get_display_type() const;
-		Outputs::Display::ScanStatus get_scaled_scan_status() const;
+	Outputs::Display::ScanStatus get_scaled_scan_status() const;
 
-		void register_crt_frequency_mismatch();
+	void register_crt_frequency_mismatch();
 
-	private:
+private:
-		uint8_t *ram_;
+	uint8_t *ram_;
-		Outputs::CRT::CRT crt_;
+	Outputs::CRT::CRT crt_;
-		Outputs::CRT::CRTFrequencyMismatchWarner<VideoOutput> frequency_mismatch_warner_;
+	Outputs::CRT::CRTFrequencyMismatchWarner<VideoOutput> frequency_mismatch_warner_;
-		bool crt_is_60Hz_ = false;
+	bool crt_is_60Hz_ = false;
-		bool has_colour_rom_ = false;
+	bool has_colour_rom_ = false;
 
-		void update_crt_frequency();
+	void update_crt_frequency();
 
-		// Counters and limits.
+	// Counters and limits.
-		int counter_ = 0, frame_counter_ = 0;
+	int counter_ = 0, frame_counter_ = 0;
-		int v_sync_start_position_, v_sync_end_position_, counter_period_;
+	int v_sync_start_position_, v_sync_end_position_, counter_period_;
 
-		// Output target and device.
+	// Output target and device.
-		uint8_t *rgb_pixel_target_ = nullptr;
+	uint8_t *rgb_pixel_target_ = nullptr;
-		uint32_t *composite_pixel_target_ = nullptr;
+	uint32_t *composite_pixel_target_ = nullptr;
-		uint32_t colour_forms_[8];
+	uint32_t colour_forms_[8];
-		Outputs::Display::InputDataType data_type_;
+	Outputs::Display::InputDataType data_type_;
 
-		// Registers.
+	// Registers.
-		uint8_t ink_, paper_;
+	uint8_t ink_, paper_;
 
-		int character_set_base_address_ = 0xb400;
+	int character_set_base_address_ = 0xb400;
-		inline void set_character_set_base_address();
+	inline void set_character_set_base_address();
 
-		bool is_graphics_mode_ = false;
+	bool is_graphics_mode_ = false;
-		bool next_frame_is_sixty_hertz_ = false;
+	bool next_frame_is_sixty_hertz_ = false;
-		bool use_alternative_character_set_;
+	bool use_alternative_character_set_;
-		bool use_double_height_characters_;
+	bool use_double_height_characters_;
-		bool blink_text_;
+	bool blink_text_;
 };
 
 }

Machines/Sinclair/Keyboard/Keyboard.hpp

@@ -37,38 +37,38 @@ enum Key: uint16_t {
 };
 
 class Keyboard {
-	public:
+public:
-		Keyboard(Machine machine);
+	Keyboard(Machine machine);
 
-		void set_key_state(uint16_t key, bool is_pressed);
+	void set_key_state(uint16_t key, bool is_pressed);
-		void clear_all_keys();
+	void clear_all_keys();
 
-		uint8_t read(uint16_t address);
+	uint8_t read(uint16_t address);
 
-	private:
+private:
-		uint8_t key_states_[8];
+	uint8_t key_states_[8];
-		const Machine machine_;
+	const Machine machine_;
 };
 
 class KeyboardMapper: public MachineTypes::MappedKeyboardMachine::KeyboardMapper {
-	public:
+public:
-		KeyboardMapper(Machine machine);
+	KeyboardMapper(Machine machine);
 
-		uint16_t mapped_key_for_key(Inputs::Keyboard::Key key) const override;
+	uint16_t mapped_key_for_key(Inputs::Keyboard::Key key) const override;
 
-	private:
+private:
-		const Machine machine_;
+	const Machine machine_;
 };
 
 class CharacterMapper: public ::Utility::CharacterMapper {
-	public:
+public:
-		CharacterMapper(Machine machine);
+	CharacterMapper(Machine machine);
-		const uint16_t *sequence_for_character(char character) const override;
+	const uint16_t *sequence_for_character(char character) const override;
 
-		bool needs_pause_after_key(uint16_t key) const override;
+	bool needs_pause_after_key(uint16_t key) const override;
 
-	private:
+private:
-		const Machine machine_;
+	const Machine machine_;
 };
 
 }

Machines/Sinclair/ZX8081/Video.hpp

@@ -24,36 +24,36 @@ namespace Sinclair::ZX8081 {
 	and the black level.
 */
 class Video {
-	public:
+public:
-		/// Constructs an instance of the video feed.
+	/// Constructs an instance of the video feed.
-		Video();
+	Video();
 
-		/// Advances time by @c half-cycles.
+	/// Advances time by @c half-cycles.
-		void run_for(const HalfCycles);
+	void run_for(const HalfCycles);
 
-		/// Forces output to catch up to the current output position.
+	/// Forces output to catch up to the current output position.
-		void flush();
+	void flush();
 
-		/// Sets the current sync output.
+	/// Sets the current sync output.
-		void set_sync(bool sync);
+	void set_sync(bool sync);
 
-		/// Causes @c byte to be serialised into pixels and output over the next four cycles.
+	/// Causes @c byte to be serialised into pixels and output over the next four cycles.
-		void output_byte(uint8_t byte);
+	void output_byte(uint8_t byte);
 
-		/// Sets the scan target.
+	/// Sets the scan target.
-		void set_scan_target(Outputs::Display::ScanTarget *scan_target);
+	void set_scan_target(Outputs::Display::ScanTarget *scan_target);
 
-		/// Gets the current scan status.
+	/// Gets the current scan status.
-		Outputs::Display::ScanStatus get_scaled_scan_status() const;
+	Outputs::Display::ScanStatus get_scaled_scan_status() const;
 
-	private:
+private:
-		bool sync_ = false;
+	bool sync_ = false;
-		uint8_t *line_data_ = nullptr;
+	uint8_t *line_data_ = nullptr;
-		uint8_t *line_data_pointer_ = nullptr;
+	uint8_t *line_data_pointer_ = nullptr;
-		HalfCycles time_since_update_ = 0;
+	HalfCycles time_since_update_ = 0;
-		Outputs::CRT::CRT crt_;
+	Outputs::CRT::CRT crt_;
 
-		void flush(bool next_sync);
+	void flush(bool next_sync);
 };
 
 }

Machines/Sinclair/ZX8081/ZX8081.cpp

@@ -61,433 +61,433 @@ template<bool is_zx81> class ConcreteMachine:
 	public Utility::TypeRecipient<CharacterMapper>,
 	public CPU::Z80::BusHandler,
 	public Machine {
-	public:
+public:
-		ConcreteMachine(const Analyser::Static::ZX8081::Target &target, const ROMMachine::ROMFetcher &rom_fetcher) :
+	ConcreteMachine(const Analyser::Static::ZX8081::Target &target, const ROMMachine::ROMFetcher &rom_fetcher) :
-			Utility::TypeRecipient<CharacterMapper>(keyboard_machine()),
+		Utility::TypeRecipient<CharacterMapper>(keyboard_machine()),
-			z80_(*this),
+		z80_(*this),
-			keyboard_(keyboard_machine()),
+		keyboard_(keyboard_machine()),
-			keyboard_mapper_(keyboard_machine()),
+		keyboard_mapper_(keyboard_machine()),
-			tape_player_(ZX8081ClockRate),
+		tape_player_(ZX8081ClockRate),
-			ay_(GI::AY38910::Personality::AY38910, audio_queue_),
+		ay_(GI::AY38910::Personality::AY38910, audio_queue_),
-			speaker_(ay_) {
+		speaker_(ay_) {
-			set_clock_rate(ZX8081ClockRate);
+		set_clock_rate(ZX8081ClockRate);
-			speaker_.set_input_rate(float(ZX8081ClockRate) / 2.0f);
+		speaker_.set_input_rate(float(ZX8081ClockRate) / 2.0f);
 
-			const bool use_zx81_rom = target.is_ZX81 || target.ZX80_uses_ZX81_ROM;
+		const bool use_zx81_rom = target.is_ZX81 || target.ZX80_uses_ZX81_ROM;
-			const ROM::Name rom_name = use_zx81_rom ? ROM::Name::ZX81 : ROM::Name::ZX80;
+		const ROM::Name rom_name = use_zx81_rom ? ROM::Name::ZX81 : ROM::Name::ZX80;
-			const ROM::Request request(rom_name);
+		const ROM::Request request(rom_name);
-			auto roms = rom_fetcher(request);
+		auto roms = rom_fetcher(request);
-			if(!request.validate(roms)) {
+		if(!request.validate(roms)) {
-				throw ROMMachine::Error::MissingROMs;
+			throw ROMMachine::Error::MissingROMs;
-			}
+		}
-			rom_ = std::move(roms.find(rom_name)->second);
+		rom_ = std::move(roms.find(rom_name)->second);
 
-			rom_mask_ = uint16_t(rom_.size() - 1);
+		rom_mask_ = uint16_t(rom_.size() - 1);
 
-			switch(target.memory_model) {
+		switch(target.memory_model) {
-				case Analyser::Static::ZX8081::Target::MemoryModel::Unexpanded:
+			case Analyser::Static::ZX8081::Target::MemoryModel::Unexpanded:
-					ram_.resize(1024);
+				ram_.resize(1024);
-					ram_base_ = 16384;
+				ram_base_ = 16384;
-					ram_mask_ = 1023;
+				ram_mask_ = 1023;
-				break;
+			break;
-				case Analyser::Static::ZX8081::Target::MemoryModel::SixteenKB:
+			case Analyser::Static::ZX8081::Target::MemoryModel::SixteenKB:
-					ram_.resize(16384);
+				ram_.resize(16384);
-					ram_base_ = 16384;
+				ram_base_ = 16384;
-					ram_mask_ = 16383;
+				ram_mask_ = 16383;
-				break;
+			break;
-				case Analyser::Static::ZX8081::Target::MemoryModel::SixtyFourKB:
+			case Analyser::Static::ZX8081::Target::MemoryModel::SixtyFourKB:
-					ram_.resize(65536);
+				ram_.resize(65536);
-					ram_base_ = 8192;
+				ram_base_ = 8192;
-					ram_mask_ = 65535;
+				ram_mask_ = 65535;
-				break;
+			break;
-			}
+		}
-			Memory::Fuzz(ram_);
+		Memory::Fuzz(ram_);
 
-			// Ensure valid initial key state.
+		// Ensure valid initial key state.
-			clear_all_keys();
+		clear_all_keys();
-			if(!target.loading_command.empty()) {
+		if(!target.loading_command.empty()) {
-				type_string(target.loading_command);
+			type_string(target.loading_command);
-				should_autorun_ = true;
+			should_autorun_ = true;
-			}
-
-			insert_media(target.media);
 		}
 
-		~ConcreteMachine() {
+		insert_media(target.media);
-			audio_queue_.flush();
+	}
+
+	~ConcreteMachine() {
+		audio_queue_.flush();
+	}
+
+	forceinline HalfCycles perform_machine_cycle(const CPU::Z80::PartialMachineCycle &cycle) {
+		const HalfCycles previous_counter = horizontal_counter_;
+		horizontal_counter_ += cycle.length;
+		time_since_ay_update_ += cycle.length;
+
+		if(previous_counter < vsync_start_ && horizontal_counter_ >= vsync_start_) {
+			video_.run_for(vsync_start_ - previous_counter);
+			set_hsync(true);
+			line_counter_ = (line_counter_ + 1) & 7;
+			if(nmi_is_enabled_) {
+				z80_.set_non_maskable_interrupt_line(true);
+			}
+			video_.run_for(horizontal_counter_ - vsync_start_);
+		} else if(previous_counter < vsync_end_ && horizontal_counter_ >= vsync_end_) {
+			video_.run_for(vsync_end_ - previous_counter);
+			set_hsync(false);
+			if(nmi_is_enabled_) {
+				z80_.set_non_maskable_interrupt_line(false);
+				z80_.set_wait_line(false);
+			}
+			video_.run_for(horizontal_counter_ - vsync_end_);
+		} else {
+			video_.run_for(cycle.length);
 		}
 
-		forceinline HalfCycles perform_machine_cycle(const CPU::Z80::PartialMachineCycle &cycle) {
+		if constexpr (is_zx81) horizontal_counter_ %= HalfCycles(Cycles(207));
-			const HalfCycles previous_counter = horizontal_counter_;
+		if(!tape_advance_delay_) {
-			horizontal_counter_ += cycle.length;
+			tape_player_.run_for(cycle.length);
-			time_since_ay_update_ += cycle.length;
+		} else {
+			tape_advance_delay_ = std::max(tape_advance_delay_ - cycle.length, HalfCycles(0));
+		}
 
-			if(previous_counter < vsync_start_ && horizontal_counter_ >= vsync_start_) {
+		if(nmi_is_enabled_ && !z80_.get_halt_line() && z80_.get_non_maskable_interrupt_line()) {
-				video_.run_for(vsync_start_ - previous_counter);
+			z80_.set_wait_line(true);
-				set_hsync(true);
+		}
-				line_counter_ = (line_counter_ + 1) & 7;
+
-				if(nmi_is_enabled_) {
+		if(!cycle.is_terminal()) {
-					z80_.set_non_maskable_interrupt_line(true);
+			return Cycles(0);
+		}
+
+		const uint16_t address = cycle.address ? *cycle.address : 0;
+		bool is_opcode_read = false;
+		switch(cycle.operation) {
+			case CPU::Z80::PartialMachineCycle::Output:
+				if(!nmi_is_enabled_) {
+					line_counter_ = 0;
+					set_vsync(false);
 				}
-				video_.run_for(horizontal_counter_ - vsync_start_);
+				if(!(address & 2)) nmi_is_enabled_ = false;
-			} else if(previous_counter < vsync_end_ && horizontal_counter_ >= vsync_end_) {
+				if(!(address & 1)) nmi_is_enabled_ = is_zx81;
-				video_.run_for(vsync_end_ - previous_counter);
+				if(is_zx81 && !nmi_is_enabled_) z80_.set_wait_line(false);
-				set_hsync(false);
+
-				if(nmi_is_enabled_) {
+				// The below emulates the ZonX AY expansion device.
-					z80_.set_non_maskable_interrupt_line(false);
+				if constexpr (is_zx81) {
-					z80_.set_wait_line(false);
+					if((address&0xef) == 0xcf) {
+						ay_set_register(*cycle.value);
+					} else if((address&0xef) == 0x0f) {
+						ay_set_data(*cycle.value);
+					}
 				}
-				video_.run_for(horizontal_counter_ - vsync_end_);
+			break;
-			} else {
-				video_.run_for(cycle.length);
-			}
 
-			if constexpr (is_zx81) horizontal_counter_ %= HalfCycles(Cycles(207));
+			case CPU::Z80::PartialMachineCycle::Input: {
-			if(!tape_advance_delay_) {
+				uint8_t value = 0xff;
-				tape_player_.run_for(cycle.length);
+				if(!(address&1)) {
-			} else {
+					if(!nmi_is_enabled_) set_vsync(true);
-				tape_advance_delay_ = std::max(tape_advance_delay_ - cycle.length, HalfCycles(0));
-			}
 
-			if(nmi_is_enabled_ && !z80_.get_halt_line() && z80_.get_non_maskable_interrupt_line()) {
+					value &= keyboard_.read(address);
-				z80_.set_wait_line(true);
+					value &= ~(tape_player_.input() ? 0x00 : 0x80);
-			}
+				}
 
-			if(!cycle.is_terminal()) {
+				// The below emulates the ZonX AY expansion device.
-				return Cycles(0);
+				if constexpr (is_zx81) {
-			}
+					if((address&0xef) == 0xcf) {
-
+						value &= ay_read_data();
-			const uint16_t address = cycle.address ? *cycle.address : 0;
-			bool is_opcode_read = false;
-			switch(cycle.operation) {
-				case CPU::Z80::PartialMachineCycle::Output:
-					if(!nmi_is_enabled_) {
-						line_counter_ = 0;
-						set_vsync(false);
 					}
-					if(!(address & 2)) nmi_is_enabled_ = false;
+				}
-					if(!(address & 1)) nmi_is_enabled_ = is_zx81;
+				*cycle.value = value;
-					if(is_zx81 && !nmi_is_enabled_) z80_.set_wait_line(false);
+			} break;
 
-					// The below emulates the ZonX AY expansion device.
+			case CPU::Z80::PartialMachineCycle::Interrupt:
-					if constexpr (is_zx81) {
+				// resetting event is M1 and IOREQ both simultaneously having leading edges;
-						if((address&0xef) == 0xcf) {
+				// that happens 2 cycles before the end of INTACK. So the timer was reset and
-							ay_set_register(*cycle.value);
+				// now has advanced twice.
-						} else if((address&0xef) == 0x0f) {
+				horizontal_counter_ = HalfCycles(2);
-							ay_set_data(*cycle.value);
-						}
-					}
-				break;
 
-				case CPU::Z80::PartialMachineCycle::Input: {
+				*cycle.value = 0xff;
-					uint8_t value = 0xff;
+			break;
-					if(!(address&1)) {
-						if(!nmi_is_enabled_) set_vsync(true);
 
-						value &= keyboard_.read(address);
+			case CPU::Z80::PartialMachineCycle::Refresh:
-						value &= ~(tape_player_.input() ? 0x00 : 0x80);
+				// The ZX80 and 81 signal an interrupt while refresh is active and bit 6 of the refresh
-					}
+				// address is low. The Z80 signals a refresh, providing the refresh address during the
-
+				// final two cycles of an opcode fetch. Therefore communicate a transient signalling
-					// The below emulates the ZonX AY expansion device.
+				// of the IRQ line if necessary.
-					if constexpr (is_zx81) {
+				if(!(address & 0x40)) {
-						if((address&0xef) == 0xcf) {
+					z80_.set_interrupt_line(true, Cycles(-2));
-							value &= ay_read_data();
+					z80_.set_interrupt_line(false);
-						}
+				}
-					}
+				if(has_latched_video_byte_) {
-					*cycle.value = value;
+					std::size_t char_address = size_t((address & 0xfe00) | ((latched_video_byte_ & 0x3f) << 3) | line_counter_);
-				} break;
+					const uint8_t mask = (latched_video_byte_ & 0x80) ? 0x00 : 0xff;
-
+					if(char_address < ram_base_) {
-				case CPU::Z80::PartialMachineCycle::Interrupt:
+						latched_video_byte_ = rom_[char_address & rom_mask_] ^ mask;
-					// resetting event is M1 and IOREQ both simultaneously having leading edges;
-					// that happens 2 cycles before the end of INTACK. So the timer was reset and
-					// now has advanced twice.
-					horizontal_counter_ = HalfCycles(2);
-
-					*cycle.value = 0xff;
-				break;
-
-				case CPU::Z80::PartialMachineCycle::Refresh:
-					// The ZX80 and 81 signal an interrupt while refresh is active and bit 6 of the refresh
-					// address is low. The Z80 signals a refresh, providing the refresh address during the
-					// final two cycles of an opcode fetch. Therefore communicate a transient signalling
-					// of the IRQ line if necessary.
-					if(!(address & 0x40)) {
-						z80_.set_interrupt_line(true, Cycles(-2));
-						z80_.set_interrupt_line(false);
-					}
-					if(has_latched_video_byte_) {
-						std::size_t char_address = size_t((address & 0xfe00) | ((latched_video_byte_ & 0x3f) << 3) | line_counter_);
-						const uint8_t mask = (latched_video_byte_ & 0x80) ? 0x00 : 0xff;
-						if(char_address < ram_base_) {
-							latched_video_byte_ = rom_[char_address & rom_mask_] ^ mask;
-						} else {
-							latched_video_byte_ = ram_[address & ram_mask_] ^ mask;
-						}
-
-						video_.output_byte(latched_video_byte_);
-						has_latched_video_byte_ = false;
-					}
-				break;
-
-				case CPU::Z80::PartialMachineCycle::ReadOpcode:
-					// Check for use of the fast tape hack.
-					if(use_fast_tape_hack_ && address == tape_trap_address_) {
-						const uint64_t prior_offset = tape_player_.serialiser()->offset();
-						const int next_byte = parser_.get_next_byte(*tape_player_.serialiser());
-						if(next_byte != -1) {
-							const uint16_t hl = z80_.value_of(CPU::Z80::Register::HL);
-							ram_[hl & ram_mask_] = uint8_t(next_byte);
-							*cycle.value = 0x00;
-							z80_.set_value_of(CPU::Z80::Register::ProgramCounter, tape_return_address_ - 1);
-
-							// Assume that having read one byte quickly, we're probably going to be asked to read
-							// another shortly. Therefore, temporarily disable the tape motor for 1000 cycles in order
-							// to avoid fighting with real time. This is a stop-gap fix.
-							tape_advance_delay_ = 1000;
-							return 0;
-						} else {
-							tape_player_.serialiser()->set_offset(prior_offset);
-						}
-					}
-
-					if(should_autorun_ && address == finished_load_address_) {
-						type_string(is_zx81 ? "r \n" : "r\n ");	// Spaces here are not especially scientific; they merely ensure sufficient pauses for both the ZX80 and 81, empirically.
-						should_autorun_ = false;
-					}
-
-					// Check for automatic tape control.
-					if(use_automatic_tape_motor_control_) {
-						tape_player_.set_motor_control((address >= automatic_tape_motor_start_address_) && (address < automatic_tape_motor_end_address_));
-					}
-					is_opcode_read = true;
-					[[fallthrough]];
-
-				case CPU::Z80::PartialMachineCycle::Read:
-					if(address < ram_base_) {
-						*cycle.value = rom_[address & rom_mask_];
 					} else {
-						const uint8_t value = ram_[address & ram_mask_];
+						latched_video_byte_ = ram_[address & ram_mask_] ^ mask;
-
-						// If this is an M1 cycle reading from above the 32kb mark and HALT is not
-						// currently active, latch for video output and return a NOP. Otherwise,
-						// just return the value as read.
-						if(is_opcode_read && address&0x8000 && !(value & 0x40) && !z80_.get_halt_line()) {
-							latched_video_byte_ = value;
-							has_latched_video_byte_ = true;
-							*cycle.value = 0;
-						} else *cycle.value = value;
 					}
-				break;
 
-				case CPU::Z80::PartialMachineCycle::Write:
+					video_.output_byte(latched_video_byte_);
-					if(address >= ram_base_) {
+					has_latched_video_byte_ = false;
-						ram_[address & ram_mask_] = *cycle.value;
-					}
-				break;
-
-				default: break;
-			}
-
-			if(typer_) typer_->run_for(cycle.length);
-			return HalfCycles(0);
-		}
-
-		void flush_output(int outputs) final {
-			if(outputs & Output::Video) {
-				video_.flush();
-			}
-
-			if constexpr (is_zx81) {
-				if(outputs & Output::Audio) {
-					update_audio();
-					audio_queue_.perform();
 				}
+			break;
+
+			case CPU::Z80::PartialMachineCycle::ReadOpcode:
+				// Check for use of the fast tape hack.
+				if(use_fast_tape_hack_ && address == tape_trap_address_) {
+					const uint64_t prior_offset = tape_player_.serialiser()->offset();
+					const int next_byte = parser_.get_next_byte(*tape_player_.serialiser());
+					if(next_byte != -1) {
+						const uint16_t hl = z80_.value_of(CPU::Z80::Register::HL);
+						ram_[hl & ram_mask_] = uint8_t(next_byte);
+						*cycle.value = 0x00;
+						z80_.set_value_of(CPU::Z80::Register::ProgramCounter, tape_return_address_ - 1);
+
+						// Assume that having read one byte quickly, we're probably going to be asked to read
+						// another shortly. Therefore, temporarily disable the tape motor for 1000 cycles in order
+						// to avoid fighting with real time. This is a stop-gap fix.
+						tape_advance_delay_ = 1000;
+						return 0;
+					} else {
+						tape_player_.serialiser()->set_offset(prior_offset);
+					}
+				}
+
+				if(should_autorun_ && address == finished_load_address_) {
+					type_string(is_zx81 ? "r \n" : "r\n ");	// Spaces here are not especially scientific; they merely ensure sufficient pauses for both the ZX80 and 81, empirically.
+					should_autorun_ = false;
+				}
+
+				// Check for automatic tape control.
+				if(use_automatic_tape_motor_control_) {
+					tape_player_.set_motor_control((address >= automatic_tape_motor_start_address_) && (address < automatic_tape_motor_end_address_));
+				}
+				is_opcode_read = true;
+				[[fallthrough]];
+
+			case CPU::Z80::PartialMachineCycle::Read:
+				if(address < ram_base_) {
+					*cycle.value = rom_[address & rom_mask_];
+				} else {
+					const uint8_t value = ram_[address & ram_mask_];
+
+					// If this is an M1 cycle reading from above the 32kb mark and HALT is not
+					// currently active, latch for video output and return a NOP. Otherwise,
+					// just return the value as read.
+					if(is_opcode_read && address&0x8000 && !(value & 0x40) && !z80_.get_halt_line()) {
+						latched_video_byte_ = value;
+						has_latched_video_byte_ = true;
+						*cycle.value = 0;
+					} else *cycle.value = value;
+				}
+			break;
+
+			case CPU::Z80::PartialMachineCycle::Write:
+				if(address >= ram_base_) {
+					ram_[address & ram_mask_] = *cycle.value;
+				}
+			break;
+
+			default: break;
+		}
+
+		if(typer_) typer_->run_for(cycle.length);
+		return HalfCycles(0);
+	}
+
+	void flush_output(int outputs) final {
+		if(outputs & Output::Video) {
+			video_.flush();
+		}
+
+		if constexpr (is_zx81) {
+			if(outputs & Output::Audio) {
+				update_audio();
+				audio_queue_.perform();
 			}
 		}
+	}
 
-		void set_scan_target(Outputs::Display::ScanTarget *scan_target) final {
+	void set_scan_target(Outputs::Display::ScanTarget *scan_target) final {
-			video_.set_scan_target(scan_target);
+		video_.set_scan_target(scan_target);
+	}
+
+	Outputs::Display::ScanStatus get_scaled_scan_status() const final {
+		return video_.get_scaled_scan_status();
+	}
+
+	Outputs::Speaker::Speaker *get_speaker() final {
+		return is_zx81 ? &speaker_ : nullptr;
+	}
+
+	void run_for(const Cycles cycles) final {
+		z80_.run_for(cycles);
+	}
+
+	bool insert_media(const Analyser::Static::Media &media) final {
+		if(!media.tapes.empty()) {
+			tape_player_.set_tape(media.tapes.front(), is_zx81 ? TargetPlatform::ZX81 : TargetPlatform::ZX80);
 		}
 
-		Outputs::Display::ScanStatus get_scaled_scan_status() const final {
+		set_use_fast_tape();
-			return video_.get_scaled_scan_status();
+		return !media.tapes.empty();
+	}
+
+	void type_string(const std::string &string) final {
+		Utility::TypeRecipient<CharacterMapper>::add_typer(string);
+	}
+
+	bool can_type(char c) const final {
+		return Utility::TypeRecipient<CharacterMapper>::can_type(c);
+	}
+
+	// MARK: - Keyboard
+	void set_key_state(uint16_t key, bool is_pressed) final {
+		keyboard_.set_key_state(key, is_pressed);
+	}
+
+	void clear_all_keys() final {
+		keyboard_.clear_all_keys();
+	}
+
+	static constexpr Sinclair::ZX::Keyboard::Machine keyboard_machine() {
+		return is_zx81 ? Sinclair::ZX::Keyboard::Machine::ZX81 : Sinclair::ZX::Keyboard::Machine::ZX80;
+	}
+
+	// MARK: - Tape control
+
+	void set_use_automatic_tape_motor_control(bool enabled) {
+		use_automatic_tape_motor_control_ = enabled;
+		if(!enabled) {
+			tape_player_.set_motor_control(false);
 		}
+	}
 
-		Outputs::Speaker::Speaker *get_speaker() final {
+	void set_tape_is_playing(bool is_playing) final {
-			return is_zx81 ? &speaker_ : nullptr;
+		tape_player_.set_motor_control(is_playing);
-		}
+	}
 
-		void run_for(const Cycles cycles) final {
+	bool get_tape_is_playing() final {
-			z80_.run_for(cycles);
+		return tape_player_.motor_control();
-		}
+	}
 
-		bool insert_media(const Analyser::Static::Media &media) final {
+	// MARK: - Typer timing
-			if(!media.tapes.empty()) {
+	HalfCycles get_typer_delay(const std::string &) const final {
-				tape_player_.set_tape(media.tapes.front(), is_zx81 ? TargetPlatform::ZX81 : TargetPlatform::ZX80);
+		return z80_.get_is_resetting() ? Cycles(7'000'000) : Cycles(0);
-			}
+	}
 
-			set_use_fast_tape();
+	HalfCycles get_typer_frequency() const final {
-			return !media.tapes.empty();
+		return Cycles(159'961);
-		}
+	}
 
-		void type_string(const std::string &string) final {
+	KeyboardMapper *get_keyboard_mapper() final {
-			Utility::TypeRecipient<CharacterMapper>::add_typer(string);
+		return &keyboard_mapper_;
-		}
+	}
 
-		bool can_type(char c) const final {
+	// MARK: - Configuration options.
-			return Utility::TypeRecipient<CharacterMapper>::can_type(c);
-		}
 
-		// MARK: - Keyboard
+	std::unique_ptr<Reflection::Struct> get_options() const final {
-		void set_key_state(uint16_t key, bool is_pressed) final {
+		auto options = std::make_unique<Options>(Configurable::OptionsType::UserFriendly);	// OptionsType is arbitrary, but not optional.
-			keyboard_.set_key_state(key, is_pressed);
+		options->automatic_tape_motor_control = use_automatic_tape_motor_control_;
-		}
+		options->quickload = allow_fast_tape_hack_;
+		return options;
+	}
 
-		void clear_all_keys() final {
+	void set_options(const std::unique_ptr<Reflection::Struct> &str) {
-			keyboard_.clear_all_keys();
+		const auto options = dynamic_cast<Options *>(str.get());
-		}
+		set_use_automatic_tape_motor_control(options->automatic_tape_motor_control);
+		allow_fast_tape_hack_ = options->quickload;
+		set_use_fast_tape();
+	}
 
-		static constexpr Sinclair::ZX::Keyboard::Machine keyboard_machine() {
+private:
-			return is_zx81 ? Sinclair::ZX::Keyboard::Machine::ZX81 : Sinclair::ZX::Keyboard::Machine::ZX80;
+	CPU::Z80::Processor<ConcreteMachine, false, is_zx81> z80_;
-		}
+	Video video_;
 
-		// MARK: - Tape control
+	// If fast tape loading is enabled then the PC will be trapped at tape_trap_address_;
+	// the emulator will then do a high-level reinterpretation of the standard ZX80/81 reading
+	// of a single byte, and the next thing executed will be at tape_return_address_;
+	static constexpr uint16_t tape_trap_address_ = is_zx81 ? 0x37c : 0x220;
+	static constexpr uint16_t tape_return_address_ = is_zx81 ? 0x380 : 0x248;
 
-		void set_use_automatic_tape_motor_control(bool enabled) {
+	// If automatic tape motor control is enabled then the tape will be permitted to play any time
-			use_automatic_tape_motor_control_ = enabled;
+	// the program counter is >= automatic_tape_motor_start_address_ and < automatic_tape_motor_end_address_.
-			if(!enabled) {
+	static constexpr uint16_t automatic_tape_motor_start_address_ = is_zx81 ? 0x340 : 0x206;
-				tape_player_.set_motor_control(false);
+	static constexpr uint16_t automatic_tape_motor_end_address_ = is_zx81 ? 0x3c3 : 0x24d;
-			}
-		}
 
-		void set_tape_is_playing(bool is_playing) final {
+	// When automatically loading, if the PC gets to the finished_load_address_ in order to print 0/0
-			tape_player_.set_motor_control(is_playing);
+	// (so it's anything that indicates that loading completed, but the program did not autorun) then the
-		}
+	// emulator will automatically RUN whatever has been loaded.
+	static constexpr uint16_t finished_load_address_ = is_zx81 ?
+		0x6d1 :	// ZX81: this is the routine that prints 0/0 (i.e. success).
+		0x203;	// ZX80: this is the JR that exits the ZX80's LOAD and returns to MAIN-EXEC.
+	bool should_autorun_ = false;
 
-		bool get_tape_is_playing() final {
+	std::vector<uint8_t> ram_;
-			return tape_player_.motor_control();
+	uint16_t ram_mask_, ram_base_;
-		}
 
-		// MARK: - Typer timing
+	std::vector<uint8_t> rom_;
-		HalfCycles get_typer_delay(const std::string &) const final {
+	uint16_t rom_mask_;
-			return z80_.get_is_resetting() ? Cycles(7'000'000) : Cycles(0);
-		}
 
-		HalfCycles get_typer_frequency() const final {
+	bool vsync_ = false, hsync_ = false;
-			return Cycles(159'961);
+	int line_counter_ = 0;
-		}
 
-		KeyboardMapper *get_keyboard_mapper() final {
+	Sinclair::ZX::Keyboard::Keyboard keyboard_;
-			return &keyboard_mapper_;
+	Sinclair::ZX::Keyboard::KeyboardMapper keyboard_mapper_;
-		}
 
-		// MARK: - Configuration options.
+	HalfClockReceiver<Storage::Tape::BinaryTapePlayer> tape_player_;
+	Storage::Tape::ZX8081::Parser parser_;
 
-		std::unique_ptr<Reflection::Struct> get_options() const final {
+	bool nmi_is_enabled_ = false;
-			auto options = std::make_unique<Options>(Configurable::OptionsType::UserFriendly);	// OptionsType is arbitrary, but not optional.
-			options->automatic_tape_motor_control = use_automatic_tape_motor_control_;
-			options->quickload = allow_fast_tape_hack_;
-			return options;
-		}
 
-		void set_options(const std::unique_ptr<Reflection::Struct> &str) {
+	static constexpr auto vsync_start_ = is_zx81 ? HalfCycles(32) : HalfCycles(26);
-			const auto options = dynamic_cast<Options *>(str.get());
+	static constexpr auto vsync_end_ = is_zx81 ? HalfCycles(64) : HalfCycles(66);
-			set_use_automatic_tape_motor_control(options->automatic_tape_motor_control);
+	HalfCycles horizontal_counter_;
-			allow_fast_tape_hack_ = options->quickload;
-			set_use_fast_tape();
-		}
 
-	private:
+	uint8_t latched_video_byte_ = 0;
-		CPU::Z80::Processor<ConcreteMachine, false, is_zx81> z80_;
+	bool has_latched_video_byte_ = false;
-		Video video_;
 
-		// If fast tape loading is enabled then the PC will be trapped at tape_trap_address_;
+	bool use_fast_tape_hack_ = false;
-		// the emulator will then do a high-level reinterpretation of the standard ZX80/81 reading
+	bool allow_fast_tape_hack_ = false;
-		// of a single byte, and the next thing executed will be at tape_return_address_;
+	void set_use_fast_tape() {
-		static constexpr uint16_t tape_trap_address_ = is_zx81 ? 0x37c : 0x220;
+		use_fast_tape_hack_ = allow_fast_tape_hack_ && tape_player_.has_tape();
-		static constexpr uint16_t tape_return_address_ = is_zx81 ? 0x380 : 0x248;
+	}
+	bool use_automatic_tape_motor_control_ = true;
+	HalfCycles tape_advance_delay_ = 0;
 
-		// If automatic tape motor control is enabled then the tape will be permitted to play any time
+	// MARK: - Video
-		// the program counter is >= automatic_tape_motor_start_address_ and < automatic_tape_motor_end_address_.
+	inline void set_vsync(bool sync) {
-		static constexpr uint16_t automatic_tape_motor_start_address_ = is_zx81 ? 0x340 : 0x206;
+		vsync_ = sync;
-		static constexpr uint16_t automatic_tape_motor_end_address_ = is_zx81 ? 0x3c3 : 0x24d;
+		update_sync();
+	}
 
-		// When automatically loading, if the PC gets to the finished_load_address_ in order to print 0/0
+	inline void set_hsync(bool sync) {
-		// (so it's anything that indicates that loading completed, but the program did not autorun) then the
+		hsync_ = sync;
-		// emulator will automatically RUN whatever has been loaded.
+		update_sync();
-		static constexpr uint16_t finished_load_address_ = is_zx81 ?
+	}
-			0x6d1 :	// ZX81: this is the routine that prints 0/0 (i.e. success).
-			0x203;	// ZX80: this is the JR that exits the ZX80's LOAD and returns to MAIN-EXEC.
-		bool should_autorun_ = false;
 
-		std::vector<uint8_t> ram_;
+	inline void update_sync() {
-		uint16_t ram_mask_, ram_base_;
+		video_.set_sync(vsync_ || hsync_);
+	}
 
-		std::vector<uint8_t> rom_;
+	// MARK: - Audio
-		uint16_t rom_mask_;
+	Concurrency::AsyncTaskQueue<false> audio_queue_;
-
+	using AY = GI::AY38910::AY38910<false>;
-		bool vsync_ = false, hsync_ = false;
+	AY ay_;
-		int line_counter_ = 0;
+	Outputs::Speaker::PullLowpass<AY> speaker_;
-
+	HalfCycles time_since_ay_update_;
-		Sinclair::ZX::Keyboard::Keyboard keyboard_;
+	inline void ay_set_register(uint8_t value) {
-		Sinclair::ZX::Keyboard::KeyboardMapper keyboard_mapper_;
+		update_audio();
-
+		GI::AY38910::Utility::select_register(ay_, value);
-		HalfClockReceiver<Storage::Tape::BinaryTapePlayer> tape_player_;
+	}
-		Storage::Tape::ZX8081::Parser parser_;
+	inline void ay_set_data(uint8_t value) {
-
+		update_audio();
-		bool nmi_is_enabled_ = false;
+		GI::AY38910::Utility::write_data(ay_, value);
-
+	}
-		static constexpr auto vsync_start_ = is_zx81 ? HalfCycles(32) : HalfCycles(26);
+	inline uint8_t ay_read_data() {
-		static constexpr auto vsync_end_ = is_zx81 ? HalfCycles(64) : HalfCycles(66);
+		update_audio();
-		HalfCycles horizontal_counter_;
+		return GI::AY38910::Utility::read(ay_);
-
+	}
-		uint8_t latched_video_byte_ = 0;
+	inline void update_audio() {
-		bool has_latched_video_byte_ = false;
+		speaker_.run_for(audio_queue_, time_since_ay_update_.divide_cycles(Cycles(2)));
-
+	}
-		bool use_fast_tape_hack_ = false;
-		bool allow_fast_tape_hack_ = false;
-		void set_use_fast_tape() {
-			use_fast_tape_hack_ = allow_fast_tape_hack_ && tape_player_.has_tape();
-		}
-		bool use_automatic_tape_motor_control_ = true;
-		HalfCycles tape_advance_delay_ = 0;
-
-		// MARK: - Video
-		inline void set_vsync(bool sync) {
-			vsync_ = sync;
-			update_sync();
-		}
-
-		inline void set_hsync(bool sync) {
-			hsync_ = sync;
-			update_sync();
-		}
-
-		inline void update_sync() {
-			video_.set_sync(vsync_ || hsync_);
-		}
-
-		// MARK: - Audio
-		Concurrency::AsyncTaskQueue<false> audio_queue_;
-		using AY = GI::AY38910::AY38910<false>;
-		AY ay_;
-		Outputs::Speaker::PullLowpass<AY> speaker_;
-		HalfCycles time_since_ay_update_;
-		inline void ay_set_register(uint8_t value) {
-			update_audio();
-			GI::AY38910::Utility::select_register(ay_, value);
-		}
-		inline void ay_set_data(uint8_t value) {
-			update_audio();
-			GI::AY38910::Utility::write_data(ay_, value);
-		}
-		inline uint8_t ay_read_data() {
-			update_audio();
-			return GI::AY38910::Utility::read(ay_);
-		}
-		inline void update_audio() {
-			speaker_.run_for(audio_queue_, time_since_ay_update_.divide_cycles(Cycles(2)));
-		}
 };
 
 }

Machines/Sinclair/ZXSpectrum/Video.hpp

@@ -48,134 +48,134 @@ enum class Timing {
 */
 
 template <Timing timing> class Video {
-	private:
+private:
-		struct Timings {
+	struct Timings {
-			// Number of cycles per line. Will be 224 or 228.
+		// Number of cycles per line. Will be 224 or 228.
-			int half_cycles_per_line;
+		int half_cycles_per_line;
-			// Number of lines comprising a whole frame. Will be 311 or 312.
+		// Number of lines comprising a whole frame. Will be 311 or 312.
-			int lines_per_frame;
+		int lines_per_frame;
 
-			// Number of cycles before first pixel fetch that contention starts to be applied.
+		// Number of cycles before first pixel fetch that contention starts to be applied.
-			int contention_leadin;
+		int contention_leadin;
-			// Period in a line for which contention is applied.
+		// Period in a line for which contention is applied.
-			int contention_duration;
+		int contention_duration;
 
-			// Number of cycles after first pixel fetch at which interrupt is first signalled.
+		// Number of cycles after first pixel fetch at which interrupt is first signalled.
-			int interrupt_time;
+		int interrupt_time;
 
-			// Contention to apply, in whole cycles, as a function of number of whole cycles since
+		// Contention to apply, in whole cycles, as a function of number of whole cycles since
-			// contention began.
+		// contention began.
-			int delays[8];
+		int delays[8];
 
-			constexpr Timings(
+		constexpr Timings(
-				const int cycles_per_line,
+			const int cycles_per_line,
-				const int lines_per_frame,
+			const int lines_per_frame,
-				const int contention_leadin,
+			const int contention_leadin,
-				const int contention_duration,
+			const int contention_duration,
-				const int interrupt_offset,
+			const int interrupt_offset,
-				const int (&delays)[8])
+			const int (&delays)[8])
-			noexcept :
+		noexcept :
-				half_cycles_per_line(cycles_per_line * 2),
+			half_cycles_per_line(cycles_per_line * 2),
-				lines_per_frame(lines_per_frame),
+			lines_per_frame(lines_per_frame),
-				contention_leadin(contention_leadin * 2),
+			contention_leadin(contention_leadin * 2),
-				contention_duration(contention_duration * 2),
+			contention_duration(contention_duration * 2),
-				interrupt_time((cycles_per_line * lines_per_frame - interrupt_offset - contention_leadin) * 2),
+			interrupt_time((cycles_per_line * lines_per_frame - interrupt_offset - contention_leadin) * 2),
-				delays{
+			delays{
-					delays[0] * 2,
+				delays[0] * 2,
-					delays[1] * 2,
+				delays[1] * 2,
-					delays[2] * 2,
+				delays[2] * 2,
-					delays[3] * 2,
+				delays[3] * 2,
-					delays[4] * 2,
+				delays[4] * 2,
-					delays[5] * 2,
+				delays[5] * 2,
-					delays[6] * 2,
+				delays[6] * 2,
-					delays[7] * 2
+				delays[7] * 2
-				}
-			 {}
-		};
-
-		static constexpr Timings get_timings() {
-			if constexpr (timing == Timing::Plus3) {
-				constexpr int delays[] = {1, 0, 7, 6, 5, 4, 3, 2};
-				return Timings(228, 311, 6, 129, 14361, delays);
 			}
+		 {}
+	};
 
-			if constexpr (timing == Timing::OneTwoEightK) {
+	static constexpr Timings get_timings() {
-				constexpr int delays[] = {6, 5, 4, 3, 2, 1, 0, 0};
+		if constexpr (timing == Timing::Plus3) {
-				return Timings(228, 311, 4, 128, 14361, delays);
+			constexpr int delays[] = {1, 0, 7, 6, 5, 4, 3, 2};
-			}
+			return Timings(228, 311, 6, 129, 14361, delays);
-
-			if constexpr (timing == Timing::FortyEightK) {
-				constexpr int delays[] = {6, 5, 4, 3, 2, 1, 0, 0};
-				return Timings(224, 312, 4, 128, 14335, delays);
-			}
 		}
 
-		// Interrupt should be held for 32 cycles.
+		if constexpr (timing == Timing::OneTwoEightK) {
-		static constexpr int interrupt_duration = 64;
+			constexpr int delays[] = {6, 5, 4, 3, 2, 1, 0, 0};
+			return Timings(228, 311, 4, 128, 14361, delays);
+		}
 
-	public:
+		if constexpr (timing == Timing::FortyEightK) {
-		void run_for(HalfCycles duration) {
+			constexpr int delays[] = {6, 5, 4, 3, 2, 1, 0, 0};
-			static constexpr auto timings = get_timings();
+			return Timings(224, 312, 4, 128, 14335, delays);
+		}
+	}
 
-			static constexpr int sync_line = (timings.interrupt_time / timings.half_cycles_per_line) + 1;
+	// Interrupt should be held for 32 cycles.
+	static constexpr int interrupt_duration = 64;
 
-			static constexpr int sync_position = (timing == Timing::FortyEightK) ? 164 * 2 : 166 * 2;
+public:
-			static constexpr int sync_length = 17 * 2;
+	void run_for(HalfCycles duration) {
-			static constexpr int burst_position = sync_position + 40;
+		static constexpr auto timings = get_timings();
-			static constexpr int burst_length = 17;
 
-			int cycles_remaining = duration.as<int>();
+		static constexpr int sync_line = (timings.interrupt_time / timings.half_cycles_per_line) + 1;
-			while(cycles_remaining) {
-				int line = time_into_frame_ / timings.half_cycles_per_line;
-				int offset = time_into_frame_ % timings.half_cycles_per_line;
-				const int cycles_this_line = std::min(cycles_remaining, timings.half_cycles_per_line - offset);
-				const int end_offset = offset + cycles_this_line;
 
-				if(!offset) {
+		static constexpr int sync_position = (timing == Timing::FortyEightK) ? 164 * 2 : 166 * 2;
-					is_alternate_line_ ^= true;
+		static constexpr int sync_length = 17 * 2;
+		static constexpr int burst_position = sync_position + 40;
+		static constexpr int burst_length = 17;
 
-					if(!line) {
+		int cycles_remaining = duration.as<int>();
-						flash_counter_ = (flash_counter_ + 1) & 31;
+		while(cycles_remaining) {
-						flash_mask_ = uint8_t(flash_counter_ >> 4);
+			int line = time_into_frame_ / timings.half_cycles_per_line;
-					}
+			int offset = time_into_frame_ % timings.half_cycles_per_line;
+			const int cycles_this_line = std::min(cycles_remaining, timings.half_cycles_per_line - offset);
+			const int end_offset = offset + cycles_this_line;
+
+			if(!offset) {
+				is_alternate_line_ ^= true;
+
+				if(!line) {
+					flash_counter_ = (flash_counter_ + 1) & 31;
+					flash_mask_ = uint8_t(flash_counter_ >> 4);
 				}
+			}
 
-				if(line >= sync_line && line < sync_line + 3) {
+			if(line >= sync_line && line < sync_line + 3) {
-					// Output sync line.
+				// Output sync line.
-					crt_.output_sync(cycles_this_line);
+				crt_.output_sync(cycles_this_line);
+			} else {
+				if(line >= 192) {
+					// Output plain border line.
+					if(offset < sync_position) {
+						const int border_duration = std::min(sync_position, end_offset) - offset;
+						crt_.output_level<uint8_t>(border_duration, border_colour_);
+						offset += border_duration;
+					}
 				} else {
-					if(line >= 192) {
+					// Output pixel line.
-						// Output plain border line.
+					if(offset < 256) {
-						if(offset < sync_position) {
+						const int pixel_duration = std::min(256, end_offset) - offset;
-							const int border_duration = std::min(sync_position, end_offset) - offset;
+
-							crt_.output_level<uint8_t>(border_duration, border_colour_);
+						if(!offset) {
-							offset += border_duration;
+							pixel_target_ = crt_.begin_data(256);
+							attribute_address_ = ((line >> 3) << 5) + 6144;
+							pixel_address_ = ((line & 0x07) << 8) | ((line & 0x38) << 2) | ((line & 0xc0) << 5);
 						}
-					} else {
-						// Output pixel line.
-						if(offset < 256) {
-							const int pixel_duration = std::min(256, end_offset) - offset;
 
-							if(!offset) {
+						if(pixel_target_) {
-								pixel_target_ = crt_.begin_data(256);
+							const int start_column = offset >> 4;
-								attribute_address_ = ((line >> 3) << 5) + 6144;
+							const int end_column = (offset + pixel_duration) >> 4;
-								pixel_address_ = ((line & 0x07) << 8) | ((line & 0x38) << 2) | ((line & 0xc0) << 5);
+							for(int column = start_column; column < end_column; column++) {
-							}
+								last_fetches_[0] = memory_[pixel_address_];
+								last_fetches_[1] = memory_[attribute_address_];
+								last_fetches_[2] = memory_[pixel_address_+1];
+								last_fetches_[3] = memory_[attribute_address_+1];
+								set_last_contended_area_access(last_fetches_[3]);
 
-							if(pixel_target_) {
+								pixel_address_ += 2;
-								const int start_column = offset >> 4;
+								attribute_address_ += 2;
-								const int end_column = (offset + pixel_duration) >> 4;
-								for(int column = start_column; column < end_column; column++) {
-									last_fetches_[0] = memory_[pixel_address_];
-									last_fetches_[1] = memory_[attribute_address_];
-									last_fetches_[2] = memory_[pixel_address_+1];
-									last_fetches_[3] = memory_[attribute_address_+1];
-									set_last_contended_area_access(last_fetches_[3]);
 
-									pixel_address_ += 2;
+								constexpr uint8_t masks[] = {0, 0xff};
-									attribute_address_ += 2;
-
-									constexpr uint8_t masks[] = {0, 0xff};
 
 #define Output(n)	\
 	{				\
@@ -198,269 +198,269 @@ template <Timing timing> class Video {
 		pixel_target_ += 8;									\
 	}
 
-									Output(0);
+								Output(0);
-									Output(2);
+								Output(2);
 
 #undef Output
-								}
-							}
-
-							offset += pixel_duration;
-							if(offset == 256) {
-								crt_.output_data(256);
-								pixel_target_ = nullptr;
 							}
 						}
 
-						if(offset >= 256 && offset < sync_position && end_offset > offset) {
+						offset += pixel_duration;
-							const int border_duration = std::min(sync_position, end_offset) - offset;
+						if(offset == 256) {
-							crt_.output_level<uint8_t>(border_duration, border_colour_);
+							crt_.output_data(256);
-							offset += border_duration;
+							pixel_target_ = nullptr;
 						}
 					}
 
-					// Output the common tail to border and pixel lines: sync, blank, colour burst, border.
+					if(offset >= 256 && offset < sync_position && end_offset > offset) {
-
+						const int border_duration = std::min(sync_position, end_offset) - offset;
-					if(offset >= sync_position && offset < sync_position + sync_length && end_offset > offset) {
+						crt_.output_level<uint8_t>(border_duration, border_colour_);
-						const int sync_duration = std::min(sync_position + sync_length, end_offset) - offset;
+						offset += border_duration;
-						crt_.output_sync(sync_duration);
-						offset += sync_duration;
-					}
-
-					if(offset >= sync_position + sync_length && offset < burst_position && end_offset > offset) {
-						const int blank_duration = std::min(burst_position, end_offset) - offset;
-						crt_.output_blank(blank_duration);
-						offset += blank_duration;
-					}
-
-					if(offset >= burst_position && offset < burst_position+burst_length && end_offset > offset) {
-						const int burst_duration = std::min(burst_position + burst_length, end_offset) - offset;
-
-						if constexpr (timing >= Timing::OneTwoEightK) {
-							crt_.output_colour_burst(burst_duration, 116, is_alternate_line_);
-							// The colour burst phase above is an empirical guess. I need to research further.
-						} else {
-							crt_.output_default_colour_burst(burst_duration);
-						}
-						offset += burst_duration;
-					}
-
-					if(offset >= burst_position+burst_length && end_offset > offset) {
-						crt_.output_level<uint8_t>(end_offset - offset, border_colour_);
 					}
 				}
 
-				cycles_remaining -= cycles_this_line;
+				// Output the common tail to border and pixel lines: sync, blank, colour burst, border.
-				time_into_frame_ = (time_into_frame_ + cycles_this_line) % (timings.half_cycles_per_line * timings.lines_per_frame);
-			}
-		}
 
-	private:
+				if(offset >= sync_position && offset < sync_position + sync_length && end_offset > offset) {
-		static constexpr int half_cycles_per_line() {
+					const int sync_duration = std::min(sync_position + sync_length, end_offset) - offset;
-			if constexpr (timing == Timing::FortyEightK) {
+					crt_.output_sync(sync_duration);
-				// TODO: determine real figure here, if one exists.
+					offset += sync_duration;
-				// The source I'm looking at now suggests that the theoretical
+				}
-				// ideal of 224*2 ignores the real-life effects of separate
-				// crystals, so I've nudged this experimentally.
-				return 224*2 - 1;
-			} else {
-				return 227*2;
-			}
-		}
 
-		static constexpr HalfCycles frame_duration() {
+				if(offset >= sync_position + sync_length && offset < burst_position && end_offset > offset) {
-			const auto timings = get_timings();
+					const int blank_duration = std::min(burst_position, end_offset) - offset;
-			return HalfCycles(timings.half_cycles_per_line * timings.lines_per_frame);
+					crt_.output_blank(blank_duration);
-		}
+					offset += blank_duration;
+				}
 
-		HalfCycles time_since_interrupt() {
+				if(offset >= burst_position && offset < burst_position+burst_length && end_offset > offset) {
-			const auto timings = get_timings();
+					const int burst_duration = std::min(burst_position + burst_length, end_offset) - offset;
-			if(time_into_frame_ >= timings.interrupt_time) {
-				return HalfCycles(time_into_frame_ - timings.interrupt_time);
-			} else {
-				return HalfCycles(time_into_frame_) + frame_duration() - HalfCycles(timings.interrupt_time);
-			}
-		}
 
-		void set_time_since_interrupt(const HalfCycles time) {
+					if constexpr (timing >= Timing::OneTwoEightK) {
-			// Advance using run_for to ensure that all proper CRT interactions occurred.
+						crt_.output_colour_burst(burst_duration, 116, is_alternate_line_);
-			const auto timings = get_timings();
+						// The colour burst phase above is an empirical guess. I need to research further.
-			const auto target = (time + timings.interrupt_time) % frame_duration();
+					} else {
-			const auto now = HalfCycles(time_into_frame_);
+						crt_.output_default_colour_burst(burst_duration);
+					}
+					offset += burst_duration;
+				}
 
-			// Maybe this is easy?
+				if(offset >= burst_position+burst_length && end_offset > offset) {
-			if(target == now) return;
+					crt_.output_level<uint8_t>(end_offset - offset, border_colour_);
-
+				}
-			// Is the time within this frame?
-			if(time > now) {
-				run_for(target - time);
-				return;
 			}
 
-			// Then it's necessary to finish this frame and run into the next.
+			cycles_remaining -= cycles_this_line;
-			run_for(frame_duration() - now + time);
+			time_into_frame_ = (time_into_frame_ + cycles_this_line) % (timings.half_cycles_per_line * timings.lines_per_frame);
+		}
+	}
+
+private:
+	static constexpr int half_cycles_per_line() {
+		if constexpr (timing == Timing::FortyEightK) {
+			// TODO: determine real figure here, if one exists.
+			// The source I'm looking at now suggests that the theoretical
+			// ideal of 224*2 ignores the real-life effects of separate
+			// crystals, so I've nudged this experimentally.
+			return 224*2 - 1;
+		} else {
+			return 227*2;
+		}
+	}
+
+	static constexpr HalfCycles frame_duration() {
+		const auto timings = get_timings();
+		return HalfCycles(timings.half_cycles_per_line * timings.lines_per_frame);
+	}
+
+	HalfCycles time_since_interrupt() {
+		const auto timings = get_timings();
+		if(time_into_frame_ >= timings.interrupt_time) {
+			return HalfCycles(time_into_frame_ - timings.interrupt_time);
+		} else {
+			return HalfCycles(time_into_frame_) + frame_duration() - HalfCycles(timings.interrupt_time);
+		}
+	}
+
+	void set_time_since_interrupt(const HalfCycles time) {
+		// Advance using run_for to ensure that all proper CRT interactions occurred.
+		const auto timings = get_timings();
+		const auto target = (time + timings.interrupt_time) % frame_duration();
+		const auto now = HalfCycles(time_into_frame_);
+
+		// Maybe this is easy?
+		if(target == now) return;
+
+		// Is the time within this frame?
+		if(time > now) {
+			run_for(target - time);
+			return;
 		}
 
-	public:
+		// Then it's necessary to finish this frame and run into the next.
-		Video() :
+		run_for(frame_duration() - now + time);
-			crt_(half_cycles_per_line(), 2, Outputs::Display::Type::PAL50, Outputs::Display::InputDataType::Red2Green2Blue2)
+	}
-		{
-			// Show only the centre 80% of the TV frame.
-			crt_.set_display_type(Outputs::Display::DisplayType::RGB);
-			crt_.set_visible_area(Outputs::Display::Rect(0.1f, 0.1f, 0.8f, 0.8f));
 
-			// Get the CRT roughly into phase.
+public:
-			//
+	Video() :
-			// TODO: this is coupled to an assumption about the initial CRT. Fix.
+		crt_(half_cycles_per_line(), 2, Outputs::Display::Type::PAL50, Outputs::Display::InputDataType::Red2Green2Blue2)
-			const auto timings = get_timings();
+	{
-			crt_.output_blank(timings.lines_per_frame*timings.half_cycles_per_line - timings.interrupt_time);
+		// Show only the centre 80% of the TV frame.
+		crt_.set_display_type(Outputs::Display::DisplayType::RGB);
+		crt_.set_visible_area(Outputs::Display::Rect(0.1f, 0.1f, 0.8f, 0.8f));
+
+		// Get the CRT roughly into phase.
+		//
+		// TODO: this is coupled to an assumption about the initial CRT. Fix.
+		const auto timings = get_timings();
+		crt_.output_blank(timings.lines_per_frame*timings.half_cycles_per_line - timings.interrupt_time);
+	}
+
+	void set_video_source(const uint8_t *source) {
+		memory_ = source;
+	}
+
+	/*!
+		@returns The amount of time until the next change in the interrupt line, that being the only internally-observeable output.
+	*/
+	HalfCycles next_sequence_point() {
+		constexpr auto timings = get_timings();
+
+		// Is the frame still ahead of this interrupt?
+		if(time_into_frame_ < timings.interrupt_time) {
+			return HalfCycles(timings.interrupt_time - time_into_frame_);
 		}
 
-		void set_video_source(const uint8_t *source) {
+		// If not, is it within this interrupt?
-			memory_ = source;
+		if(time_into_frame_ < timings.interrupt_time + interrupt_duration) {
+			return HalfCycles(timings.interrupt_time + interrupt_duration - time_into_frame_);
 		}
 
-		/*!
+		// If not, it'll be in the next batch.
-			@returns The amount of time until the next change in the interrupt line, that being the only internally-observeable output.
+		return timings.interrupt_time + timings.half_cycles_per_line * timings.lines_per_frame - time_into_frame_;
-		*/
+	}
-		HalfCycles next_sequence_point() {
-			constexpr auto timings = get_timings();
 
-			// Is the frame still ahead of this interrupt?
+	/*!
-			if(time_into_frame_ < timings.interrupt_time) {
+		@returns The current state of the interrupt output.
-				return HalfCycles(timings.interrupt_time - time_into_frame_);
+	*/
-			}
+	bool get_interrupt_line() const {
+		constexpr auto timings = get_timings();
+		return time_into_frame_ >= timings.interrupt_time && time_into_frame_ < timings.interrupt_time + interrupt_duration;
+	}
 
-			// If not, is it within this interrupt?
+	/*!
-			if(time_into_frame_ < timings.interrupt_time + interrupt_duration) {
+		@returns How many cycles the [ULA/gate array] would delay the CPU for if it were to recognise that contention
-				return HalfCycles(timings.interrupt_time + interrupt_duration - time_into_frame_);
+		needs to be applied in @c offset half-cycles from now.
-			}
+	*/
+	HalfCycles access_delay(HalfCycles offset) const {
+		constexpr auto timings = get_timings();
+		const int delay_time = (time_into_frame_ + offset.as<int>() + timings.contention_leadin) % (timings.half_cycles_per_line * timings.lines_per_frame);
+		assert(!(delay_time&1));
 
-			// If not, it'll be in the next batch.
+		// Check for a time within the no-contention window.
-			return timings.interrupt_time + timings.half_cycles_per_line * timings.lines_per_frame - time_into_frame_;
+		if(delay_time >= (191*timings.half_cycles_per_line + timings.contention_duration)) {
+			return 0;
 		}
 
-		/*!
+		const int time_into_line = delay_time % timings.half_cycles_per_line;
-			@returns The current state of the interrupt output.
+		if(time_into_line >= timings.contention_duration) {
-		*/
+			return 0;
-		bool get_interrupt_line() const {
-			constexpr auto timings = get_timings();
-			return time_into_frame_ >= timings.interrupt_time && time_into_frame_ < timings.interrupt_time + interrupt_duration;
 		}
 
-		/*!
+		return HalfCycles(timings.delays[(time_into_line >> 1) & 7]);
-			@returns How many cycles the [ULA/gate array] would delay the CPU for if it were to recognise that contention
+	}
-			needs to be applied in @c offset half-cycles from now.
-		*/
-		HalfCycles access_delay(HalfCycles offset) const {
-			constexpr auto timings = get_timings();
-			const int delay_time = (time_into_frame_ + offset.as<int>() + timings.contention_leadin) % (timings.half_cycles_per_line * timings.lines_per_frame);
-			assert(!(delay_time&1));
 
-			// Check for a time within the no-contention window.
+	/*!
-			if(delay_time >= (191*timings.half_cycles_per_line + timings.contention_duration)) {
+		@returns Whatever the ULA or gate array would expose via the floating bus, this cycle.
-				return 0;
+	*/
-			}
+	uint8_t get_floating_value() const {
+		constexpr auto timings = get_timings();
+		const uint8_t out_of_bounds = (timing == Timing::Plus3) ? last_contended_access_ : 0xff;
 
-			const int time_into_line = delay_time % timings.half_cycles_per_line;
+		const int line = time_into_frame_ / timings.half_cycles_per_line;
-			if(time_into_line >= timings.contention_duration) {
+		if(line >= 192) {
-				return 0;
+			return out_of_bounds;
-			}
-
-			return HalfCycles(timings.delays[(time_into_line >> 1) & 7]);
 		}
 
-		/*!
+		const int time_into_line = time_into_frame_ % timings.half_cycles_per_line;
-			@returns Whatever the ULA or gate array would expose via the floating bus, this cycle.
+		if(time_into_line >= 256 || (time_into_line&8)) {
-		*/
+			return out_of_bounds;
-		uint8_t get_floating_value() const {
-			constexpr auto timings = get_timings();
-			const uint8_t out_of_bounds = (timing == Timing::Plus3) ? last_contended_access_ : 0xff;
-
-			const int line = time_into_frame_ / timings.half_cycles_per_line;
-			if(line >= 192) {
-				return out_of_bounds;
-			}
-
-			const int time_into_line = time_into_frame_ % timings.half_cycles_per_line;
-			if(time_into_line >= 256 || (time_into_line&8)) {
-				return out_of_bounds;
-			}
-
-			// The +2a and +3 always return the low bit as set.
-			const uint8_t value = last_fetches_[(time_into_line >> 1) & 3];
-			if constexpr (timing == Timing::Plus3) {
-				return value | 1;
-			}
-			return value;
 		}
 
-		/*!
+		// The +2a and +3 always return the low bit as set.
-			Relevant to the +2a and +3 only, sets the most recent value read from or
+		const uint8_t value = last_fetches_[(time_into_line >> 1) & 3];
-			written to contended memory. This is what will be returned if the floating
+		if constexpr (timing == Timing::Plus3) {
-			bus is accessed when the gate array isn't currently reading.
+			return value | 1;
-		*/
-		void set_last_contended_area_access([[maybe_unused]] uint8_t value) {
-			if constexpr (timing == Timing::Plus3) {
-				last_contended_access_ = value | 1;
-			}
 		}
+		return value;
+	}
 
-		/*!
+	/*!
-			Sets the current border colour.
+		Relevant to the +2a and +3 only, sets the most recent value read from or
-		*/
+		written to contended memory. This is what will be returned if the floating
-		void set_border_colour(uint8_t colour) {
+		bus is accessed when the gate array isn't currently reading.
-			border_byte_ = colour;
+	*/
-			border_colour_ = palette[colour];
+	void set_last_contended_area_access([[maybe_unused]] uint8_t value) {
+		if constexpr (timing == Timing::Plus3) {
+			last_contended_access_ = value | 1;
 		}
+	}
 
-		/// Sets the scan target.
+	/*!
-		void set_scan_target(Outputs::Display::ScanTarget *scan_target) {
+		Sets the current border colour.
-			crt_.set_scan_target(scan_target);
+	*/
-		}
+	void set_border_colour(uint8_t colour) {
+		border_byte_ = colour;
+		border_colour_ = palette[colour];
+	}
 
-		/// Gets the current scan status.
+	/// Sets the scan target.
-		Outputs::Display::ScanStatus get_scaled_scan_status() const {
+	void set_scan_target(Outputs::Display::ScanTarget *scan_target) {
-			return crt_.get_scaled_scan_status();
+		crt_.set_scan_target(scan_target);
-		}
+	}
 
-		/*! Sets the type of display the CRT will request. */
+	/// Gets the current scan status.
-		void set_display_type(Outputs::Display::DisplayType type) {
+	Outputs::Display::ScanStatus get_scaled_scan_status() const {
-			crt_.set_display_type(type);
+		return crt_.get_scaled_scan_status();
-		}
+	}
 
-		/*! Gets the display type. */
+	/*! Sets the type of display the CRT will request. */
-		Outputs::Display::DisplayType get_display_type() const {
+	void set_display_type(Outputs::Display::DisplayType type) {
-			return crt_.get_display_type();
+		crt_.set_display_type(type);
-		}
+	}
 
-	private:
+	/*! Gets the display type. */
-		int time_into_frame_ = 0;
+	Outputs::Display::DisplayType get_display_type() const {
-		Outputs::CRT::CRT crt_;
+		return crt_.get_display_type();
-		const uint8_t *memory_ = nullptr;
+	}
-		uint8_t border_colour_ = 0;
-		uint8_t border_byte_ = 0;
 
-		uint8_t *pixel_target_ = nullptr;
+private:
-		int attribute_address_ = 0;
+	int time_into_frame_ = 0;
-		int pixel_address_ = 0;
+	Outputs::CRT::CRT crt_;
+	const uint8_t *memory_ = nullptr;
+	uint8_t border_colour_ = 0;
+	uint8_t border_byte_ = 0;
 
-		uint8_t flash_mask_ = 0;
+	uint8_t *pixel_target_ = nullptr;
-		int flash_counter_ = 0;
+	int attribute_address_ = 0;
-		bool is_alternate_line_ = false;
+	int pixel_address_ = 0;
 
-		uint8_t last_fetches_[4] = {0xff, 0xff, 0xff, 0xff};
+	uint8_t flash_mask_ = 0;
-		uint8_t last_contended_access_ = 0xff;
+	int flash_counter_ = 0;
+	bool is_alternate_line_ = false;
 
-		friend struct State;
+	uint8_t last_fetches_[4] = {0xff, 0xff, 0xff, 0xff};
+	uint8_t last_contended_access_ = 0xff;
+
+	friend struct State;
 
 #define RGB(r, g, b)	(r << 4) | (g << 2) | b
-		static constexpr uint8_t palette[] = {
+	static constexpr uint8_t palette[] = {
-			RGB(0, 0, 0),	RGB(0, 0, 2),	RGB(2, 0, 0),	RGB(2, 0, 2),
+		RGB(0, 0, 0),	RGB(0, 0, 2),	RGB(2, 0, 0),	RGB(2, 0, 2),
-			RGB(0, 2, 0),	RGB(0, 2, 2),	RGB(2, 2, 0),	RGB(2, 2, 2),
+		RGB(0, 2, 0),	RGB(0, 2, 2),	RGB(2, 2, 0),	RGB(2, 2, 2),
-			RGB(0, 0, 0),	RGB(0, 0, 3),	RGB(3, 0, 0),	RGB(3, 0, 3),
+		RGB(0, 0, 0),	RGB(0, 0, 3),	RGB(3, 0, 0),	RGB(3, 0, 3),
-			RGB(0, 3, 0),	RGB(0, 3, 3),	RGB(3, 3, 0),	RGB(3, 3, 3),
+		RGB(0, 3, 0),	RGB(0, 3, 3),	RGB(3, 3, 0),	RGB(3, 3, 3),
-		};
+	};
 #undef RGB
 };
 

Machines/Utility/ROMCatalogue.hpp

@@ -30,6 +30,7 @@ enum Name {
 	AcornADFS,
 	PRESAdvancedPlus6,
 	Acorn1770DFS,
+	AcornIDEADFS103,
 
 	// Acorn Archimedes.
 	AcornArthur030,
@@ -223,8 +224,20 @@ struct Description {
 
 private:
 	template <typename FileNameT, typename CRC32T> Description(
-		Name name, std::string machine_name, std::string descriptive_name, FileNameT file_names, size_t size, CRC32T crc32s = uint32_t(0)
+		const Name name,
-	) : name{name}, machine_name{machine_name}, descriptive_name{descriptive_name}, file_names{file_names}, size{size}, crc32s{crc32s} {
+		const char *machine_name,
+		const char *descriptive_name,
+		const FileNameT &file_names,
+		const size_t size,
+		const CRC32T crc32s = uint32_t(0)
+	) :
+		name{name},
+		machine_name{machine_name},
+		descriptive_name{descriptive_name},
+		file_names{file_names},
+		size{size},
+		crc32s{crc32s}
+	{
 		// Slightly lazy: deal with the case where the constructor wasn't provided with any
 		// CRCs by spotting that the set has exactly one member, which has value 0. The alternative
 		// would be to provide a partial specialisation that never put anything into the set.
@@ -232,6 +245,8 @@ private:
 			this->crc32s.clear();
 		}
 	}
+
+	static const std::vector<Description> &all_roms();
 };
 
 /// @returns a vector of all possible instances of ROM::Description — i.e. descriptions of every ROM

Numeric/BitSpread.hpp

@@ -16,7 +16,7 @@ namespace Numeric {
 /// keeping the least-significant bit in its original position.
 ///
 /// i.e. if @c input is abcdefgh then the result is 0a0b0c0d0e0f0g0h
-constexpr uint16_t spread_bits(uint8_t input) {
+constexpr uint16_t spread_bits(const uint8_t input) {
 	uint16_t result = uint16_t(input);				// 0000 0000 abcd efgh
 	result = (result | (result << 4)) & 0x0f0f;		// 0000 abcd 0000 efgh
 	result = (result | (result << 2)) & 0x3333;		// 00ab 00cd 00ef 00gh
@@ -26,11 +26,12 @@ constexpr uint16_t spread_bits(uint8_t input) {
 /// Performs the opposite action to @c spread_bits; given the 16-bit input
 /// @c abcd @c efgh @c ijkl @c mnop, returns the byte value @c bdfhjlnp
 /// i.e. every other bit is retained, keeping the least-significant bit in place.
-constexpr uint8_t unspread_bits(uint16_t input) {
+constexpr uint8_t unspread_bits(const uint16_t input) {
-	input &= 0x5555;								// 0a0b 0c0d 0e0f 0g0h
+	uint16_t result = input;
-	input = (input | (input >> 1)) & 0x3333;		// 00ab 00cd 00ef 00gh
+	result &= 0x5555;								// 0a0b 0c0d 0e0f 0g0h
-	input = (input | (input >> 2)) & 0x0f0f;		// 0000 abcd 0000 efgh
+	result = (result | (result >> 1)) & 0x3333;		// 00ab 00cd 00ef 00gh
-	return uint8_t(input | (input >> 4));			// 0000 0000 abcd efgh
+	result = (result | (result >> 2)) & 0x0f0f;		// 0000 abcd 0000 efgh
+	return uint8_t(result | (result >> 4));			// 0000 0000 abcd efgh
 }
 
 }

Numeric/LFSR.hpp

@@ -61,7 +61,7 @@ public:
 
 		An initial value of 0 is invalid.
 	*/
-	LFSR(IntType initial_value) : value_(initial_value) {}
+	LFSR(const IntType initial_value) : value_(initial_value) {}
 
 	/*!
 		Advances the LSFR, returning either an @c IntType of value @c 1 or @c 0,

Numeric/NumericCoder.hpp

@@ -30,13 +30,13 @@ namespace Numeric {
 template <int... Sizes> class NumericCoder {
 public:
 	/// Modifies @c target to hold @c value at @c index.
-	template <int index> static void encode(int &target, int value) {
+	template <int index> static void encode(int &target, const int value) {
 		static_assert(index < sizeof...(Sizes), "Index must be within range");
 		NumericEncoder<Sizes...>::template encode<index>(target, value);
 	}
 
 	/// @returns The value from @c source at @c index.
-	template <int index> static int decode(int source) {
+	template <int index> static int decode(const int source) {
 		static_assert(index < sizeof...(Sizes), "Index must be within range");
 		return NumericDecoder<Sizes...>::template decode<index>(source);
 	}
@@ -45,7 +45,7 @@ private:
 
 	template <int size, int... Tail>
 	struct NumericEncoder {
-		template <int index, int i = 0, int divider = 1> static void encode(int &target, int value) {
+		template <int index, int i = 0, int divider = 1> static void encode(int &target, const int value) {
 			if constexpr (i == index) {
 				const int suffix = target % divider;
 				target /= divider;
@@ -61,7 +61,7 @@ private:
 
 	template <int size, int... Tail>
 	struct NumericDecoder {
-		template <int index, int i = 0, int divider = 1> static int decode(int source) {
+		template <int index, int i = 0, int divider = 1> static int decode(const int source) {
 			if constexpr (i == index) {
 				return (source / divider) % size;
 			} else {

OSBindings/Mac/Clock Signal.xcodeproj/xcshareddata/xcschemes/Clock Signal.xcscheme

@@ -62,7 +62,7 @@
       </Testables>
    </TestAction>
    <LaunchAction
-      buildConfiguration = "Debug"
+      buildConfiguration = "Release"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       enableASanStackUseAfterReturn = "YES"

Outputs/Log.hpp

@@ -76,7 +76,7 @@ enum class EnabledLevel {
 
 constexpr EnabledLevel enabled_level(const Source source) {
 #ifdef NDEBUG
-	return false;
+	return EnabledLevel::None;
 #endif
 
 	// Allow for compile-time source-level enabling and disabling of different sources.

Outputs/OpenGL/Primitives/Shader.cpp

@@ -24,7 +24,7 @@ GLuint Shader::compile_shader(const std::string &source, GLenum type) {
 	test_gl(glShaderSource, shader, 1, &c_str, NULL);
 	test_gl(glCompileShader, shader);
 
-	if constexpr (logger.enabled) {
+	if constexpr (logger.ErrorsEnabled) {
 		GLint isCompiled = 0;
 		test_gl(glGetShaderiv, shader, GL_COMPILE_STATUS, &isCompiled);
 		if(isCompiled == GL_FALSE) {
@@ -69,7 +69,7 @@ void Shader::init(const std::string &vertex_shader, const std::string &fragment_
 	for(const auto &binding : attribute_bindings) {
 		test_gl(glBindAttribLocation, shader_program_, binding.index, binding.name.c_str());
 
-		if constexpr (logger.enabled) {
+		if constexpr (logger.ErrorsEnabled) {
 			const auto error = glGetError();
 			switch(error) {
 				case 0: break;
@@ -88,7 +88,7 @@ void Shader::init(const std::string &vertex_shader, const std::string &fragment_
 
 	test_gl(glLinkProgram, shader_program_);
 
-	if constexpr (logger.enabled) {
+	if constexpr (logger.ErrorsEnabled) {
 		GLint logLength;
 		test_gl(glGetProgramiv, shader_program_, GL_INFO_LOG_LENGTH, &logLength);
 		if(logLength > 0) {

ROMImages/Electron/readme.txt

@@ -8,7 +8,8 @@ DFS-1770-2.20.rom	— used only if the user opens a DFS disk image
 ADFS-E00_1.rom		— used only if the user opens an ADFS disk image
 ADFS-E00_2.rom
 AP6v133.rom			— used only if the user opens a disk image that makes use of any of the commands given below.
-adfs.rom			- used only if the user opens a hard disk image
+adfs.rom			— used only if the user opens a hard disk image or requests a SCSI interface
+ELK103.rom			— used only if the user requests an IDE interface
 
 Possibly to be desired in the future:
 * os300.rom