overrides in drivers (nw)

src/mame/audio/arcadia.h

@@ -26,9 +26,9 @@ public:
 	DECLARE_WRITE8_MEMBER(write);
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_reset();
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void device_start() override;
+	virtual void device_reset() override;
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 	sound_stream *m_channel;
 	UINT8 m_reg[3];

src/mame/audio/atarijsa.h

@@ -106,8 +106,8 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 	// internal helpers
 	virtual void update_all_volumes() = 0;
@@ -149,11 +149,11 @@ public:
 
 protected:
 	// device level overrides
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 	// internal helpers
-	virtual void update_all_volumes();
+	virtual void update_all_volumes() override;
 
 	// devices
 	optional_device<okim6295_device> m_oki1;
@@ -189,13 +189,13 @@ public:
 
 protected:
 	// device level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual ioport_constructor device_input_ports() const;
-	virtual void device_start();
-	virtual void device_reset();
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual ioport_constructor device_input_ports() const override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 	// internal helpers
-	virtual void update_all_volumes();
+	virtual void update_all_volumes() override;
 
 	// devices
 	optional_device<pokey_device> m_pokey;
@@ -221,8 +221,8 @@ public:
 
 protected:
 	// device level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual ioport_constructor device_input_ports() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual ioport_constructor device_input_ports() const override;
 
 	required_ioport m_jsaii;
 };
@@ -246,8 +246,8 @@ public:
 
 protected:
 	// device level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual ioport_constructor device_input_ports() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual ioport_constructor device_input_ports() const override;
 
 	required_ioport m_jsaiii;
 };
@@ -263,7 +263,7 @@ public:
 
 protected:
 	// device level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 };
 
 

src/mame/audio/cage.h

@@ -31,7 +31,7 @@ public:
 	template<class _Object> static devcb_base &set_irqhandler_callback(device_t &device, _Object object) { return downcast<atari_cage_device &>(device).m_irqhandler.set_callback(object); }
 
 	// optional information overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 	void reset_w(int state);
 
@@ -58,7 +58,7 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
+	virtual void device_start() override;
 
 private:
 	cpu_device *m_cpu;
@@ -100,7 +100,7 @@ public:
 	atari_cage_seattle_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
 	// optional information overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 };
 

src/mame/audio/cclimber.h

@@ -46,8 +46,8 @@ public:
 
 protected:
 	// device level overrides
-	virtual void device_start();
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual void device_start() override;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 	void play_sample(int start,int freq,int volume);
 

src/mame/audio/channelf.h

@@ -18,11 +18,11 @@ public:
 	void sound_w(int mode);
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 private:
 	// internal state
 	sound_stream *m_channel;

src/mame/audio/cps3.h

@@ -40,10 +40,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	sound_stream *m_stream;

src/mame/audio/dai_snd.h

@@ -27,9 +27,9 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_reset();
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void device_start() override;
+	virtual void device_reset() override;
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	sound_stream *      m_mixer_channel;

src/mame/audio/dcs.h

@@ -109,8 +109,8 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 protected:
 	struct sdrc_state
@@ -220,7 +220,7 @@ public:
 	dcs_audio_2k_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
 	// optional information overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 };
 
@@ -236,7 +236,7 @@ public:
 	dcs_audio_2k_uart_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
 	// optional information overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 };
 
@@ -252,7 +252,7 @@ public:
 	dcs_audio_8k_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
 	// optional information overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 };
 
@@ -268,7 +268,7 @@ public:
 	dcs_audio_wpc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
 	// optional information overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 };
 
 // device type definition
@@ -285,7 +285,7 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
+	virtual void device_start() override;
 };
 
 // dcs2_audio_2115_device
@@ -297,7 +297,7 @@ public:
 	dcs2_audio_2115_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
 	// optional information overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 };
 
@@ -313,7 +313,7 @@ public:
 	dcs2_audio_2104_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
 	// optional information overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 };
 
@@ -329,7 +329,7 @@ public:
 	dcs2_audio_dsio_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
 	// optional information overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 };
 
@@ -345,7 +345,7 @@ public:
 	dcs2_audio_denver_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
 	// optional information overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 };
 

src/mame/audio/decobsmt.h

@@ -40,9 +40,9 @@ public:
 
 protected:
 		// device-level overrides
-		virtual void device_start();
-		virtual void device_reset();
-		virtual machine_config_constructor device_mconfig_additions() const;
+		virtual void device_start() override;
+		virtual void device_reset() override;
+		virtual machine_config_constructor device_mconfig_additions() const override;
 
 private:
 		UINT8 m_bsmt_latch;

src/mame/audio/dsbz80.h

@@ -25,7 +25,7 @@ public:
 	dsbz80_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
 	// optional information overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 	DECLARE_WRITE8_MEMBER(latch_w);
 
@@ -42,10 +42,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	mpeg_audio *decoder;

src/mame/audio/exidy.h

@@ -58,9 +58,9 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 	void common_sh_start();
 	void common_sh_reset();
@@ -69,7 +69,7 @@ protected:
 	void sh8253_register_state_globals();
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 	cpu_device *m_maincpu;
 
@@ -126,12 +126,12 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	// internal state
@@ -152,12 +152,12 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	// internal state

src/mame/audio/exidy440.h

@@ -52,12 +52,12 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
-	virtual void device_stop();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
+	virtual void device_stop() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	// internal state

src/mame/audio/galaxian.h

@@ -21,11 +21,11 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	// internal state

src/mame/audio/gottlieb.h

@@ -73,9 +73,9 @@ public:
 
 protected:
 	// device-level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual ioport_constructor device_input_ports() const;
-	virtual void device_start();
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual ioport_constructor device_input_ports() const override;
+	virtual void device_start() override;
 
 private:
 	// devices
@@ -108,9 +108,9 @@ public:
 
 protected:
 	// device-level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual ioport_constructor device_input_ports() const;
-	virtual void device_start();
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual ioport_constructor device_input_ports() const override;
+	virtual void device_start() override;
 
 private:
 	// devices
@@ -125,7 +125,7 @@ private:
 
 #if USE_FAKE_VOTRAX
 protected:
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 private:
 	void fake_votrax_data_w(UINT8 data);
 	void trigger_sample(UINT8 data);
@@ -146,8 +146,8 @@ public:
 
 protected:
 	// device-level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual ioport_constructor device_input_ports() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual ioport_constructor device_input_ports() const override;
 };
 
 
@@ -179,10 +179,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual ioport_constructor device_input_ports() const;
-	virtual void device_start();
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual ioport_constructor device_input_ports() const override;
+	virtual void device_start() override;
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 
 private:
 	// internal helpers

src/mame/audio/hyprolyb.h

@@ -21,12 +21,12 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 	private:
 	// internal state

src/mame/audio/irem.h

@@ -27,8 +27,8 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
 
 private:
 	// internal state
@@ -53,21 +53,21 @@ class m62_audio_device : public irem_audio_device
 {
 public:
 	m62_audio_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 };
 
 class m52_soundc_audio_device : public irem_audio_device
 {
 public:
 	m52_soundc_audio_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 };
 
 class m52_large_audio_device : public irem_audio_device
 {
 public:
 	m52_large_audio_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 };
 
 //MACHINE_CONFIG_EXTERN( m52_sound_c_audio );

src/mame/audio/lynx.h

@@ -39,13 +39,13 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
 
-	virtual void device_reset();
+	virtual void device_reset() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 	void reset_channel(LYNX_AUDIO *channel);
 	void shift(int chan_nr);
@@ -72,10 +72,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 };
 
 

src/mame/audio/m72.h

@@ -40,12 +40,12 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	// internal state

src/mame/audio/mea8000.h

@@ -68,8 +68,8 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 private:
 	// internal state

src/mame/audio/midway.h

@@ -87,12 +87,12 @@ public:
 
 protected:
 	// device-level overrides
-	virtual const rom_entry *device_rom_region() const;
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual ioport_constructor device_input_ports() const;
-	virtual void device_start();
-	virtual void device_reset();
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual const rom_entry *device_rom_region() const override;
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual ioport_constructor device_input_ports() const override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 
 private:
 	// internal helpers
@@ -144,10 +144,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual void device_start();
-	virtual void device_reset();
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 
 private:
 	// devices
@@ -182,10 +182,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual void device_start();
-	virtual void device_reset();
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 
 private:
 	// devices
@@ -220,10 +220,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual void device_start();
-	virtual void device_reset();
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 
 private:
 	// devices
@@ -259,10 +259,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual void device_start();
-	virtual void device_reset();
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 
 private:
 	// devices

src/mame/audio/namco52.h

@@ -49,9 +49,9 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual const rom_entry *device_rom_region() const;
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual void device_start() override;
+	virtual const rom_entry *device_rom_region() const override;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 	TIMER_CALLBACK_MEMBER( latch_callback );
 	TIMER_CALLBACK_MEMBER( irq_clear );

src/mame/audio/namco54.h

@@ -33,9 +33,9 @@ public:
 	DECLARE_WRITE8_MEMBER( write );
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual const rom_entry *device_rom_region() const;
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual void device_start() override;
+	virtual const rom_entry *device_rom_region() const override;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 	TIMER_CALLBACK_MEMBER( latch_callback );
 	TIMER_CALLBACK_MEMBER( irq_clear );

src/mame/audio/pleiads.h

@@ -54,11 +54,11 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 	void common_start();
 	inline int tone1(int samplerate);
@@ -109,11 +109,11 @@ public:
 	naughtyb_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 private:
 	// internal state
 };
@@ -126,11 +126,11 @@ public:
 	popflame_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 private:
 	// internal state
 };

src/mame/audio/redbaron.h

@@ -16,10 +16,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	INT16 *m_vol_lookup;

src/mame/audio/s11c_bg.h

@@ -50,9 +50,9 @@ public:
 
 protected:
 	// overrides
-	virtual void device_start();
-	virtual void device_reset();
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual void device_start() override;
+	virtual void device_reset() override;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 private:
 	const char* m_regiontag;

src/mame/audio/segam1audio.h

@@ -29,7 +29,7 @@ public:
 		segam1audio_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
 		// optional information overrides
-		virtual machine_config_constructor device_mconfig_additions() const;
+		virtual machine_config_constructor device_mconfig_additions() const override;
 
 		required_device<cpu_device> m_audiocpu;
 		required_device<multipcm_device> m_multipcm_1;
@@ -49,8 +49,8 @@ public:
 
 protected:
 		// device-level overrides
-		virtual void device_start();
-		virtual void device_reset();
+		virtual void device_start() override;
+		virtual void device_reset() override;
 
 private:
 	int m_to_68k[8];

src/mame/audio/segasnd.h

@@ -29,10 +29,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	// internal state
@@ -137,12 +137,12 @@ public:
 
 protected:
 	// device-level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual void device_start();
-	virtual void device_reset();
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	// internal state
@@ -181,7 +181,7 @@ public:
 
 protected:
 	// device-level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 };
 
 extern const device_type SEGAUSBROM;

src/mame/audio/seibu.h

@@ -67,8 +67,8 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 	private:
 	int m_encryption_mode;
@@ -113,10 +113,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 	private:
 	// internal state

src/mame/audio/snes_snd.h

@@ -79,12 +79,12 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 

src/mame/audio/socrates.h

@@ -19,10 +19,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 private:
 	void snd_clock();
 	static const UINT8 s_volumeLUT[];

src/mame/audio/specimx_snd.h

@@ -24,10 +24,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	sound_stream *m_mixer_channel;

src/mame/audio/svis_snd.h

@@ -113,10 +113,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 public:
 	DECLARE_WRITE8_MEMBER( sounddma_w );

src/mame/audio/t5182.h

@@ -40,11 +40,11 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
-	virtual const rom_entry *device_rom_region() const;
-	virtual ioport_constructor device_input_ports() const;
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual void device_start() override;
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
+	virtual const rom_entry *device_rom_region() const override;
+	virtual ioport_constructor device_input_ports() const override;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 private:
 	// internal state

src/mame/audio/taito_en.h

@@ -33,8 +33,8 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 private:
 	// inherited devices/pointers

src/mame/audio/taito_zm.h

@@ -31,8 +31,8 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 private:
 	// inherited devices/pointers

src/mame/audio/taitosnd.h

@@ -42,8 +42,8 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 private:
 	void update_nmi();

src/mame/audio/timeplt.h

@@ -17,11 +17,11 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	// internal state

src/mame/audio/trackfld.h

@@ -21,12 +21,12 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_config_complete();
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	// internal state

src/mame/audio/tvc_snd.h

@@ -34,10 +34,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_reset();
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void device_start() override;
+	virtual void device_reset() override;
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	static const device_timer_id TIMER_SNDINT = 0;

src/mame/audio/upd1771.h

@@ -36,11 +36,11 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	// internal state

src/mame/audio/vboy.h

@@ -82,11 +82,11 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_reset();
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual void device_start() override;
+	virtual void device_reset() override;
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 	// inline data
 	s_sreg sound_registers(void);

src/mame/audio/vc4000snd.h

@@ -26,10 +26,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 public:
 	void soundport_w(int mode, int data);

src/mame/audio/warpwarp.h

@@ -15,12 +15,12 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 
 private:
 	// internal state
@@ -58,12 +58,12 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 
 private:
 	// internal state

src/mame/audio/williams.h

@@ -68,10 +68,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual void device_start();
-	virtual void device_reset();
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 
 private:
 	// devices
@@ -114,10 +114,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual void device_start();
-	virtual void device_reset();
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 
 private:
 	// timer IDs
@@ -172,10 +172,10 @@ protected:
 	};
 
 	// device-level overrides
-	virtual machine_config_constructor device_mconfig_additions() const;
-	virtual void device_start();
-	virtual void device_reset();
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual machine_config_constructor device_mconfig_additions() const override;
+	virtual void device_start() override;
+	virtual void device_reset() override;
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 
 private:
 	// devices

src/mame/audio/wiping.h

@@ -25,10 +25,10 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
+	virtual void device_start() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 private:
 	// internal state

src/mame/audio/wpcsnd.h

@@ -56,9 +56,9 @@ public:
 
 protected:
 	// overrides
-	virtual void device_start();
-	virtual void device_reset();
-	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual void device_start() override;
+	virtual void device_reset() override;
+	virtual machine_config_constructor device_mconfig_additions() const override;
 
 private:
 	const char* m_regiontag;

src/mame/audio/wswan_snd.h

@@ -49,11 +49,11 @@ public:
 
 protected:
 	// device-level overrides
-	virtual void device_start();
-	virtual void device_reset();
+	virtual void device_start() override;
+	virtual void device_reset() override;
 
 	// sound stream update overrides
-	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
 
 public:
 	DECLARE_WRITE8_MEMBER( port_w );

src/mame/drivers/1945kiii.cpp

@@ -79,8 +79,8 @@ public:
 	DECLARE_WRITE16_MEMBER(k3_scrolly_w);
 	DECLARE_WRITE16_MEMBER(k3_soundbanks_w);
 	TILE_GET_INFO_MEMBER(get_k3_bg_tile_info);
-	virtual void machine_start();
-	virtual void video_start();
+	virtual void machine_start() override;
+	virtual void video_start() override;
 	void draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect);
 	UINT32 screen_update_k3(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	required_device<cpu_device> m_maincpu;

src/mame/drivers/24cdjuke.cpp

@@ -77,8 +77,8 @@ public:
 	required_ioport m_io_row3;
 	required_region_ptr<UINT16> m_charset;
 
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 
 	DECLARE_READ8_MEMBER(kb_row_r);
 	DECLARE_WRITE8_MEMBER(kb_col_w);

src/mame/drivers/30test.cpp

@@ -68,8 +68,8 @@ public:
 	DECLARE_WRITE8_MEMBER(hc11_mux_w);
 	DECLARE_READ8_MEMBER(hc11_okibank_r);
 	DECLARE_WRITE8_MEMBER(hc11_okibank_w);
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 	required_device<cpu_device> m_maincpu;
 	required_device<okim6295_device> m_oki;
 };

src/mame/drivers/39in1.cpp

@@ -80,7 +80,7 @@ public:
 	DECLARE_READ32_MEMBER(prot_cheater_r);
 	DECLARE_DRIVER_INIT(39in1);
 	DECLARE_MACHINE_START(60in1);
-	virtual void machine_start();
+	virtual void machine_start() override;
 	UINT32 screen_update_39in1(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
 	INTERRUPT_GEN_MEMBER(pxa255_vblank_start);
 	TIMER_CALLBACK_MEMBER(pxa255_dma_dma_end);

src/mame/drivers/3x3puzzl.cpp

@@ -95,9 +95,9 @@ public:
 	DECLARE_WRITE16_MEMBER(tilemap1_scrolly_w);
 
 protected:
-	virtual void video_start();
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void video_start() override;
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 };
 
 

src/mame/drivers/4004clk.cpp

@@ -32,7 +32,7 @@ public:
 	DECLARE_WRITE8_MEMBER( relays_w );
 	UINT16 m_nixie[16];
 	UINT8 m_timer;
-	virtual void machine_start();
+	virtual void machine_start() override;
 	TIMER_DEVICE_CALLBACK_MEMBER(timer_callback);
 	UINT8 nixie_to_num(UINT16 val);
 	inline void output_set_nixie_value(int index, int value);

src/mame/drivers/4enlinea.cpp

@@ -228,8 +228,8 @@ public:
 	UINT8 m_serial_flags;
 	UINT8 m_serial_data[2];
 
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 	required_device<cpu_device> m_maincpu;
 
 };
@@ -248,8 +248,8 @@ public:
 
 	DECLARE_READ8_MEMBER( _4enlinea_io_read );
 	DECLARE_WRITE8_MEMBER( _4enlinea_mode_control_w );
-	virtual void device_start();
-	virtual const rom_entry *device_rom_region() const;
+	virtual void device_start() override;
+	virtual const rom_entry *device_rom_region() const override;
 };
 
 const rom_entry *isa8_cga_4enlinea_device::device_rom_region() const

src/mame/drivers/5clown.cpp

@@ -500,8 +500,8 @@ public:
 	DECLARE_WRITE8_MEMBER(fclown_ay8910_w);
 	DECLARE_DRIVER_INIT(fclown);
 	TILE_GET_INFO_MEMBER(get_fclown_tile_info);
-	virtual void machine_start();
-	virtual void video_start();
+	virtual void machine_start() override;
+	virtual void video_start() override;
 	DECLARE_PALETTE_INIT(_5clown);
 	UINT32 screen_update_fclown(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 };

src/mame/drivers/a1supply.cpp

@@ -52,10 +52,10 @@ public:
 protected:
 
 	// driver_device overrides
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 
-	virtual void video_start();
+	virtual void video_start() override;
 
 private:
 

src/mame/drivers/a310.cpp

@@ -86,8 +86,8 @@ public:
 	DECLARE_WRITE_LINE_MEMBER(a310_wd177x_intrq_w);
 	DECLARE_WRITE_LINE_MEMBER(a310_wd177x_drq_w);
 	DECLARE_DRIVER_INIT(a310);
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 	DECLARE_INPUT_CHANGED_MEMBER(key_stroke);
 	DECLARE_FLOPPY_FORMATS( floppy_formats );
 

src/mame/drivers/a5105.cpp

@@ -81,8 +81,8 @@ public:
 	UINT16 m_pcg_internal_addr;
 	UINT8 m_key_mux;
 	UINT8 m_memsel[4];
-	virtual void machine_reset();
-	virtual void video_start();
+	virtual void machine_reset() override;
+	virtual void video_start() override;
 	DECLARE_PALETTE_INIT(a5105);
 	DECLARE_FLOPPY_FORMATS( floppy_formats );
 	required_device<ram_device> m_ram;

src/mame/drivers/a51xx.cpp

@@ -22,8 +22,8 @@ public:
 		: driver_device(mconfig, type, tag) ,
 		m_maincpu(*this, "maincpu") { }
 
-	virtual void machine_reset();
-	virtual void video_start();
+	virtual void machine_reset() override;
+	virtual void video_start() override;
 	DECLARE_MACHINE_RESET(a5130);
 	DECLARE_VIDEO_START(a5130);
 	UINT32 screen_update_a5120(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);

src/mame/drivers/a7150.cpp

@@ -21,8 +21,8 @@ public:
 		: driver_device(mconfig, type, tag) ,
 		m_maincpu(*this, "maincpu") { }
 
-	virtual void machine_reset();
-	virtual void video_start();
+	virtual void machine_reset() override;
+	virtual void video_start() override;
 	UINT32 screen_update_a7150(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	required_device<cpu_device> m_maincpu;
 };

src/mame/drivers/a7800.cpp

@@ -142,8 +142,8 @@ public:
 	DECLARE_WRITE8_MEMBER(maria_w);
 	DECLARE_DRIVER_INIT(a7800_pal);
 	DECLARE_DRIVER_INIT(a7800_ntsc);
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 	DECLARE_PALETTE_INIT(a7800);
 	DECLARE_PALETTE_INIT(a7800p);
 	TIMER_DEVICE_CALLBACK_MEMBER(interrupt);

src/mame/drivers/ace.cpp

@@ -76,9 +76,9 @@ public:
 	DECLARE_WRITE8_MEMBER(ace_characterram_w);
 	DECLARE_WRITE8_MEMBER(ace_scoreram_w);
 	DECLARE_READ8_MEMBER(unk_r);
-	virtual void machine_start();
-	virtual void machine_reset();
-	virtual void video_start();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
+	virtual void video_start() override;
 	UINT32 screen_update_ace(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	void ace_postload();
 };

src/mame/drivers/acefruit.cpp

@@ -47,7 +47,7 @@ public:
 	DECLARE_CUSTOM_INPUT_MEMBER(starspnr_coinage_r);
 	DECLARE_CUSTOM_INPUT_MEMBER(starspnr_payout_r);
 	DECLARE_DRIVER_INIT(sidewndr);
-	virtual void video_start();
+	virtual void video_start() override;
 	DECLARE_PALETTE_INIT(acefruit);
 	UINT32 screen_update_acefruit(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	INTERRUPT_GEN_MEMBER(acefruit_vblank);
@@ -59,7 +59,7 @@ public:
 	};
 
 protected:
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 };
 
 

src/mame/drivers/aces1.cpp

@@ -229,8 +229,8 @@ public:
 	required_ioport m_io8_port;
 
 	DECLARE_DRIVER_INIT(aces1);
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 	TIMER_CALLBACK_MEMBER(m_aces1_irq_timer_callback);
 	TIMER_CALLBACK_MEMBER(m_aces1_nmi_timer_callback);
 };

src/mame/drivers/acommand.cpp

@@ -98,7 +98,7 @@ public:
 	TILEMAP_MAPPER_MEMBER(bg_scan);
 	TILE_GET_INFO_MEMBER(ac_get_bg_tile_info);
 	TILE_GET_INFO_MEMBER(ac_get_tx_tile_info);
-	virtual void video_start();
+	virtual void video_start() override;
 	UINT32 screen_update_acommand(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	TIMER_DEVICE_CALLBACK_MEMBER(acommand_scanline);
 	void draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect, int priority, int pri_mask);

src/mame/drivers/age_candy.cpp

@@ -23,8 +23,8 @@ public:
 	//	,m_maincpu(*this, "maincpu")
 	{ }
 
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 
 //	required_device<mcs51_cpu_device> m_maincpu;
 };

src/mame/drivers/albazc.cpp

@@ -37,7 +37,7 @@ public:
 	DECLARE_WRITE8_MEMBER(hanaroku_out_1_w);
 	DECLARE_WRITE8_MEMBER(hanaroku_out_2_w);
 	DECLARE_WRITE8_MEMBER(albazc_vregs_w);
-	virtual void video_start();
+	virtual void video_start() override;
 	DECLARE_PALETTE_INIT(albazc);
 	UINT32 screen_update_hanaroku(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	void draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect);

src/mame/drivers/albazg.cpp

@@ -75,9 +75,9 @@ public:
 	DECLARE_WRITE8_MEMBER(mux_w);
 	DECLARE_WRITE8_MEMBER(yumefuda_output_w);
 	TILE_GET_INFO_MEMBER(y_get_bg_tile_info);
-	virtual void machine_start();
-	virtual void machine_reset();
-	virtual void video_start();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
+	virtual void video_start() override;
 	UINT32 screen_update_yumefuda(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	required_device<cpu_device> m_maincpu;
 	required_device<gfxdecode_device> m_gfxdecode;

src/mame/drivers/aleisttl.cpp

@@ -63,10 +63,10 @@ public:
 protected:
 
 	// driver_device overrides
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 
-	virtual void video_start();
+	virtual void video_start() override;
 
 private:
 

src/mame/drivers/alg.cpp

@@ -60,7 +60,7 @@ public:
 
 protected:
 	// amiga_state overrides
-	virtual void potgo_w(UINT16 data);
+	virtual void potgo_w(UINT16 data) override;
 	int get_lightgun_pos(int player, int *x, int *y);
 
 private:

src/mame/drivers/alien.cpp

@@ -39,8 +39,8 @@ protected:
 	required_device<cpu_device> m_maincpu;
 
 	// driver_device overrides
-	virtual void machine_reset();
-	virtual void video_start();
+	virtual void machine_reset() override;
+	virtual void video_start() override;
 };
 
 void alien_state::video_start()

src/mame/drivers/alinvade.cpp

@@ -44,8 +44,8 @@ public:
 private:
 	UINT8 m_irqmask;
 	UINT8 m_irqff;
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 	required_device<cpu_device> m_maincpu;
 	required_shared_ptr<UINT8> m_videoram;
 	required_device<discrete_device> m_discrete;

src/mame/drivers/allied.cpp

@@ -94,7 +94,7 @@ private:
 	UINT8 m_ic6a2;
 	UINT8 m_ic6b4;
 	UINT8 m_ic6b7;
-	virtual void machine_reset();
+	virtual void machine_reset() override;
 	required_device<m6504_device> m_maincpu;
 	required_device<pia6821_device> m_ic1;
 	required_device<pia6821_device> m_ic2;

src/mame/drivers/alphasma.cpp

@@ -43,8 +43,8 @@ public:
 	required_ioport_array<16> m_keyboard;
 	required_ioport m_battery_status;
 
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 	DECLARE_PALETTE_INIT(alphasmart);
 	virtual UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 

src/mame/drivers/alphatro.cpp

@@ -89,10 +89,10 @@ private:
 	bool m_cass_state;
 	bool m_cassold;
 	emu_timer* m_sys_timer;
-	virtual void video_start();
-	virtual void machine_start();
-	virtual void machine_reset();
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual void video_start() override;
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 	required_device<cpu_device> m_maincpu;
 	required_device<mc6845_device> m_crtc;
 	required_device<i8251_device> m_usart;

src/mame/drivers/altair.cpp

@@ -40,7 +40,7 @@ public:
 	DECLARE_WRITE_LINE_MEMBER(write_acia_clock);
 
 protected:
-	virtual void machine_reset();
+	virtual void machine_reset() override;
 
 private:
 	required_device<cpu_device> m_maincpu;

src/mame/drivers/altos5.cpp

@@ -64,7 +64,7 @@ private:
 	floppy_image_device *m_floppy;
 	UINT8 convert(offs_t offset, bool state);
 	void setup_banks(UINT8 source);
-	virtual void machine_reset();
+	virtual void machine_reset() override;
 	required_device<cpu_device> m_maincpu;
 	required_device<z80pio_device> m_pio0;
 	required_device<z80pio_device> m_pio1;

src/mame/drivers/alvg.cpp

@@ -18,7 +18,7 @@ protected:
 	required_device<cpu_device> m_maincpu;
 
 	// driver_device overrides
-	virtual void machine_reset();
+	virtual void machine_reset() override;
 public:
 	DECLARE_DRIVER_INIT(alvg);
 };

src/mame/drivers/amaticmg.cpp

@@ -451,9 +451,9 @@ public:
 	DECLARE_DRIVER_INIT(ama8000_2_i);
 	DECLARE_DRIVER_INIT(ama8000_2_v);
 	DECLARE_DRIVER_INIT(ama8000_1_x);
-	virtual void machine_start();
-	virtual void machine_reset();
-	virtual void video_start();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
+	virtual void video_start() override;
 	DECLARE_PALETTE_INIT(amaticmg);
 	DECLARE_PALETTE_INIT(amaticmg2);
 	UINT32 screen_update_amaticmg(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);

src/mame/drivers/amerihok.cpp

@@ -27,8 +27,8 @@ public:
 	//	,m_maincpu(*this, "maincpu")
 	{ }
 
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 
 //	required_device<mcs51_cpu_device> m_maincpu;
 };

src/mame/drivers/amico2k.cpp

@@ -43,7 +43,7 @@ public:
 		: driver_device(mconfig, type, tag) ,
 		m_maincpu(*this, "maincpu") { }
 
-	void machine_start();
+	void machine_start() override;
 
 	DECLARE_READ8_MEMBER( ppi_pa_r );
 	DECLARE_WRITE8_MEMBER( ppi_pa_w );

src/mame/drivers/amiga.cpp

@@ -44,8 +44,8 @@ public:
 	DECLARE_WRITE16_MEMBER( write_protect_w );
 
 protected:
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 
 private:
 	required_device<address_map_bank_device> m_bootrom;
@@ -74,11 +74,11 @@ public:
 	DECLARE_WRITE16_MEMBER( clock_w );
 
 protected:
-	virtual void machine_reset();
+	virtual void machine_reset() override;
 
 	// amiga_state overrides
-	virtual bool int2_pending();
-	virtual bool int6_pending();
+	virtual bool int2_pending() override;
+	virtual bool int6_pending() override;
 
 private:
 	// devices
@@ -104,11 +104,11 @@ public:
 	DECLARE_DRIVER_INIT( ntsc );
 
 protected:
-	virtual void machine_reset();
+	virtual void machine_reset() override;
 
 	// amiga_state overrides
-	virtual bool int2_pending();
-	virtual bool int6_pending();
+	virtual bool int2_pending() override;
+	virtual bool int6_pending() override;
 
 private:
 	// devices
@@ -149,11 +149,11 @@ public:
 
 protected:
 	// driver_device overrides
-	virtual void machine_start();
+	virtual void machine_start() override;
 
 	// amiga_state overrides
-	virtual bool int2_pending();
-	virtual bool int6_pending();
+	virtual bool int2_pending() override;
+	virtual bool int6_pending() override;
 
 private:
 	// devices
@@ -205,11 +205,11 @@ public:
 	DECLARE_DRIVER_INIT( ntsc );
 
 protected:
-	virtual void machine_reset();
+	virtual void machine_reset() override;
 
 	// amiga_state overrides
-	virtual bool int2_pending();
-	virtual bool int6_pending();
+	virtual bool int2_pending() override;
+	virtual bool int6_pending() override;
 
 private:
 	// devices
@@ -237,7 +237,7 @@ public:
 	static const UINT8 GAYLE_ID = 0xd0;
 
 protected:
-	virtual bool int2_pending();
+	virtual bool int2_pending() override;
 
 private:
 	int m_gayle_int2;
@@ -259,7 +259,7 @@ public:
 	static const UINT8 GAYLE_ID = 0xd1;
 
 protected:
-	virtual bool int2_pending();
+	virtual bool int2_pending() override;
 
 private:
 	int m_gayle_int2;
@@ -328,7 +328,7 @@ public:
 
 protected:
 	// amiga_state overrides
-	virtual void potgo_w(UINT16 data);
+	virtual void potgo_w(UINT16 data) override;
 
 private:
 	required_device<cdda_device> m_cdda;

src/mame/drivers/amusco.cpp

@@ -96,7 +96,7 @@ public:
 	tilemap_t *m_bg_tilemap;
 	DECLARE_WRITE16_MEMBER(amusco_videoram_w);
 	TILE_GET_INFO_MEMBER(get_bg_tile_info);
-	virtual void video_start();
+	virtual void video_start() override;
 	DECLARE_READ8_MEMBER(mc6845_r);
 	DECLARE_WRITE8_MEMBER(mc6845_w);
 	DECLARE_WRITE16_MEMBER(vram_w);

src/mame/drivers/amust.cpp

@@ -136,7 +136,7 @@ private:
 	UINT8 m_port08;
 	UINT8 m_port0a;
 	UINT8 m_term_data;
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 	required_device<cpu_device> m_maincpu;
 	required_device<beep_device> m_beep;
 	required_device<upd765a_device> m_fdc;

src/mame/drivers/apc.cpp

@@ -153,10 +153,10 @@ public:
 
 protected:
 	// driver_device overrides
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 
-	virtual void video_start();
+	virtual void video_start() override;
 	inline void set_dma_channel(int channel, int state);
 };
 

src/mame/drivers/apexc.cpp

@@ -34,8 +34,8 @@ public:
 	int m_letters;
 	int m_pos;
 	DECLARE_DRIVER_INIT(apexc);
-	virtual void machine_start();
-	virtual void video_start();
+	virtual void machine_start() override;
+	virtual void video_start() override;
 	DECLARE_PALETTE_INIT(apexc);
 	UINT32 screen_update_apexc(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	INTERRUPT_GEN_MEMBER(apexc_interrupt);
@@ -77,23 +77,23 @@ public:
 	apexc_cylinder_image_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
 	// image-level overrides
-	virtual iodevice_t image_type() const { return IO_CYLINDER; }
+	virtual iodevice_t image_type() const override { return IO_CYLINDER; }
 
-	virtual bool is_readable()  const { return 1; }
-	virtual bool is_writeable() const { return 1; }
-	virtual bool is_creatable() const { return 0; }
-	virtual bool must_be_loaded() const { return 0; }
-	virtual bool is_reset_on_load() const { return 1; }
-	virtual const char *image_interface() const { return nullptr; }
-	virtual const char *file_extensions() const { return "apc"; }
-	virtual const option_guide *create_option_guide() const { return nullptr; }
+	virtual bool is_readable()  const override { return 1; }
+	virtual bool is_writeable() const override { return 1; }
+	virtual bool is_creatable() const override { return 0; }
+	virtual bool must_be_loaded() const override { return 0; }
+	virtual bool is_reset_on_load() const override { return 1; }
+	virtual const char *image_interface() const override { return nullptr; }
+	virtual const char *file_extensions() const override { return "apc"; }
+	virtual const option_guide *create_option_guide() const override { return nullptr; }
 
-	virtual bool call_load();
-	virtual void call_unload();
+	virtual bool call_load() override;
+	virtual void call_unload() override;
 protected:
 	// device-level overrides
-	virtual void device_config_complete() { update_names(); }
-	virtual void device_start() { }
+	virtual void device_config_complete() override { update_names(); }
+	virtual void device_start() override { }
 private:
 	int m_writable;
 };
@@ -206,20 +206,20 @@ public:
 	apexc_tape_puncher_image_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
 	// image-level overrides
-	virtual iodevice_t image_type() const { return IO_PUNCHTAPE; }
+	virtual iodevice_t image_type() const override { return IO_PUNCHTAPE; }
 
-	virtual bool is_readable()  const { return 0; }
-	virtual bool is_writeable() const { return 1; }
-	virtual bool is_creatable() const { return 1; }
-	virtual bool must_be_loaded() const { return 0; }
-	virtual bool is_reset_on_load() const { return 0; }
-	virtual const char *image_interface() const { return nullptr; }
-	virtual const char *file_extensions() const { return "tap"; }
-	virtual const option_guide *create_option_guide() const { return nullptr; }
+	virtual bool is_readable()  const override { return 0; }
+	virtual bool is_writeable() const override { return 1; }
+	virtual bool is_creatable() const override { return 1; }
+	virtual bool must_be_loaded() const override { return 0; }
+	virtual bool is_reset_on_load() const override { return 0; }
+	virtual const char *image_interface() const override { return nullptr; }
+	virtual const char *file_extensions() const override { return "tap"; }
+	virtual const option_guide *create_option_guide() const override { return nullptr; }
 protected:
 	// device-level overrides
-	virtual void device_config_complete() { update_names(); }
-	virtual void device_start() { }
+	virtual void device_config_complete() override { update_names(); }
+	virtual void device_start() override { }
 };
 
 const device_type APEXC_TAPE_PUNCHER = &device_creator<apexc_tape_puncher_image_device>;
@@ -240,20 +240,20 @@ public:
 	apexc_tape_reader_image_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 
 	// image-level overrides
-	virtual iodevice_t image_type() const { return IO_PUNCHTAPE; }
+	virtual iodevice_t image_type() const override { return IO_PUNCHTAPE; }
 
-	virtual bool is_readable()  const { return 1; }
-	virtual bool is_writeable() const { return 0; }
-	virtual bool is_creatable() const { return 0; }
-	virtual bool must_be_loaded() const { return 0; }
-	virtual bool is_reset_on_load() const { return 0; }
-	virtual const char *image_interface() const { return nullptr; }
-	virtual const char *file_extensions() const { return "tap"; }
-	virtual const option_guide *create_option_guide() const { return nullptr; }
+	virtual bool is_readable()  const override { return 1; }
+	virtual bool is_writeable() const override { return 0; }
+	virtual bool is_creatable() const override { return 0; }
+	virtual bool must_be_loaded() const override { return 0; }
+	virtual bool is_reset_on_load() const override { return 0; }
+	virtual const char *image_interface() const override { return nullptr; }
+	virtual const char *file_extensions() const override { return "tap"; }
+	virtual const option_guide *create_option_guide() const override { return nullptr; }
 protected:
 	// device-level overrides
-	virtual void device_config_complete() { update_names(); }
-	virtual void device_start() { }
+	virtual void device_config_complete() override { update_names(); }
+	virtual void device_start() override { }
 };
 
 const device_type APEXC_TAPE_READER = &device_creator<apexc_tape_reader_image_device>;

src/mame/drivers/apf.cpp

@@ -124,8 +124,8 @@ private:
 	UINT8 m_portb;
 	bool m_ca2;
 	bool m_has_cart_ram;
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 	required_device<m6800_cpu_device> m_maincpu;
 	optional_device<ram_device> m_ram;
 	required_device<mc6847_base_device> m_crtc;

src/mame/drivers/apple2.cpp

@@ -132,8 +132,8 @@ public:
 	TIMER_DEVICE_CALLBACK_MEMBER(apple2_interrupt);
 	TIMER_DEVICE_CALLBACK_MEMBER(ay3600_repeat);
 
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 
 	DECLARE_PALETTE_INIT(apple2);
 	UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);

src/mame/drivers/apple2e.cpp

@@ -265,8 +265,8 @@ public:
 	TIMER_DEVICE_CALLBACK_MEMBER(apple2_interrupt);
 	TIMER_DEVICE_CALLBACK_MEMBER(ay3600_repeat);
 
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 
 	DECLARE_PALETTE_INIT(apple2);
 	UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);

src/mame/drivers/applix.cpp

@@ -133,8 +133,8 @@ public:
 	MC6845_UPDATE_ROW(crtc_update_row);
 	UINT8 m_video_latch;
 	UINT8 m_pa;
-	virtual void machine_reset();
-	virtual void video_start();
+	virtual void machine_reset() override;
+	virtual void video_start() override;
 	DECLARE_PALETTE_INIT(applix);
 	UINT8 m_palette_latch[4];
 	required_shared_ptr<UINT16> m_base;

src/mame/drivers/apricot.cpp

@@ -89,7 +89,7 @@ public:
 	UINT32 screen_update_apricot(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
 
 protected:
-	virtual void machine_start();
+	virtual void machine_start() override;
 
 private:
 	required_device<i8086_cpu_device> m_cpu;

src/mame/drivers/apricotf.cpp

@@ -77,7 +77,7 @@ public:
 
 	DECLARE_FLOPPY_FORMATS(floppy_formats);
 
-	virtual void machine_start();
+	virtual void machine_start() override;
 
 	required_device<cpu_device> m_maincpu;
 	required_device<z80ctc_device> m_ctc;

src/mame/drivers/apricotp.cpp

@@ -118,10 +118,10 @@ public:
 	floppy_image_device *m_floppy;
 	required_device<centronics_device> m_centronics;
 
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 
-	virtual void video_start();
+	virtual void video_start() override;
 	UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 
 	MC6845_UPDATE_ROW(update_row);

src/mame/drivers/arachnid.cpp

@@ -90,7 +90,7 @@ public:
 	required_device<pia6821_device> m_pia_u17;
 	required_device<speaker_sound_device> m_speaker;
 
-	virtual void machine_start();
+	virtual void machine_start() override;
 	DECLARE_READ8_MEMBER( pia_u4_pa_r );
 	DECLARE_READ8_MEMBER( pia_u4_pb_r );
 	DECLARE_READ_LINE_MEMBER( pia_u4_pca_r );

src/mame/drivers/argo.cpp

@@ -51,13 +51,13 @@ public:
 	UINT8 m_p_cursor_pos;
 	bool m_ram_ctrl;
 	UINT8 m_scroll_ctrl;
-	virtual void machine_reset();
-	virtual void video_start();
+	virtual void machine_reset() override;
+	virtual void video_start() override;
 	UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 	DECLARE_DRIVER_INIT(argo);
 
 protected:
-	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 };
 
 // write to videoram if following 'out b9,61' otherwise write to the unknown 'extra' ram

src/mame/drivers/aristmk4.cpp

@@ -411,9 +411,9 @@ public:
 	DECLARE_READ8_MEMBER(pb1_r);
 	DECLARE_READ8_MEMBER(pc1_r);
 	DECLARE_DRIVER_INIT(aristmk4);
-	virtual void machine_start();
-	virtual void machine_reset();
-	virtual void video_start();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
+	virtual void video_start() override;
 	DECLARE_PALETTE_INIT(aristmk4);
 	DECLARE_PALETTE_INIT(lions);
 	UINT32 screen_update_aristmk4(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);

src/mame/drivers/aristmk5.cpp

@@ -192,8 +192,8 @@ public:
 	DECLARE_READ32_MEMBER(Ns5r50);
 	DECLARE_WRITE32_MEMBER(sram_banksel_w);
 	DECLARE_DRIVER_INIT(aristmk5);
-	virtual void machine_start();
-	virtual void machine_reset();
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
 	TIMER_CALLBACK_MEMBER(mk5_VSYNC_callback);
 	TIMER_CALLBACK_MEMBER(mk5_2KHz_callback);
 };

src/mame/drivers/aristmk6.cpp

@@ -44,7 +44,7 @@ public:
 	DECLARE_READ8_MEMBER(test_r);
 	DECLARE_WRITE64_MEMBER(eeprom_w);
 	DECLARE_READ64_MEMBER(hwver_r);
-	virtual void video_start();
+	virtual void video_start() override;
 	UINT32 screen_update_aristmk6(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
 	required_device<cpu_device> m_maincpu;
 	required_device<ns16550_device> m_uart0;

src/mame/drivers/arsystems.cpp

@@ -90,7 +90,7 @@ public:
 	inline void generic_decode(const char *tag, int bit7, int bit6, int bit5, int bit4, int bit3, int bit2, int bit1, int bit0);
 
 protected:
-	virtual void machine_reset();
+	virtual void machine_reset() override;
 };
 
 

src/mame/drivers/asst128.cpp

@@ -18,7 +18,7 @@ public:
 
 protected:
 	// device-level overrides
-	void device_start();
+	void device_start() override;
 };
 
 void asst128_mb_device::device_start()
@@ -53,7 +53,7 @@ public:
 	DECLARE_FLOPPY_FORMATS( asst128_formats );
 	DECLARE_WRITE8_MEMBER(asst128_fdc_dor_w);
 
-	void machine_start();
+	void machine_start() override;
 };
 
 void asst128_state::machine_start()