8080bw, atari_s1, hanaawas, lastfght, mw8080bw: initialized some variables which were causing incorrect behaviours in drvnoclear builds

src/mame/drivers/8080bw.cpp

@@ -1976,6 +1976,8 @@ MACHINE_START_MEMBER(_8080bw_state,polaris)
 	save_pointer(&m_scattered_colorram[0], "m_scattered_colorram", 0x800);
 	save_item(NAME(m_polaris_cloud_speed));
 	save_item(NAME(m_polaris_cloud_pos));
+
+	m_polaris_cloud_pos = m_polaris_cloud_speed = 0;
 }
 
 uint8_t _8080bw_state::polaris_port00_r()

src/mame/drivers/atari_s1.cpp

@@ -55,6 +55,8 @@ ToDo:
 #include "atari_s1.lh"
 
 
+namespace {
+
 #define MASTER_CLK XTAL(4'000'000) / 4
 #define DMA_CLK MASTER_CLK / 2
 #define AUDIO_CLK DMA_CLK / 4
@@ -78,6 +80,10 @@ public:
 	void atari_s1(machine_config &config);
 	void atarians(machine_config &config);
 
+protected:
+	virtual void machine_reset() override;
+	virtual void machine_start() override { m_digits.resolve(); }
+
 private:
 	uint8_t m1080_r();
 	void m1080_w(uint8_t data);
@@ -109,8 +115,6 @@ private:
 	uint8_t m_out_offs;
 	uint8_t m_t_c;
 	uint8_t *m_p_prom;
-	virtual void machine_reset() override;
-	virtual void machine_start() override { m_digits.resolve(); }
 	required_device<cpu_device> m_maincpu;
 	required_shared_ptr<uint8_t> m_p_ram;
 	required_device<dac_4bit_r2r_device> m_dac;
@@ -447,6 +451,8 @@ void atari_s1_state::machine_reset()
 	m_dac->set_output_gain(0, 0);
 	m_t_c = 0;
 	m_audiores = 0;
+	m_bit6 = 0;
+	m_out_offs = 0;
 }
 
 void atari_s1_state::atari_s1(machine_config &config)
@@ -551,6 +557,8 @@ ROM_START(spcrider)
 	ROM_LOAD("82s130.bin", 0x0000, 0x0200, CRC(da1f77b4) SHA1(b21fdc1c6f196c320ec5404013d672c35f95890b))
 ROM_END
 
+} // Anonymous namespace
+
 
 GAME( 1976, atarians,  0,        atarians, atari_s1, atari_s1_state, empty_init, ROT0, "Atari", "The Atarians",             MACHINE_MECHANICAL | MACHINE_NOT_WORKING | MACHINE_IMPERFECT_SOUND)
 GAME( 1977, time2000,  0,        atari_s1, atari_s1, atari_s1_state, empty_init, ROT0, "Atari", "Time 2000",                MACHINE_MECHANICAL | MACHINE_NOT_WORKING | MACHINE_IMPERFECT_SOUND)

src/mame/drivers/hanaawas.cpp

@@ -213,6 +213,7 @@ void hanaawas_state::machine_start()
 void hanaawas_state::machine_reset()
 {
 	m_mux = 0;
+	m_coin_impulse = 0;
 }
 
 void hanaawas_state::hanaawas(machine_config &config)

src/mame/drivers/lastfght.cpp

@@ -42,7 +42,7 @@ Notes:
       EPM7032 - Altera EPM7032LC44-15T CPLD (PLCC44)
      CXK58257 - Sony CXK58257 32k x8 SRAM (SOP28)
     KM428C256 - Samsung Semiconductor KM428C256 256k x8 Dual Port DRAM (SOJ40)
-     ULKN2003 - Toshiba ULN2003 High Voltage High Current Darlington Transistor Array comprising 7 NPN Darlinton pairs (DIP16)
+     ULKN2003 - Toshiba ULN2003 High Voltage High Current Darlington Transistor Array comprising 7 NPN Darlington pairs (DIP16)
       HM86171 - Hualon Microelectronics HMC HM86171 VGA 256 colour RAMDAC (DIP28)
       3V_BATT - 3 Volt Coin Battery. This is tied to the CXK58257 SRAM. It appears to be used as an EEPROM, as the game
                 has on-board settings in test mode and there's no DIPs and no EEPROM.
@@ -72,6 +72,8 @@ Notes:
 #include "screen.h"
 
 
+namespace {
+
 class lastfght_state : public driver_device
 {
 public:
@@ -86,6 +88,11 @@ public:
 
 	void init_lastfght();
 
+protected:
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
+	virtual void video_start() override;
+
 private:
 	/* memory */
 	void hi_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
@@ -110,10 +117,6 @@ private:
 	void lastfght_map(address_map &map);
 	void ramdac_map(address_map &map);
 
-	virtual void machine_start() override;
-	virtual void machine_reset() override;
-	virtual void video_start() override;
-
 	/* video-related */
 	bitmap_ind16 m_bitmap[2];
 	int m_dest;
@@ -131,8 +134,8 @@ private:
 	int m_w;
 	int m_h;
 #ifdef MAME_DEBUG
-	unsigned m_base;
-	int m_view_roms;
+	unsigned m_base = 0;
+	int m_view_roms = 0;
 #endif
 
 	/* misc */
@@ -603,4 +606,7 @@ void lastfght_state::init_lastfght()
 	rom[0x01b86 / 2] = 0x5670;
 }
 
+} // Anonymous namespace
+
+
 GAME( 2000, lastfght, 0, lastfght, lastfght, lastfght_state, init_lastfght, ROT0, "Subsino", "Last Fighting", MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE )

src/mame/drivers/mw8080bw.cpp

@@ -2209,6 +2209,8 @@ MACHINE_START_MEMBER(mw8080bw_state,phantom2)
 
 	/* setup for save states */
 	save_item(NAME(m_phantom2_cloud_counter));
+
+	m_phantom2_cloud_counter = 0;
 }
 
 

src/mame/includes/8080bw.h

@@ -91,6 +91,7 @@ public:
 	DECLARE_READ_LINE_MEMBER(claybust_gun_on_r);
 
 protected:
+	virtual void video_start() override { m_color_map = m_screen_red = m_flip_screen = 0; }
 	void clear_extra_columns( bitmap_rgb32 &bitmap, int color );
 	inline void set_8_pixels( bitmap_rgb32 &bitmap, uint8_t y, uint8_t x, uint8_t data, int fore_color, int back_color );