astrocde, drw80pkr, fm7, hp9845, igs011, mc1000, nmk16, ti99_8, williams, xor100: initialized some variables which were causing asserts / crashes / regressions in drvnoclear builds

src/mame/drivers/drw80pkr.cpp

@@ -39,6 +39,8 @@
 #include "tilemap.h"
 
 
+namespace {
+
 class drw80pkr_state : public driver_device
 {
 public:
@@ -105,6 +107,8 @@ private:
 void drw80pkr_state::machine_start()
 {
 	subdevice<nvram_device>("nvram")->set_base(m_pkr_io_ram, sizeof(m_pkr_io_ram));
+
+	m_active_bank = 0;
 }
 
 /*****************
@@ -502,6 +506,8 @@ ROM_START( drw80pk2 )
 	ROM_LOAD( "cap13.u92", 0x0000, 0x0100, CRC(be67a8d9) SHA1(24b8cd19a5ec09779a737f6fc8c07b44f1226c8f) )
 ROM_END
 
+} // Anonymous namespace
+
 /*************************
 *      Game Drivers      *
 *************************/

src/mame/drivers/fm7.cpp

@@ -1875,6 +1875,7 @@ void fm7_state::init_fm7()
 	m_subtimer = timer_alloc(TIMER_FM7_SUBTIMER_IRQ);
 	m_keyboard_timer = timer_alloc(TIMER_FM7_KEYBOARD_POLL);
 	m_fm77av_vsync_timer = timer_alloc(TIMER_FM77AV_VSYNC);
+	m_init_rom_en = 0;
 }
 
 MACHINE_START_MEMBER(fm7_state,fm7)

src/mame/drivers/igs011.cpp

@@ -77,6 +77,8 @@ Notes:
 #include "speaker.h"
 
 
+namespace {
+
 class igs011_state : public driver_device
 {
 public:
@@ -618,6 +620,8 @@ void igs011_state::igs011_blit_flags_w(offs_t offset, u16 data, u16 mem_mask)
 
 void igs011_state::machine_start()
 {
+	m_prot1_addr = 0;
+
 	save_item(NAME(m_igs_dips_sel));
 	save_item(NAME(m_igs_input_sel));
 	save_item(NAME(m_igs_hopper));
@@ -4905,6 +4909,8 @@ ROM_START( xymg )
 	ROM_CONTINUE(          0x00000, 0x80000 ) // 1ST+2ND IDENTICAL
 ROM_END
 
+} // Anonymous namespace
+
 
 /***************************************************************************
 

src/mame/drivers/mc1000.cpp

@@ -39,6 +39,8 @@
 #include "speaker.h"
 
 
+namespace {
+
 #define SCREEN_TAG      "screen"
 #define Z80_TAG         "u13"
 #define AY8910_TAG      "u21"
@@ -109,8 +111,8 @@ private:
 
 	/* memory state */
 	int m_rom0000;
-	int m_mc6845_bank;
-	int m_mc6847_bank;
+	uint8_t m_mc6845_bank;
+	uint8_t m_mc6847_bank;
 
 	/* keyboard state */
 	int m_keylatch;
@@ -458,6 +460,8 @@ void mc1000_state::machine_start()
 	membank("bank1")->set_entry(1);
 
 	m_rom0000 = 1;
+	m_mc6845_bank = 0;
+	m_mc6847_bank = 0;
 
 	membank("bank2")->configure_entry(0, m_banked_ram.get() + 0x2000);
 	membank("bank2")->configure_entry(1, m_mc6845_video_ram);
@@ -603,6 +607,8 @@ ROM_START( mc1000 )
 	ROM_LOAD( "mc1000.ic12", 0x2000, 0x2000, CRC(750c95f0) SHA1(fd766f5ea4481ef7fd4df92cf7d8397cc2b5a6c4) )
 ROM_END
 
+} // Anonymous namespace
+
 
 /* System Drivers */
 

src/mame/drivers/nmk16.cpp

@@ -5273,6 +5273,7 @@ void nmk16_state::init_tharrier()
 	m_okibank[0]->configure_entries(0, 4, memregion("oki1")->base() + 0x20000, 0x20000);
 	m_okibank[1]->configure_entries(0, 4, memregion("oki2")->base() + 0x20000, 0x20000);
 	save_item(NAME(m_prot_count));
+	m_prot_count = 0;
 }
 
 void nmk16_state::init_hachamf_prot()

src/mame/drivers/ti99_8.cpp

@@ -673,6 +673,8 @@ void ti99_8_state::driver_reset()
 
 	// m_gromport->set_grom_base(0x9800, 0xfff1);
 
+	m_keyboard_column = 0;
+
 	// Clear INT1 and INT2 latch
 	m_int1 = CLEAR_LINE;
 	m_int2 = CLEAR_LINE;

src/mame/drivers/xor100.cpp

@@ -443,6 +443,7 @@ void xor100_state::machine_start()
 	int banks = m_ram->size() / 0x10000;
 	uint8_t *ram = m_ram->pointer();
 	uint8_t *rom = m_rom->base();
+	m_bank = 0;
 
 	/* setup memory banking */
 	membank("bank1")->configure_entries(1, banks, ram, 0x10000);

src/mame/includes/astrocde.h

@@ -142,7 +142,6 @@ public:
 	void init_ebases();
 	void init_gorf();
 	void init_astrocde();
-	virtual void video_start() override;
 	void astrocade_palette(palette_device &palette) const;
 	DECLARE_VIDEO_START(profpac);
 	void profpac_palette(palette_device &palette) const;
@@ -156,7 +155,6 @@ public:
 	inline void increment_dest(uint8_t curwidth);
 	void execute_blit();
 	void init_sparklestar();
-	virtual void machine_start() override;
 
 	void votrax_speech_w(uint8_t data);
 	DECLARE_READ_LINE_MEMBER( votrax_speech_status_r );
@@ -183,7 +181,10 @@ public:
 	void seawolf2_map(address_map &map);
 	void spacezap_map(address_map &map);
 	void wow_map(address_map &map);
+
 protected:
+	virtual void machine_start() override;
+	virtual void video_start() override;
 	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 };
 

src/mame/includes/hp9845.h

@@ -89,7 +89,7 @@ protected:
 	typedef struct {
 		uint8_t chars[ 80 ];
 		uint8_t attrs[ 80 ];
-		bool full;
+		bool full = 0;
 	} video_buffer_t;
 
 	bitmap_rgb32 m_bitmap;

src/mame/includes/nmk16.h

@@ -125,7 +125,7 @@ protected:
 	std::unique_ptr<u16[]> m_spriteram_old2;
 	int m_bgbank;
 	int m_bioship_background_bank;
-	tilemap_t *m_bg_tilemap[2];
+	tilemap_t *m_bg_tilemap[2] = {nullptr,nullptr};
 	tilemap_t *m_tx_tilemap;
 	int m_mustang_bg_xscroll;
 	u8 m_scroll[2][4];

src/mame/machine/williams.cpp

@@ -378,6 +378,9 @@ void blaster_state::machine_start()
 	/* register for save states */
 	save_item(NAME(m_vram_bank));
 	save_item(NAME(m_rom_bank));
+
+	m_vram_bank = 0;
+	m_rom_bank = 0;
 }
 
 

src/mame/video/astrocde.cpp

@@ -26,6 +26,8 @@ void astrocde_state::machine_start()
 {
 	save_item(NAME(m_ram_write_enable));
 	save_item(NAME(m_input_select));
+
+	m_input_select = 0;
 }
 
 void seawolf2_state::machine_start()
@@ -211,6 +213,8 @@ VIDEO_START_MEMBER(astrocde_state,profpac)
 	save_item(NAME(m_profpac_writemode));
 	save_item(NAME(m_profpac_writemask));
 	save_item(NAME(m_profpac_vw));
+
+	std::fill(std::begin(m_profpac_palette), std::end(m_profpac_palette), 0);
 }
 
 

src/mame/video/fm7.cpp

@@ -1403,6 +1403,8 @@ void fm7_state::fm7_console_ram_banked_w(offs_t offset, uint8_t data)
 
 void fm7_state::video_start()
 {
+	m_video.sub_busy = 0;
+	m_video.sub_halt = 0;
 	m_video.vram_access = 0;
 	m_video.crt_enable = 0;
 	m_video.vram_offset = 0x0000;
@@ -1411,11 +1413,14 @@ void fm7_state::video_start()
 	m_video.multi_page = 0;
 	m_video.subrom = 0;
 	m_video.cgrom = 0;
+	m_video.modestatus = 0;
 	m_video.fine_offset = 0;
 	m_video.nmi_mask = 0;
 	m_video.active_video_page = 0;
 	m_video.display_video_page = 0;
 	m_video.vsync_flag = 0;
+
+	m_alu.command = 0;
 }
 
 uint32_t fm7_state::screen_update_fm7(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)

src/mame/video/nmk16.cpp

@@ -109,6 +109,7 @@ VIDEO_START_MEMBER(nmk16_state, bioship)
 VIDEO_START_MEMBER(nmk16_state,macross)
 {
 	m_bg_tilemap[0] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, NAME((&nmk16_state::common_get_bg_tile_info<0, 1>))), tilemap_mapper_delegate(*this, FUNC(nmk16_state::tilemap_scan_pages)), 16, 16, 256, 32);
+	m_bg_tilemap[1] = nullptr;
 	m_tx_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(nmk16_state::common_get_tx_tile_info)), TILEMAP_SCAN_COLS, 8, 8, 32, 32);
 
 	m_tx_tilemap->set_transparent_pen(15);
@@ -128,6 +129,7 @@ VIDEO_START_MEMBER(nmk16_state,strahl)
 VIDEO_START_MEMBER(nmk16_state,macross2)
 {
 	m_bg_tilemap[0] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, NAME((&nmk16_state::common_get_bg_tile_info<0, 1>))), tilemap_mapper_delegate(*this, FUNC(nmk16_state::tilemap_scan_pages)), 16, 16, 256, 32);
+	m_bg_tilemap[1] = nullptr;
 	m_tx_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(nmk16_state::common_get_tx_tile_info)), TILEMAP_SCAN_COLS, 8, 8, 64, 32);
 
 	m_tx_tilemap->set_transparent_pen(15);
@@ -147,6 +149,7 @@ VIDEO_START_MEMBER(nmk16_state,gunnail)
 VIDEO_START_MEMBER(nmk16_state, bjtwin)
 {
 	m_bg_tilemap[0] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(nmk16_state::bjtwin_get_bg_tile_info)), TILEMAP_SCAN_COLS, 8, 8, 64, 32);
+	m_bg_tilemap[1] = nullptr;
 
 	video_init();
 	// 384x224 screen, leftmost 64 pixels have to be retrieved from the other side of the tilemap (!)
@@ -405,6 +408,7 @@ VIDEO_START_MEMBER(afega_state,grdnstrm)
 {
 	// 8bpp Tilemap
 	m_bg_tilemap[0] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(afega_state::get_bg_tile_info_8bit)), tilemap_mapper_delegate(*this, FUNC(afega_state::tilemap_scan_pages)), 16, 16, 256, 32);
+	m_bg_tilemap[1] = nullptr;
 	m_tx_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(afega_state::common_get_tx_tile_info)), TILEMAP_SCAN_COLS, 8, 8, 32, 32);
 
 	m_tx_tilemap->set_transparent_pen(15);