atarisy1, bfcobra, gts80b, hp48, hyhoo, jpmsys5, malzak, system16, tecmosys, tmnt: initialized some variables that were causing crashes in drvnoclear builds

src/mame/drivers/bfcobra.cpp

@@ -125,6 +125,8 @@
 #include "brkball.lh"
 
 
+namespace {
+
 /*
     Defines
 */
@@ -149,7 +151,7 @@ union ADDR_REG
 	struct { uint16_t hiword, loword ; } as16bit;
 	struct { uint8_t addr2, addr1, addr0; } as8bit;
 #endif
-	uint32_t addr;
+	uint32_t addr = 0;
 };
 
 /* Blitter register flag bits */
@@ -2982,6 +2984,9 @@ ROM_START( brkball )
 	ROM_LOAD("ledv1.bin",  0x00000, 0x10000, CRC(ea918cb9) SHA1(9e7047613cf1cb4b9a7fefb8a02d8479a7b09e6a))
 ROM_END
 
+} // Anonymous namespace
+
+
 GAME( 1989, inquiztr, 0,   bfcobra,          bfcobra, bfcobra_state, init_bfcobra, ROT0, "BFM",      "Inquizitor",                              MACHINE_NOT_WORKING )
 GAME( 1990, escounts, 0,   bfcobra,          bfcobra, bfcobra_state, init_bfcobra, ROT0, "BFM",      "Every Second Counts (39-360-053)",        MACHINE_IMPERFECT_GRAPHICS )
 GAME( 1991, trebltop, 0,   bfcobra,          bfcobra, bfcobra_state, init_bfcobra, ROT0, "BFM",      "Treble Top (39-360-070)",                 MACHINE_IMPERFECT_GRAPHICS )

src/mame/drivers/gts80b.cpp

@@ -23,6 +23,8 @@
 #include "gts80b.lh"
 
 
+namespace {
+
 class gts80b_state : public genpin_class
 {
 public:
@@ -385,6 +387,9 @@ void gts80b_state::machine_reset()
 {
 	m_in_cmd_mode[0] = false;
 	m_in_cmd_mode[1] = false;
+	m_dispcmd = 0;
+	m_digit[0] = 0;
+	m_digit[1] = 0;
 }
 
 void gts80b_state::init_gts80b()
@@ -1805,6 +1810,9 @@ ROM_START(topsound)
 	ROM_LOAD("yrom2a.snd",0xc000,0x2000, CRC(66645a3f) SHA1(f06261af81e6b1829d639933297d2461a8c993fc))
 ROM_END
 
+} // Anonymous namespace
+
+
 GAME(1985, bountyh,   0,        gts80b_s,  gts80b, gts80b_state, init_gts80b, ROT0, "Gottlieb",               "Bounty Hunter",                             MACHINE_IS_SKELETON_MECHANICAL)
 GAME(1985, bountyhg,  bountyh,  gts80b_s,  gts80b, gts80b_state, init_gts80b, ROT0, "Gottlieb",               "Bounty Hunter (German)",                    MACHINE_IS_SKELETON_MECHANICAL)
 GAME(1985, triplay,   0,        gts80b_s,  gts80b, gts80b_state, init_gts80b, ROT0, "Gottlieb",               "Chicago Cubs' Triple Play",                 MACHINE_IS_SKELETON_MECHANICAL)

src/mame/drivers/jpmsys5.cpp

@@ -793,6 +793,8 @@ void jpmsys5_state::machine_start()
 {
 	m_lamps.resolve();
 	m_sys5leds.resolve();
+
+	m_lamp_strobe = 0;
 }
 
 void jpmsys5_state::machine_reset()

src/mame/machine/hp48.cpp

@@ -897,6 +897,9 @@ void hp48_state::init_hp48()
 		m_modules[i].write    = write8sm_delegate(*this);
 		m_modules[i].data     = nullptr;
 		m_modules[i].isnop    = 0;
+		m_modules[i].state    = 0;
+		m_modules[i].base    = 0;
+		m_modules[i].mask    = 0;
 	}
 	m_rom = nullptr;
 }
@@ -905,6 +908,7 @@ void hp48_state::machine_reset()
 {
 	LOG(("hp48: machine reset called\n"));
 	m_bank_switch = 0;
+	m_cur_screen = 0;
 	reset_modules();
 	update_annunciators();
 }

src/mame/video/atarisy1.cpp

@@ -169,6 +169,7 @@ void atarisy1_state::video_start()
 	m_next_timer_scanline = -1;
 	m_scanline_int_state = 0;
 	m_bankselect = 0xff;
+	m_playfield_tile_bank = 0;
 
 	// save state
 	save_item(NAME(m_playfield_tile_bank));

src/mame/video/hyhoo.cpp

@@ -236,6 +236,8 @@ void hyhoo_state::video_start()
 	save_item(NAME(m_highcolorflag));
 	save_item(NAME(m_flipscreen));
 	save_item(NAME(m_tmpbitmap));
+
+	m_blitter_src_addr = 0;
 }
 
 

src/mame/video/malzak.cpp

@@ -68,6 +68,8 @@ TILE_GET_INFO_MEMBER(malzak_state::get_tile_info)
 
 void malzak_state::video_start()
 {
+	m_scrollx = 0;
+
 	int width = m_screen->width();
 	int height = m_screen->height();
 	m_trom_bitmap = std::make_unique<bitmap_rgb32>(width, height);

src/mame/video/system16.cpp

@@ -399,6 +399,12 @@ VIDEO_START_MEMBER(segas1x_bootleg_state,system16)
 
 	m_refreshenable = 1;
 
+	for (int i = 0; i < 2; i++)
+	{
+		std::fill(std::begin(m_bg_page[i]), std::end(m_bg_page[i]), 0);
+		std::fill(std::begin(m_fg_page[i]), std::end(m_fg_page[i]), 0);
+	}
+
 	/* common defaults */
 	m_tilebank_switch = 0x1000;
 

src/mame/video/tecmosys.cpp

@@ -374,5 +374,6 @@ void tecmosys_state::video_start()
 	m_tilemap[3] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(tecmosys_state::get_tile_info<3>)), TILEMAP_SCAN_ROWS, 16,16, 32,32);
 	m_tilemap[3]->set_transparent_pen(0);
 
+	m_spritelist = 0;
 	save_item(NAME(m_spritelist));
 }

src/mame/video/tmnt.cpp

@@ -246,6 +246,12 @@ VIDEO_START_MEMBER(tmnt_state,lgtnfght)/* also tmnt2, ssriders */
 
 	m_dim_c = m_dim_v = m_lastdim = m_lasten = 0;
 
+	for (int i = 0; i < 3; i++)
+	{
+		m_layer_colorbase[i] = 0;
+		m_sorted_layer[i] = 0;
+	}
+
 	save_item(NAME(m_dim_c));
 	save_item(NAME(m_dim_v));
 	save_item(NAME(m_lastdim));