init vars for coverity (drivers)

src/mame/drivers/atarisy4.cpp

@@ -338,7 +338,7 @@ void atarisy4_state::atarisy4_renderer::draw_scanline(int32_t scanline, const ex
 void atarisy4_state::atarisy4_renderer::draw_polygon(uint16_t color)
 {
 	rectangle clip;
-	vertex_t v1, v2, v3;
+	vertex_t v1{}, v2{}, v3{};
 	atarisy4_polydata &extradata = object_data().next();
 	render_delegate rd_scan = render_delegate(&atarisy4_renderer::draw_scanline, this);
 

src/mame/drivers/bionicc.cpp

@@ -164,8 +164,8 @@ private:
 	void audiocpu_nmi_w(u8 data);
 
 	// protection mcu
-	u8 m_audiocpu_to_mcu; // ls374 at 4a
-	u8 m_mcu_to_audiocpu; // ls374 at 5a
+	u8 m_audiocpu_to_mcu = 0; // ls374 at 4a
+	u8 m_mcu_to_audiocpu = 0; // ls374 at 5a
 	u8 m_mcu_p1 = 0;
 	u8 m_mcu_p3;
 

src/mame/drivers/dvk_ksm.cpp

@@ -136,8 +136,8 @@ private:
 
 	struct
 	{
-		uint8_t line;
-		uint16_t ptr;
+		uint8_t line = 0;
+		uint16_t ptr = 0;
 	} m_video;
 
 	enum
@@ -145,8 +145,8 @@ private:
 		TIMER_ID_BRG = 0
 	};
 
-	bool brg_state;
-	int brga, brgb, brgc;
+	bool brg_state = false;
+	int brga = 0, brgb = 0, brgc = 0;
 	emu_timer *m_brg = nullptr;
 
 	void update_brg(bool a, bool b, int c);

src/mame/drivers/ecoinfr.cpp

@@ -116,8 +116,8 @@ private:
 	virtual void machine_start() override { m_digits.resolve(); }
 	TIMER_DEVICE_CALLBACK_MEMBER(ecoinfr_irq_timer);
 
-	uint8_t m_banksel;
-	uint8_t m_credsel;
+	uint8_t m_banksel = 0;
+	uint8_t m_credsel = 0;
 
 	required_device<cpu_device> m_maincpu;
 	required_device_array<stepper_device, 4> m_reel;

src/mame/drivers/ghosteo.cpp

@@ -81,10 +81,10 @@ enum nand_mode_t
 
 struct nand_t
 {
-	nand_mode_t mode;
-	int page_addr;
-	int byte_addr;
-	int addr_load_ptr;
+	nand_mode_t mode{};
+	int page_addr = 0;
+	int byte_addr = 0;
+	int addr_load_ptr = 0;
 };
 
 
@@ -135,7 +135,7 @@ private:
 	void qs1000_p2_w(uint8_t data);
 	void qs1000_p3_w(uint8_t data);
 
-	int m_rom_pagesize;
+	int m_rom_pagesize = 0;
 	uint32_t s3c2410_gpio_port_r(offs_t offset);
 	void s3c2410_gpio_port_w(offs_t offset, uint32_t data);
 	uint32_t s3c2410_core_pin_r(offs_t offset);

src/mame/drivers/hapyfish.cpp

@@ -114,7 +114,7 @@ private:
 	bool m_i2c_scl = false;
 	bool m_i2c_scl_pulse_started = false;
 	bool m_i2c_started = false;
-	i2c_mode m_i2c_mode;
+	i2c_mode m_i2c_mode{};
 	uint8_t m_i2c_addr = 0;
 	uint8_t m_i2c_addr_bits = 0;
 	uint8_t m_i2c_data = 0;

src/mame/drivers/hp16500.cpp

@@ -109,7 +109,7 @@ private:
 	void hp1650_map(address_map &map);
 	void hp1651_map(address_map &map);
 
-	uint32_t m_palette[256], m_colors[3], m_count, m_clutoffs;
+	uint32_t m_palette[256]{}, m_colors[3]{}, m_count = 0, m_clutoffs = 0;
 };
 
 uint32_t hp16500_state::vbl_state_r()

src/mame/drivers/macpdm.cpp

@@ -47,13 +47,13 @@ private:
 	required_device_array<floppy_connector, 2> m_floppy;
 	required_device<mac_video_sonora_device> m_video;
 
-	floppy_image_device *m_cur_floppy;
+	floppy_image_device *m_cur_floppy = nullptr;
 
-	uint32_t m_model_id;
-	uint64_t m_hmc_reg, m_hmc_buffer;
-	uint8_t m_hmc_bit;
+	uint32_t m_model_id = 0;
+	uint64_t m_hmc_reg = 0, m_hmc_buffer = 0;
+	uint8_t m_hmc_bit = 0;
 
-	uint8_t m_irq_control;
+	uint8_t m_irq_control = 0;
 
 	uint8_t m_via2_ier = 0, m_via2_ifr = 0, m_via2_sier = 0, m_via2_sifr = 0;
 

src/mame/drivers/magic10.cpp

@@ -162,9 +162,9 @@ protected:
 	TILE_GET_INFO_MEMBER(get_layer2_tile_info);
 	uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
 
-	tilemap_t *m_tilemap[3];
+	tilemap_t *m_tilemap[3]{};
 	required_shared_ptr_array<uint16_t, 3> m_videoram;
-	int8_t m_layer2_offset[2];
+	int8_t m_layer2_offset[2]{};
 
 	required_shared_ptr<uint16_t> m_vregs;
 	required_device<cpu_device> m_maincpu;
@@ -222,7 +222,7 @@ protected:
 
 private:
 	uint16_t r();
-	uint16_t m_ret;
+	uint16_t m_ret = 0;
 
 	void map(address_map &map);
 };

src/mame/drivers/magicfly.cpp

@@ -476,8 +476,8 @@ protected:
 private:
 	required_shared_ptr<uint8_t> m_videoram;
 	required_shared_ptr<uint8_t> m_colorram;
-	tilemap_t *m_bg_tilemap;
-	int m_input_selector;
+	tilemap_t *m_bg_tilemap = nullptr;
+	int m_input_selector = 0;
 	required_device<cpu_device> m_maincpu;
 	required_device<dac_bit_interface> m_dac;
 	required_device<gfxdecode_device> m_gfxdecode;

src/mame/drivers/magictg.cpp

@@ -174,10 +174,10 @@ private:
 	/* ASIC */
 	struct
 	{
-		uint32_t src_addr;
-		uint32_t dst_addr;
-		uint32_t ctrl;
-		uint32_t count;
+		uint32_t src_addr = 0;
+		uint32_t dst_addr = 0;
+		uint32_t ctrl = 0;
+		uint32_t count = 0;
 	} m_dma_ch[3];
 
 
@@ -186,10 +186,10 @@ private:
 
 	struct
 	{
-		uint16_t bdma_internal_addr;
-		uint16_t bdma_external_addr;
-		uint16_t bdma_control;
-		uint16_t bdma_word_count;
+		uint16_t bdma_internal_addr = 0;
+		uint16_t bdma_external_addr = 0;
+		uint16_t bdma_control = 0;
+		uint16_t bdma_word_count = 0;
 	} m_adsp_regs;
 
 
@@ -199,21 +199,21 @@ private:
 	struct
 	{
 		/* PCI */
-		uint32_t command;
-		uint32_t base_addr;
+		uint32_t command = 0;
+		uint32_t base_addr = 0;
 
-		uint32_t init_enable;
+		uint32_t init_enable = 0;
 	} m_voodoo_pci_regs[2];
 
 
 	struct
 	{
 		/* PCI */
-		uint32_t command;
-		uint32_t base_addr;
+		uint32_t command = 0;
+		uint32_t base_addr = 0;
 
 		/* Memory-mapped */
-		uint32_t as_regs[0x200]; // was 19, increased to 0x200 for coverity 315123, needed for zr36120_r/w, to stop crash at start.
+		uint32_t as_regs[0x200]{}; // was 19, increased to 0x200 for coverity 315123, needed for zr36120_r/w, to stop crash at start.
 	} m_zr36120;
 
 

src/mame/drivers/marinedt.cpp

@@ -157,20 +157,20 @@ private:
 	required_device<gfxdecode_device> m_gfxdecode;
 	required_ioport_array<4> m_in_track;
 
-	tilemap_t *m_tilemap;
+	tilemap_t *m_tilemap = nullptr;
 	std::unique_ptr<bitmap_ind16> m_seabitmap[2];
 	struct
 	{
-		uint8_t offs;
-		uint8_t x;
-		uint8_t y;
+		uint8_t offs = 0;
+		uint8_t x = 0;
+		uint8_t y = 0;
 		bitmap_ind16 bitmap;
 	}m_obj[2];
 
-	uint8_t m_layer_en;
-	uint8_t m_in_select;
-	bool m_screen_flip;
-	uint8_t m_sea_bank;
+	uint8_t m_layer_en = 0;
+	uint8_t m_in_select = 0;
+	bool m_screen_flip = false;
+	uint8_t m_sea_bank = 0;
 
 	void init_seabitmap();
 	void obj_reg_w(uint8_t which,uint8_t reg, uint8_t data);

src/mame/drivers/mgavegas.cpp

@@ -69,41 +69,41 @@ public:
 	void init_mgavegas133();
 
 private:
-	uint8_t m_int;
+	uint8_t m_int = 0;
 
 	//OUT1
-	uint8_t m_ckmod;
-	uint8_t m_dmod;
-	uint8_t m_emod;
-	uint8_t m_inh;
-	uint8_t m_hop;
-	uint8_t m_seg;
-	uint8_t m_printer;
-	uint8_t m_auxp;
+	uint8_t m_ckmod = 0;
+	uint8_t m_dmod = 0;
+	uint8_t m_emod = 0;
+	uint8_t m_inh = 0;
+	uint8_t m_hop = 0;
+	uint8_t m_seg = 0;
+	uint8_t m_printer = 0;
+	uint8_t m_auxp = 0;
 
 	//helper...
-	uint8_t m_old_ckmod;
-	uint8_t m_old_emod;
+	uint8_t m_old_ckmod = 0;
+	uint8_t m_old_emod = 0;
 
 	//OUT2
-	uint8_t m_bobina_ctrl;
-	uint8_t m_timbre;
-	uint8_t m_coil_1;
-	uint8_t m_coil_2;
-	uint8_t m_coil_3;
-	uint8_t m_cont_ent;
-	uint8_t m_cont_sal;
-	uint8_t m_cont_caj;
+	uint8_t m_bobina_ctrl = 0;
+	uint8_t m_timbre = 0;
+	uint8_t m_coil_1 = 0;
+	uint8_t m_coil_2 = 0;
+	uint8_t m_coil_3 = 0;
+	uint8_t m_cont_ent = 0;
+	uint8_t m_cont_sal = 0;
+	uint8_t m_cont_caj = 0;
 
 	//lamps out
-	uint64_t m_custom_data;
-	uint8_t m_auxs;
-	uint8_t m_anal;
-	uint8_t m_anacl;
-	uint8_t m_anacr;
-	uint8_t m_anar;
-	uint8_t m_pl;
-	uint8_t m_pc;
+	uint64_t m_custom_data = 0L;
+	uint8_t m_auxs = 0;
+	uint8_t m_anal = 0;
+	uint8_t m_anacl = 0;
+	uint8_t m_anacr = 0;
+	uint8_t m_anar = 0;
+	uint8_t m_pl = 0;
+	uint8_t m_pc = 0;
 	uint8_t m_pr = 0;
 	uint8_t m_luz_250_rul = 0;
 	uint8_t m_luz_100_rul = 0;

src/mame/drivers/notetaker.cpp

@@ -185,18 +185,18 @@ private:
 	void ep_mainram_w(offs_t offset, uint16_t data, uint16_t mem_mask);
 	//variables
 	//  IPConReg
-	uint8_t m_BootSeqDone;
-	uint8_t m_ProcLock;
-	uint8_t m_CharCtr;
-	uint8_t m_DisableROM;
-	uint8_t m_CorrOn_q;
-	uint8_t m_LedInd6;
-	uint8_t m_LedInd7;
-	uint8_t m_LedInd8;
+	uint8_t m_BootSeqDone = 0;
+	uint8_t m_ProcLock = 0;
+	uint8_t m_CharCtr = 0;
+	uint8_t m_DisableROM = 0;
+	uint8_t m_CorrOn_q = 0;
+	uint8_t m_LedInd6 = 0;
+	uint8_t m_LedInd7 = 0;
+	uint8_t m_LedInd8 = 0;
 	//  FIFOReg
-	uint8_t m_TabletYOn;
-	uint8_t m_TabletXOn;
-	uint8_t m_FrSel2;
+	uint8_t m_TabletYOn = 0;
+	uint8_t m_TabletXOn = 0;
+	uint8_t m_FrSel2 = 0;
 	uint8_t m_FrSel1 = 0;
 	uint8_t m_FrSel0 = 0;
 	uint8_t m_SHConB = 0;
@@ -228,7 +228,7 @@ private:
 	emu_timer *m_FIFO_timer = nullptr;
 	TIMER_CALLBACK_MEMBER(timer_fifoclk);
 	// framebuffer display starting address
-	uint16_t m_DispAddr;
+	uint16_t m_DispAddr = 0;
 
 // separate cpu resets
 	void iop_reset();

src/mame/drivers/pasopia7.cpp

@@ -137,7 +137,7 @@ private:
 	uint8_t m_nmi_reset = 0;
 	uint8_t m_screen_type = 0;
 	void pasopia_nmi_trap();
-	uint8_t m_mux_data;
+	uint8_t m_mux_data = 0;
 	u8 m_porta_2 = 0;
 	bool m_spr_sw = false;
 	emu_timer *m_pio_timer = nullptr;

src/mame/drivers/positron.cpp

@@ -113,7 +113,7 @@ private:
 
 	memory_passthrough_handler m_mmu_shadow_tap;
 
-	uint8_t m_prev_opcode;
+	uint8_t m_prev_opcode = 0;
 };
 
 

src/mame/drivers/smc777.cpp

@@ -143,7 +143,7 @@ private:
 	uint8_t m_fdc_drq_flag = 0;
 	uint8_t m_system_data = 0;
 	struct { uint8_t r = 0, g = 0, b = 0; } m_pal;
-	uint8_t m_raminh,m_raminh_pending_change = 0; //bankswitch
+	uint8_t m_raminh = 0, m_raminh_pending_change = 0; //bankswitch
 	uint8_t m_raminh_prefetch = 0;
 	uint8_t m_pal_mode = 0;
 	uint8_t m_keyb_cmd = 0;

src/mame/drivers/ssfindo.cpp

@@ -172,7 +172,7 @@ protected:
 	virtual void machine_reset() override;
 
 	typedef void (ssfindo_state::*speedup_func)();
-	speedup_func m_speedup;
+	speedup_func m_speedup{};
 
 	uint32_t m_flashType = 0;
 

src/mame/drivers/ttchamp.cpp

@@ -104,7 +104,7 @@ private:
 		SET_READLATCH = 4
 	};
 
-	picmode m_picmodex;
+	picmode m_picmodex{};
 
 	int m_pic_readaddr = 0;
 	int m_pic_writeaddr = 0;

src/mame/drivers/vgmplay.cpp

@@ -473,7 +473,7 @@ public:
 private:
 	virtual void machine_start() override;
 
-	uint32_t m_held_clock;
+	uint32_t m_held_clock = 0;
 	std::vector<uint8_t> m_file_data;
 	required_device<vgmplay_device> m_vgmplay;
 	required_device<vgmviz_device> m_mixer;

src/mame/drivers/vis.cpp

@@ -252,7 +252,7 @@ private:
 	int m_extcnt = 0;
 	uint8_t m_extreg = 0U;
 	uint8_t m_interlace = 0U;
-	uint16_t m_wina, m_winb = 0U;
+	uint16_t m_wina = 0U, m_winb = 0U;
 	uint8_t m_shift256 = 0U, m_dw = 0U, m_8bit_640 = 0U;
 	uint8_t m_crtc_regs[0x32]{};
 };

src/mame/includes/nforcepc.h

@@ -52,7 +52,7 @@ protected:
 private:
 	required_device<device_memory_interface> cpu;
 	required_device<intelfsh8_device> biosrom;
-	uint32_t ram_size;
+	uint32_t ram_size = 0;
 
 	virtual uint8_t header_type_r() override;
 	uint8_t unknown_r();
@@ -83,9 +83,9 @@ protected:
 
 private:
 	int ddr_ram_size = 0;
-	std::vector<uint32_t> ram;
-	crush11_host_device *host;
-	address_space *ram_space;
+	std::vector<uint32_t> ram{};
+	crush11_host_device *host = nullptr;
+	address_space *ram_space = nullptr;
 };
 
 DECLARE_DEVICE_TYPE(CRUSH11_MEMORY, crush11_memory_device)
@@ -274,11 +274,11 @@ private:
 		ACPI,           // ACPI
 		Gpio567 = 12    // GPIO set 5, 6 and 7
 	};
-	int config_key_step;
-	int config_index;
-	int logical_device;
-	uint8_t global_configuration_registers[0x30];
-	uint8_t configuration_registers[13][0x100];
+	int config_key_step = 0;
+	int config_index = 0;
+	int logical_device = 0;
+	uint8_t global_configuration_registers[0x30]{};
+	uint8_t configuration_registers[13][0x100]{};
 	devcb_write_line pin_reset_callback;
 	devcb_write_line pin_gatea20_callback;
 	devcb_write_line m_txd1_callback;
@@ -292,14 +292,14 @@ private:
 	required_device<ns16450_device> pc_serial1_comdev;
 	required_device<ns16450_device> pc_serial2_comdev;
 	required_device<kbdc8042_device> m_kbdc;
-	bool enabled_logical[13];
-	bool enabled_game_port;
-	bool enabled_midi_port;
+	bool enabled_logical[13]{};
+	bool enabled_game_port = false;
+	bool enabled_midi_port = false;
 
-	lpcbus_host_interface *lpchost;
-	int lpcindex;
-	address_space *memspace;
-	address_space *iospace;
+	lpcbus_host_interface *lpchost = nullptr;
+	int lpcindex = 0;
+	address_space *memspace = nullptr;
+	address_space *iospace = nullptr;
 
 	void internal_memory_map(address_map &map);
 	void internal_io_map(address_map &map);