text: // license:BSD-3-Clause
  // copyright-holders:Antoine Mine
  /**********************************************************************
  
    Copyright (C) Antoine Mine' 2006
  
    Thomson 8-bit computers
  
  **********************************************************************/
  
  #ifndef MAME_INCLUDES_THOMSON_H
  #define MAME_INCLUDES_THOMSON_H
  
  #pragma once
  
  #include "cpu/m6809/m6809.h"
  #include "formats/thom_cas.h"
  #include "formats/thom_dsk.h"
  #include "imagedev/cassette.h"
  #include "imagedev/floppy.h"
  #include "machine/6821pia.h"
  #include "machine/6850acia.h"
  #include "machine/input_merger.h"
  #include "machine/mc6843.h"
  #include "machine/mc6846.h"
  #include "machine/mc6846.h"
  #include "machine/mc6854.h"
  #include "machine/mos6551.h"
  #include "machine/ram.h"
  #include "machine/thomflop.h"
  #include "sound/dac.h"
  #include "sound/mea8000.h"
  
  #include "bus/centronics/ctronics.h"
  #include "bus/generic/slot.h"
  #include "bus/generic/carts.h"
  #include "bus/rs232/rs232.h"
  
  #include "screen.h"
  
  
  /* 6821 PIAs */
  #define THOM_PIA_SYS    "pia_0"  /* system PIA */
  #define THOM_PIA_GAME   "pia_1"  /* music & game PIA (joypad + sound) */
  #define THOM_PIA_IO     "pia_2"  /* CC 90-232 I/O extension (parallel & RS-232) */
  #define THOM_PIA_MODEM  "pia_3"  /* MD 90-120 MODEM extension */
  
  /* sound ports */
  #define THOM_SOUND_BUZ    0 /* 1-bit buzzer */
  #define THOM_SOUND_GAME   1 /* 6-bit game port DAC */
  #define THOM_SOUND_SPEECH 2 /* speech synthesis */
  
  /* bank-switching */
  #define THOM_CART_BANK  "bank2" /* cartridge ROM */
  #define THOM_RAM_BANK   "bank3" /* data RAM */
  #define THOM_FLOP_BANK  "bank4" /* external floppy controller ROM */
  #define THOM_BASE_BANK  "bank5" /* system RAM */
  
  /* bank-switching */
  #define TO8_SYS_LO      "bank5" /* system RAM low 2 Kb */
  #define TO8_SYS_HI      "bank6" /* system RAM hi 2 Kb */
  #define TO8_DATA_LO     "bank7" /* data RAM low 2 Kb */
  #define TO8_DATA_HI     "bank8" /* data RAM hi 2 Kb */
  #define TO8_BIOS_BANK   "bank9" /* BIOS ROM */
  #define MO6_CART_LO     "bank10"
  #define MO6_CART_HI     "bank11"
  
  
  /* original screen dimension (may be different from emulated screen!) */
  #define THOM_ACTIVE_WIDTH  320
  #define THOM_BORDER_WIDTH   56
  #define THOM_ACTIVE_HEIGHT 200
  #define THOM_BORDER_HEIGHT  47
  #define THOM_TOTAL_WIDTH   432
  #define THOM_TOTAL_HEIGHT  294
  
  /* Emulated screen dimension may be doubled to allow hi-res 640x200 mode.
     Emulated screen can have smaller borders.
   */
  
  /* maximum number of video pages:
     1 for TO7 generation (including MO5)
     4 for TO8 generation (including TO9, MO6)
   */
  #define THOM_NB_PAGES 4
  
  /* page 0 is banked */
  #define THOM_VRAM_BANK "bank1"
  
  
  struct thom_vsignal {
  	unsigned count;  /* pixel counter */
  	unsigned init;   /* 1 -> active vertical windos, 0 -> border/VBLANK */
  	unsigned inil;   /* 1 -> active horizontal window, 0 -> border/HBLANK */
  	unsigned lt3;    /* bit 3 of us counter */
  	unsigned line;   /* line counter */
  };
  
  
  class thomson_state : public driver_device
  {
  public:
  	thomson_state(const machine_config &mconfig, device_type type, const char *tag) :
  		driver_device(mconfig, type, tag),
  		m_mc6854(*this, "mc6854"),
  		m_maincpu(*this, "maincpu"),
  		m_cassette(*this, "cassette"),
  		m_dac(*this, "dac"),
  		m_centronics(*this, "centronics"),
  		m_cent_data_out(*this, "cent_data_out"),
  		m_pia_sys(*this, THOM_PIA_SYS),
  		m_pia_game(*this, THOM_PIA_GAME),
  		m_acia(*this, "acia6850"),
  		m_mea8000(*this, "mea8000"),
  		m_ram(*this, RAM_TAG),
  		m_mc6846(*this, "mc6846"),
  		m_mc6843(*this, "mc6843"),
  		m_screen(*this, "screen"),
  		m_mainirq(*this, "mainirq"),
  		m_mainfirq(*this, "mainfirq"),
  		m_io_game_port_directions(*this, "game_port_directions"),
  		m_io_game_port_buttons(*this, "game_port_buttons"),
  		m_io_mouse_x(*this, "mouse_x"),
  		m_io_mouse_y(*this, "mouse_y"),
  		m_io_mouse_button(*this, "mouse_button"),
  		m_io_lightpen_x(*this, "lightpen_x"),
  		m_io_lightpen_y(*this, "lightpen_y"),
  		m_io_lightpen_button(*this, "lightpen_button"),
  		m_io_config(*this, "config"),
  		m_io_vconfig(*this, "vconfig"),
  		m_io_mconfig(*this, "mconfig"),
  		m_io_fconfig(*this, "fconfig"),
  		m_io_keyboard(*this, "keyboard.%u", 0),
  		m_vrambank(*this, THOM_VRAM_BANK),
  		m_cartbank(*this, THOM_CART_BANK),
  		m_rambank(*this, THOM_RAM_BANK),
  		m_flopbank(*this, THOM_FLOP_BANK),
  		m_basebank(*this, THOM_BASE_BANK),
  		m_syslobank(*this, TO8_SYS_LO),
  		m_syshibank(*this, TO8_SYS_HI),
  		m_datalobank(*this, TO8_DATA_LO),
  		m_datahibank(*this, TO8_DATA_HI),
  		m_biosbank(*this, TO8_BIOS_BANK),
  		m_cartlobank(*this, MO6_CART_LO),
  		m_carthibank(*this, MO6_CART_HI)
  	{
  	}
  
  	DECLARE_FLOPPY_FORMATS(cd90_640_formats);
  
  	DECLARE_DEVICE_IMAGE_LOAD_MEMBER( to7_cartridge );
  	DECLARE_DEVICE_IMAGE_LOAD_MEMBER( mo5_cartridge );
  
  	DECLARE_WRITE_LINE_MEMBER( to7_set_cassette_motor );
  	DECLARE_WRITE_LINE_MEMBER( mo5_set_cassette_motor );
  	DECLARE_WRITE_LINE_MEMBER( thom_dev_irq_0 );
  	DECLARE_WRITE8_MEMBER( to7_cartridge_w );
  	DECLARE_READ8_MEMBER( to7_cartridge_r );
  	DECLARE_WRITE8_MEMBER( to7_timer_port_out );
  	DECLARE_READ8_MEMBER( to7_timer_port_in );
  	DECLARE_WRITE_LINE_MEMBER( to7_set_cassette );
  	DECLARE_WRITE_LINE_MEMBER( to7_sys_cb2_out );
  	DECLARE_WRITE8_MEMBER( to7_sys_portb_out );
  	DECLARE_READ8_MEMBER( to7_sys_porta_in );
  	DECLARE_READ8_MEMBER( to7_sys_portb_in );
  	DECLARE_WRITE_LINE_MEMBER( to7_modem_cb );
  	DECLARE_WRITE_LINE_MEMBER( to7_modem_tx_w );
  	DECLARE_WRITE_LINE_MEMBER( write_acia_clock );
  	DECLARE_READ8_MEMBER( to7_modem_mea8000_r );
  	DECLARE_WRITE8_MEMBER( to7_modem_mea8000_w );
  	DECLARE_READ8_MEMBER( to7_game_porta_in );
  	DECLARE_READ8_MEMBER( to7_game_portb_in );
  	DECLARE_WRITE8_MEMBER( to7_game_portb_out );
  	DECLARE_WRITE_LINE_MEMBER( to7_game_cb2_out );
  	TIMER_CALLBACK_MEMBER( to7_game_update_cb );
  	DECLARE_READ8_MEMBER( to7_midi_r );
  	DECLARE_WRITE8_MEMBER( to7_midi_w );
  	DECLARE_MACHINE_RESET( to7 );
  	DECLARE_MACHINE_START( to7 );
  	DECLARE_WRITE_LINE_MEMBER( to770_sys_cb2_out );
  	DECLARE_READ8_MEMBER( to770_sys_porta_in );
  	void to7_update_cart_bank_postload();
  	void to770_update_ram_bank_postload();
  	DECLARE_WRITE8_MEMBER( to770_sys_portb_out );
  	DECLARE_WRITE8_MEMBER( to770_timer_port_out );
  	DECLARE_READ8_MEMBER( to770_gatearray_r );
  	DECLARE_WRITE8_MEMBER( to770_gatearray_w );
  	DECLARE_MACHINE_RESET( to770 );
  	DECLARE_MACHINE_START( to770 );
  	void to7_lightpen_cb( int step );
  	void mo5_lightpen_cb( int step );
  	TIMER_CALLBACK_MEMBER( mo5_periodic_cb );
  	DECLARE_WRITE8_MEMBER( mo5_sys_porta_out );
  	DECLARE_READ8_MEMBER( mo5_sys_porta_in );
  	DECLARE_READ8_MEMBER( mo5_sys_portb_in );
  	DECLARE_READ8_MEMBER( mo5_gatearray_r );
  	DECLARE_WRITE8_MEMBER( mo5_gatearray_w );
  	void mo5_update_cart_bank_postload();
  	DECLARE_WRITE8_MEMBER( mo5_cartridge_w );
  	DECLARE_READ8_MEMBER( mo5_cartridge_r );
  	DECLARE_WRITE8_MEMBER( mo5_ext_w );
  	DECLARE_MACHINE_RESET( mo5 );
  	DECLARE_MACHINE_START( mo5 );
  	DECLARE_WRITE8_MEMBER( to9_ieee_w );
  	DECLARE_READ8_MEMBER( to9_ieee_r );
  	DECLARE_READ8_MEMBER( to9_gatearray_r );
  	DECLARE_WRITE8_MEMBER( to9_gatearray_w );
  	DECLARE_READ8_MEMBER( to9_vreg_r );
  	DECLARE_WRITE8_MEMBER( to9_vreg_w );
  	void to9_update_cart_bank_postload();
  	DECLARE_WRITE8_MEMBER( to9_cartridge_w );
  	DECLARE_READ8_MEMBER( to9_cartridge_r );
  	void to9_update_ram_bank_postload();
  	DECLARE_READ8_MEMBER( to9_kbd_r );
  	DECLARE_WRITE8_MEMBER( to9_kbd_w );
  	TIMER_CALLBACK_MEMBER( to9_kbd_timer_cb );
  	DECLARE_READ8_MEMBER( to9_sys_porta_in );
  	DECLARE_WRITE8_MEMBER( to9_sys_porta_out );
  	DECLARE_WRITE8_MEMBER( to9_sys_portb_out );
  	DECLARE_WRITE8_MEMBER( to9_timer_port_out );
  	DECLARE_MACHINE_RESET( to9 );
  	DECLARE_MACHINE_START( to9 );
  	TIMER_CALLBACK_MEMBER( to8_kbd_timer_cb );
  	void to8_update_floppy_bank_postload();
  	void to8_update_ram_bank_postload();
  	void to8_update_cart_bank_postload();
  	DECLARE_WRITE8_MEMBER( to8_cartridge_w );
  	DECLARE_READ8_MEMBER( to8_cartridge_r );
  	DECLARE_READ8_MEMBER( to8_floppy_r );
  	DECLARE_WRITE8_MEMBER( to8_floppy_w );
  	DECLARE_READ8_MEMBER( to8_gatearray_r );
  	DECLARE_WRITE8_MEMBER( to8_gatearray_w );
  	DECLARE_READ8_MEMBER( to8_vreg_r );
  	DECLARE_WRITE8_MEMBER( to8_vreg_w );
  	DECLARE_READ8_MEMBER( to8_sys_porta_in );
  	DECLARE_WRITE8_MEMBER( to8_sys_portb_out );
  	DECLARE_READ8_MEMBER( to8_timer_port_in );
  	DECLARE_WRITE8_MEMBER( to8_timer_port_out );
  	DECLARE_WRITE_LINE_MEMBER( to8_timer_cp2_out );
  	void to8_lightpen_cb( int step );
  	DECLARE_MACHINE_RESET( to8 );
  	DECLARE_MACHINE_START( to8 );
  	DECLARE_READ8_MEMBER( to9p_timer_port_in );
  	DECLARE_WRITE8_MEMBER( to9p_timer_port_out );
  	DECLARE_MACHINE_RESET( to9p );
  	DECLARE_MACHINE_START( to9p );
  	void mo6_update_ram_bank_postload();
  	void mo6_update_cart_bank_postload();
  	DECLARE_WRITE8_MEMBER( mo6_cartridge_w );
  	DECLARE_READ8_MEMBER( mo6_cartridge_r );
  	DECLARE_WRITE8_MEMBER( mo6_ext_w );
  	DECLARE_WRITE_LINE_MEMBER( mo6_centronics_busy );
  	DECLARE_WRITE8_MEMBER( mo6_game_porta_out );
  	DECLARE_WRITE_LINE_MEMBER( mo6_game_cb2_out );
  	TIMER_CALLBACK_MEMBER( mo6_game_update_cb );
  	DECLARE_READ8_MEMBER( mo6_sys_porta_in );
  	DECLARE_READ8_MEMBER( mo6_sys_portb_in );
  	DECLARE_WRITE8_MEMBER( mo6_sys_porta_out );
  	DECLARE_WRITE_LINE_MEMBER( mo6_sys_cb2_out );
  	DECLARE_READ8_MEMBER( mo6_gatearray_r );
  	DECLARE_WRITE8_MEMBER( mo6_gatearray_w );
  	DECLARE_READ8_MEMBER( mo6_vreg_r );
  	DECLARE_WRITE8_MEMBER( mo6_vreg_w );
  	DECLARE_MACHINE_RESET( mo6 );
  	DECLARE_MACHINE_START( mo6 );
  	DECLARE_READ8_MEMBER( mo5nr_net_r );
  	DECLARE_WRITE8_MEMBER( mo5nr_net_w );
  	DECLARE_READ8_MEMBER( mo5nr_prn_r );
  	DECLARE_WRITE8_MEMBER( mo5nr_prn_w );
  	DECLARE_READ8_MEMBER( mo5nr_sys_portb_in );
  	DECLARE_WRITE8_MEMBER( mo5nr_sys_porta_out );
  	DECLARE_MACHINE_RESET( mo5nr );
  	DECLARE_MACHINE_START( mo5nr );
  
  	TIMER_CALLBACK_MEMBER( thom_lightpen_step );
  	TIMER_CALLBACK_MEMBER( thom_scanline_start );
  	uint32_t screen_update_thom(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
  	DECLARE_WRITE8_MEMBER( to7_vram_w );
  	DECLARE_WRITE8_MEMBER( to770_vram_w );
  	DECLARE_WRITE8_MEMBER( to8_sys_lo_w );
  	DECLARE_WRITE8_MEMBER( to8_sys_hi_w );
  	DECLARE_WRITE8_MEMBER( to8_data_lo_w );
  	DECLARE_WRITE8_MEMBER( to8_data_hi_w );
  	DECLARE_WRITE8_MEMBER( to8_vcart_w );
  	DECLARE_WRITE8_MEMBER( mo6_vcart_lo_w );
  	DECLARE_WRITE8_MEMBER( mo6_vcart_hi_w );
  	TIMER_CALLBACK_MEMBER( thom_set_init );
  	void to770_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void mo5_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void mo5alt_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void to9_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void bitmap4_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void bitmap4alt_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void bitmap4althalf_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void bitmap16_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void mode80_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void mode80_to9_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void page1_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void page2_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void overlay_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void overlayhalf_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void overlay3_scandraw_16( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void to770_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void mo5_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void mo5alt_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void to9_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void bitmap4_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void bitmap4alt_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void bitmap4althalf_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void bitmap16_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void mode80_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void mode80_to9_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void page1_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void page2_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void overlay_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void overlayhalf_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	void overlay3_scandraw_8( uint8_t* vram, uint16_t* dst, uint16_t* pal, int org, int len );
  	DECLARE_WRITE_LINE_MEMBER(thom_vblank);
  	DECLARE_VIDEO_START( thom );
  
  	DECLARE_READ8_MEMBER( to7_5p14_r );
  	DECLARE_WRITE8_MEMBER( to7_5p14_w );
  	DECLARE_READ8_MEMBER( to7_5p14sd_r );
  	DECLARE_WRITE8_MEMBER( to7_5p14sd_w );
  	DECLARE_READ8_MEMBER( to7_qdd_r );
  	DECLARE_WRITE8_MEMBER( to7_qdd_w );
  	TIMER_CALLBACK_MEMBER( thmfc_floppy_cmd_complete_cb );
  	DECLARE_READ8_MEMBER( thmfc_floppy_r );
  	DECLARE_WRITE8_MEMBER( thmfc_floppy_w );
  	TIMER_CALLBACK_MEMBER( ans4 );
  	TIMER_CALLBACK_MEMBER( ans3 );
  	TIMER_CALLBACK_MEMBER( ans2 );
  	TIMER_CALLBACK_MEMBER( ans );
  	DECLARE_READ8_MEMBER( to7_network_r );
  	DECLARE_WRITE8_MEMBER( to7_network_w );
  	DECLARE_READ8_MEMBER( to7_floppy_r );
  	DECLARE_WRITE8_MEMBER( to7_floppy_w );
  	DECLARE_READ8_MEMBER( to9_floppy_r );
  	DECLARE_WRITE8_MEMBER( to9_floppy_w );
  	WRITE_LINE_MEMBER( fdc_index_0_w );
  	WRITE_LINE_MEMBER( fdc_index_1_w );
  	WRITE_LINE_MEMBER( fdc_index_2_w );
  	WRITE_LINE_MEMBER( fdc_index_3_w );
  	void thomson_index_callback(legacy_floppy_image_device *device, int state);
  	DECLARE_PALETTE_INIT(thom);
  	DECLARE_PALETTE_INIT(mo5);
  
  	optional_device<mc6854_device> m_mc6854;
  
  	DECLARE_WRITE_LINE_MEMBER(write_centronics_busy);
  
  	int m_centronics_busy;
  	int m_centronics_perror;
  
  	MC6854_OUT_FRAME_CB(to7_network_got_frame);
  
  	void to9(machine_config &config);
  	void to7(machine_config &config);
  	void mo5e(machine_config &config);
  	void to770a(machine_config &config);
  	void t9000(machine_config &config);
  	void to8(machine_config &config);
  	void pro128(machine_config &config);
  	void mo6(machine_config &config);
  	void mo5(machine_config &config);
  	void to9p(machine_config &config);
  	void mo5nr(machine_config &config);
  	void to770(machine_config &config);
  	void to8d(machine_config &config);
  	void mo5(address_map &map);
  	void mo5nr(address_map &map);
  	void mo6(address_map &map);
  	void to7(address_map &map);
  	void to770(address_map &map);
  	void to8(address_map &map);
  	void to9(address_map &map);
  	void to9p(address_map &map);
  protected:
  	required_device<cpu_device> m_maincpu;
  	required_device<cassette_image_device> m_cassette;
  	required_device<dac_byte_interface> m_dac;
  	optional_device<centronics_device> m_centronics;
  	optional_device<output_latch_device> m_cent_data_out;
  	required_device<pia6821_device> m_pia_sys;
  	required_device<pia6821_device> m_pia_game;
  	required_device<acia6850_device> m_acia;
  	required_device<mea8000_device> m_mea8000;
  	required_device<ram_device> m_ram;
  	optional_device<mc6846_device> m_mc6846;
  	optional_device<mc6843_device> m_mc6843;
  	required_device<screen_device> m_screen;
  	required_device<input_merger_device> m_mainirq;
  	required_device<input_merger_device> m_mainfirq;
  	required_ioport m_io_game_port_directions;
  	required_ioport m_io_game_port_buttons;
  	required_ioport m_io_mouse_x;
  	required_ioport m_io_mouse_y;
  	required_ioport m_io_mouse_button;
  	required_ioport m_io_lightpen_x;
  	required_ioport m_io_lightpen_y;
  	required_ioport m_io_lightpen_button;
  	required_ioport m_io_config;
  	required_ioport m_io_vconfig;
  	optional_ioport m_io_mconfig;
  	required_ioport m_io_fconfig;
  	required_ioport_array<10> m_io_keyboard;
  	required_memory_bank m_vrambank;
  	optional_memory_bank m_cartbank;
  	optional_memory_bank m_rambank;
  	required_memory_bank m_flopbank;
  	required_memory_bank m_basebank;
  	required_memory_bank m_syslobank;
  	optional_memory_bank m_syshibank;
  	optional_memory_bank m_datalobank;
  	optional_memory_bank m_datahibank;
  	optional_memory_bank m_biosbank;
  	optional_memory_bank m_cartlobank;
  	optional_memory_bank m_carthibank;
  
  	/* bank logging and optimisations */
  	int m_old_cart_bank;
  	int m_old_cart_bank_was_read_only;
  	int m_old_ram_bank;
  	int m_old_floppy_bank;
  	/* buffer storing demodulated bits, only for k7 and with speed hack */
  	uint32_t m_to7_k7_bitsize;
  	uint8_t* m_to7_k7_bits;
  	/* ------------ cartridge ------------ */
  	uint8_t m_thom_cart_nb_banks; /* number of 16 KB banks (up to 4) */
  	uint8_t m_thom_cart_bank;     /* current bank */
  	uint8_t m_to7_lightpen_step;
  	uint8_t m_to7_lightpen;
  	uint8_t m_to7_modem_tx;
  	/* calls to7_game_update_cb periodically */
  	emu_timer* m_to7_game_timer;
  	uint8_t m_to7_game_sound;
  	uint8_t m_to7_game_mute;
  	emu_timer* m_mo5_periodic_timer;
  	uint8_t m_mo5_reg_cart; /* 0xa7cb bank switch */
  	uint8_t m_to9_palette_data[32];
  	uint8_t m_to9_palette_idx;
  	uint8_t m_to9_soft_bank;
  	uint8_t  m_to9_kbd_parity;  /* 0=even, 1=odd, 2=no parity */
  	uint8_t  m_to9_kbd_intr;    /* interrupt mode */
  	uint8_t  m_to9_kbd_in;      /* data from keyboard */
  	uint8_t  m_to9_kbd_status;  /* status */
  	uint8_t  m_to9_kbd_overrun; /* character lost */
  	uint8_t  m_to9_kbd_periph;     /* peripheral mode */
  	uint8_t  m_to9_kbd_byte_count; /* byte-count in peripheral mode */
  	uint16_t m_to9_mouse_x;
  	uint16_t m_to9_mouse_y;
  	uint8_t  m_to9_kbd_last_key;  /* for key repetition */
  	uint16_t m_to9_kbd_key_count;
  	uint8_t  m_to9_kbd_caps;  /* caps-lock */
  	uint8_t  m_to9_kbd_pad;   /* keypad outputs special codes */
  	emu_timer* m_to9_kbd_timer;
  	uint8_t  m_to8_kbd_ack;       /* 1 = cpu inits / accepts transfers */
  	uint16_t m_to8_kbd_data;      /* data to transmit */
  	uint16_t m_to8_kbd_step;      /* transmission automaton state */
  	uint8_t  m_to8_kbd_last_key;  /* last key (for repetition) */
  	uint32_t m_to8_kbd_key_count; /* keypress time (for repetition)  */
  	uint8_t  m_to8_kbd_caps;      /* caps lock */
  	emu_timer* m_to8_kbd_timer;   /* bit-send */
  	emu_timer* m_to8_kbd_signal;  /* signal from CPU */
  	uint8_t m_to8_data_vpage;
  	uint8_t m_to8_cart_vpage;
  	uint8_t  m_to8_reg_ram;
  	uint8_t  m_to8_reg_cart;
  	uint8_t  m_to8_reg_sys1;
  	uint8_t  m_to8_reg_sys2;
  	uint8_t  m_to8_lightpen_intr;
  	uint8_t  m_to8_soft_select;
  	uint8_t  m_to8_soft_bank;
  	uint8_t  m_to8_bios_bank;
  
  	/* We allow choosing dynamically:
  	   - the border size
  	   - whether we use 640 pixels or 320 pixels in an active row
  	   (now this is automatically chosen by default for each frame)
  	*/
  	uint16_t m_thom_bwidth;
  	uint16_t m_thom_bheight;
  	/* border size */
  	uint8_t  m_thom_hires;
  	/* 0 = low res: 320x200 active area (faster)
  	   1 = hi res:  640x200 active area (can represent all video modes)
  	*/
  	uint8_t m_thom_hires_better;
  	/* 1 = a 640 mode was used in the last frame */
  	/* we use our own video timing to precisely cope with VBLANK and HBLANK */
  	emu_timer* m_thom_video_timer; /* time elapsed from beginning of frame */
  	/* number of lightpen call-backs per frame */
  	int m_thom_lightpen_nb;
  	/* called thom_lightpen_nb times */
  	emu_timer *m_thom_lightpen_timer;
  	/* lightpen callback function to call from timer */
  	void (thomson_state::*m_thom_lightpen_cb)(int step);
  	uint8_t* m_thom_vram; /* pointer to video memory */
  	emu_timer* m_thom_scanline_timer; /* scan-line update */
  	uint16_t m_thom_last_pal[16];   /* palette at last scanline start */
  	uint16_t m_thom_pal[16];        /* current palette */
  	uint8_t  m_thom_pal_changed;    /* whether pal != old_pal */
  	uint8_t  m_thom_border_index;   /* current border color index */
  	/* the left and right border color for each row (including top and bottom
  	   border rows); -1 means unchanged wrt last scanline
  	*/
  	int16_t m_thom_border_l[THOM_TOTAL_HEIGHT+1];
  	int16_t m_thom_border_r[THOM_TOTAL_HEIGHT+1];
  	/* active area, updated one scan-line at a time every 64us,
  	   then blitted in screen_update
  	*/
  	uint16_t m_thom_vbody[640*200];
  	uint8_t m_thom_vmode; /* current vide mode */
  	uint8_t m_thom_vpage; /* current video page */
  	/* this stores the video mode & page at each GPL in the current line
  	   (-1 means unchanged)
  	*/
  	int16_t m_thom_vmodepage[41];
  	uint8_t m_thom_vmodepage_changed;
  	/* one dirty flag for each video memory line */
  	uint8_t m_thom_vmem_dirty[205];
  	/* set to 1 if undirty scanlines need to be redrawn due to other video state
  	   changes */
  	uint8_t m_thom_vstate_dirty;
  	uint8_t m_thom_vstate_last_dirty;
  	uint32_t m_thom_mode_point;
  	uint32_t m_thom_floppy_wcount;
  	uint32_t m_thom_floppy_rcount;
  	emu_timer *m_thom_init_timer;
  	void (thomson_state::*m_thom_init_cb)( int init );
  
  	int to7_get_cassette();
  	int mo5_get_cassette();
  	void mo5_set_cassette( int data );
  	void thom_irq_reset();
  	void thom_set_caps_led( int led );
  	void to7_update_cart_bank();
  	void to7_set_init( int init );
  	void to7_modem_reset();
  	void to7_modem_init();
  	uint8_t to7_get_mouse_signal();
  	void to7_game_sound_update();
  	void to7_game_init();
  	void to7_game_reset();
  	void to7_midi_reset();
  	void to7_midi_init();
  	void to770_update_ram_bank();
  	void mo5_init_timer();
  	void mo5_update_cart_bank();
  	void to9_set_video_mode( uint8_t data, int style );
  	void to9_palette_init();
  	void to9_update_cart_bank();
  	void to9_update_ram_bank();
  	int to9_kbd_ktest();
  	void to9_kbd_update_irq();
  	void to9_kbd_send( uint8_t data, int parity );
  	int to9_kbd_get_key();
  	void to9_kbd_reset();
  	void to9_kbd_init();
  	int to8_kbd_ktest();
  	int to8_kbd_get_key();
  	void to8_kbd_timer_func();
  	void to8_kbd_set_ack( int data );
  	void to8_kbd_reset();
  	void to8_kbd_init();
  	void to8_update_floppy_bank();
  	void to8_update_ram_bank();
  	void to8_update_cart_bank();
  	void to8_floppy_init();
  	void to8_floppy_reset();
  	void mo6_update_ram_bank();
  	void mo6_update_cart_bank();
  	void mo6_game_init();
  	void mo6_game_reset();
  	void mo5nr_game_init();
  	void mo5nr_game_reset();
  
  	int thom_update_screen_size();
  	unsigned thom_video_elapsed();
  	struct thom_vsignal thom_get_vsignal();
  	void thom_get_lightpen_pos( int*x, int* y );
  	struct thom_vsignal thom_get_lightpen_vsignal( int xdec, int ydec, int xdec2 );
  	void thom_set_lightpen_callback( int nb );
  	int thom_mode_is_hires( int mode );
  	void thom_border_changed();
  	void thom_gplinfo_changed();
  	void thom_set_border_color( unsigned index );
  	void thom_set_palette( unsigned index, uint16_t color );
  	void thom_set_video_mode( unsigned mode );
  	void thom_set_video_page( unsigned page );
  	void thom_set_mode_point( int point );
  	void thom_floppy_active( int write );
  	unsigned to7_lightpen_gpl( int decx, int decy );
  	void thom_configure_palette( double gamma, const uint16_t* pal, palette_device& palette );
  
  	int thom_floppy_make_addr( chrn_id id, uint8_t* dst, int sector_size );
  	int thom_floppy_make_sector( legacy_floppy_image_device* img, chrn_id id, uint8_t* dst, int sector_size );
  	int thom_floppy_make_track( legacy_floppy_image_device* img, uint8_t* dst, int sector_size, int side );
  	int thom_qdd_make_addr( int sector, uint8_t* dst );
  	int thom_qdd_make_sector( legacy_floppy_image_device* img, int sector, uint8_t* dst );
  	int thom_qdd_make_disk ( legacy_floppy_image_device* img, uint8_t* dst );
  	void to7_5p14_reset();
  	void to7_5p14_init();
  	void to7_5p14_index_pulse_callback( device_t *controller,legacy_floppy_image_device *image, int state );
  	void to7_5p14sd_reset();
  	void to7_5p14sd_init();
  	void to7_qdd_index_pulse_cb( device_t *controller,legacy_floppy_image_device *image, int state );
  	legacy_floppy_image_device * to7_qdd_image();
  	void to7_qdd_stat_update();
  	uint8_t to7_qdd_read_byte();
  	void to7_qdd_write_byte( uint8_t data );
  	void to7_qdd_reset();
  	void to7_qdd_init();
  	legacy_floppy_image_device * thmfc_floppy_image();
  	int thmfc_floppy_is_qdd( legacy_floppy_image_device *image );
  	void thmfc_floppy_index_pulse_cb( device_t *controller,legacy_floppy_image_device *image, int state );
  	int thmfc_floppy_find_sector( chrn_id* dst );
  	void thmfc_floppy_cmd_complete();
  	uint8_t thmfc_floppy_read_byte();
  	uint8_t thmfc_floppy_raw_read_byte();
  	void thmfc_floppy_qdd_write_byte( uint8_t data );
  	void thmfc_floppy_write_byte( uint8_t data );
  	void thmfc_floppy_format_byte( uint8_t data );
  	void thmfc_floppy_reset();
  	void thmfc_floppy_init();
  	void to7_network_init();
  	void to7_network_reset();
  	void to7_floppy_init( void* base );
  	void to7_floppy_reset();
  	void to9_floppy_init(void* int_base, void* ext_base);
  	void to9_floppy_reset();
  };
  
  /*----------- defined in video/thomson.c -----------*/
  
  /*
     TO7 video:
     one line (64 us) =
        56 left border pixels ( 7 us)
     + 320 active pixels (40 us)
     +  56 right border pixels ( 7 us)
     +     horizontal retrace (10 us)
  
     one image (20 ms) =
        47 top border lines (~3 ms)
     + 200 active lines (12.8 ms)
     +  47 bottom border lines (~3 ms)
     +     vertical retrace (~1 ms)
  
     TO9 and up introduced a half (160 pixels) and double (640 pixels)
     horizontal mode, but still in 40 us (no change in refresh rate).
  */
  
  
  /***************************** dimensions **************************/
  
  
  /*********************** video signals *****************************/
  
  /***************************** commons *****************************/
  
  
  /* video modes */
  #define THOM_VMODE_TO770       0
  #define THOM_VMODE_MO5         1
  #define THOM_VMODE_BITMAP4     2
  #define THOM_VMODE_BITMAP4_ALT 3
  #define THOM_VMODE_80          4
  #define THOM_VMODE_BITMAP16    5
  #define THOM_VMODE_PAGE1       6
  #define THOM_VMODE_PAGE2       7
  #define THOM_VMODE_OVERLAY     8
  #define THOM_VMODE_OVERLAY3    9
  #define THOM_VMODE_TO9        10
  #define THOM_VMODE_80_TO9     11
  #define THOM_VMODE_BITMAP4_ALT_HALF 12
  #define THOM_VMODE_MO5_ALT    13
  #define THOM_VMODE_OVERLAY_HALF     14
  #define THOM_VMODE_NB         15
  
  
  class to7_io_line_device : public device_t
  {
  public:
  	// construction/destruction
  	to7_io_line_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
  
  protected:
  	// device-level overrides
  	virtual void device_start() override;
  	virtual void device_add_mconfig(machine_config &config) override;
  
  private:
  	required_device<pia6821_device> m_pia_io;
  	required_device<rs232_port_device> m_rs232;
  	int m_last_low;
  	int m_centronics_busy;
  	int m_rxd;
  	int m_cts;
  	int m_dsr;
  
  	/* read data register */
  	DECLARE_READ8_MEMBER(porta_in);
  
  	/* write data register */
  	DECLARE_WRITE8_MEMBER(porta_out);
  
  	DECLARE_WRITE_LINE_MEMBER(write_rxd);
  	DECLARE_WRITE_LINE_MEMBER(write_cts);
  	DECLARE_WRITE_LINE_MEMBER(write_dsr);
  	DECLARE_WRITE_LINE_MEMBER(write_centronics_busy);
  };
  
  DECLARE_DEVICE_TYPE(TO7_IO_LINE, to7_io_line_device)
  
  #define MCFG_TO7_IO_LINE_ADD(_tag)  \
  	MCFG_DEVICE_ADD((_tag), TO7_IO_LINE, 0)
  
  #endif // MAME_INCLUDES_THOMSON_H
  