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/***************************************************************************

    Sega pre-System 16 & System 16A hardware

****************************************************************************

    Copyright Aaron Giles
    All rights reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are
    met:

        * Redistributions of source code must retain the above copyright
          notice, this list of conditions and the following disclaimer.
        * Redistributions in binary form must reproduce the above copyright
          notice, this list of conditions and the following disclaimer in
          the documentation and/or other materials provided with the
          distribution.
        * Neither the name 'MAME' nor the names of its contributors may be
          used to endorse or promote products derived from this software
          without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR
    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT,
    INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
    STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
    IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.

***************************************************************************/

#include "cpu/m68000/m68000.h"
#include "cpu/mcs48/mcs48.h"
#include "cpu/mcs51/mcs51.h"
#include "cpu/z80/z80.h"
#include "machine/i8255.h"
#include "machine/i8243.h"
#include "machine/nvram.h"
#include "machine/segaic16.h"
#include "sound/2151intf.h"
#include "video/segaic16.h"


// ======================> segas16a_state

class segas16a_state : public driver_device
{
public:
	// construction/destruction
	segas16a_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		  m_maincpu(*this, "maincpu"),
		  m_soundcpu(*this, "soundcpu"),
		  m_mcu(*this, "mcu"),
		  m_i8255(*this, "i8255"),
		  m_ymsnd(*this, "ymsnd"),
		  m_n7751(*this, "n7751"),
		  m_n7751_i8243(*this, "n7751_8243"),
		  m_nvram(*this, "nvram"),
		  m_workram(*this, "nvram"),
		  m_video_control(0),
		  m_mcu_control(0),
		  m_n7751_command(0),
		  m_n7751_rom_address(0),
		  m_last_buttons1(0),
		  m_last_buttons2(0),
		  m_read_port(0),
		  m_mj_input_num(0)
	{ }

	// PPI read/write callbacks
	DECLARE_WRITE8_MEMBER( misc_control_w );
	DECLARE_WRITE8_MEMBER( tilemap_sound_w );

	// main CPU read/write handlers
	DECLARE_READ16_MEMBER( standard_io_r );
	DECLARE_WRITE16_MEMBER( standard_io_w );
	DECLARE_READ16_MEMBER( misc_io_r );
	DECLARE_WRITE16_MEMBER( misc_io_w );

	// Z80 sound CPU read/write handlers
	DECLARE_READ8_MEMBER( sound_data_r );
	DECLARE_WRITE8_MEMBER( n7751_command_w );
	DECLARE_WRITE8_MEMBER( n7751_control_w );
	DECLARE_WRITE8_MEMBER( n7751_rom_offset_w );
	static WRITE8_DEVICE_HANDLER( static_n7751_rom_offset_w );

	// N7751 sound generator CPU read/write handlers
	DECLARE_READ8_MEMBER( n7751_rom_r );
	DECLARE_READ8_MEMBER( n7751_p2_r );
	DECLARE_WRITE8_MEMBER( n7751_p2_w );
	DECLARE_READ8_MEMBER( n7751_t1_r );

	// I8751 MCU read/write handlers
	DECLARE_WRITE8_MEMBER( mcu_control_w );
	DECLARE_WRITE8_MEMBER( mcu_io_w );
	DECLARE_READ8_MEMBER( mcu_io_r );

	// I8751-related VBLANK interrupt handlers
	INTERRUPT_GEN_MEMBER( mcu_irq_assert );
	INTERRUPT_GEN_MEMBER( i8751_main_cpu_vblank );

	// game-specific driver init
	DECLARE_DRIVER_INIT(generic);
	DECLARE_DRIVER_INIT(dumpmtmt);
	DECLARE_DRIVER_INIT(quartet);
	DECLARE_DRIVER_INIT(fantzonep);
	DECLARE_DRIVER_INIT(sjryukoa);
	DECLARE_DRIVER_INIT(aceattaa);
	DECLARE_DRIVER_INIT(passsht16a);
	DECLARE_DRIVER_INIT(mjleague);
	DECLARE_DRIVER_INIT(sdi);

	// video updates
	UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);

protected:
	// internal types
	typedef delegate<void ()> i8751_sim_delegate;
	typedef delegate<void (UINT8, UINT8)> lamp_changed_delegate;

	// timer IDs
	enum
	{
		TID_INIT_I8751,
		TID_PPI_WRITE
	};

	// driver overrides
	virtual void video_start();
	virtual void machine_reset();
	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);

	// I8751 simulations
	void dumpmtmt_i8751_sim();
	void quartet_i8751_sim();

	// custom I/O handlers
	DECLARE_READ16_MEMBER( aceattaa_custom_io_r );
	DECLARE_READ16_MEMBER( mjleague_custom_io_r );
	DECLARE_READ16_MEMBER( passsht16a_custom_io_r );
	DECLARE_READ16_MEMBER( sdi_custom_io_r );
	DECLARE_READ16_MEMBER( sjryuko_custom_io_r );
	void sjryuko_lamp_changed_w(UINT8 changed, UINT8 newval);

	// devices
	required_device<m68000_device> m_maincpu;
	required_device<z80_device> m_soundcpu;
	optional_device<i8751_device> m_mcu;
	required_device<i8255_device> m_i8255;
	required_device<ym2151_device> m_ymsnd;
	optional_device<n7751_device> m_n7751;
	optional_device<i8243_device> m_n7751_i8243;
	required_device<nvram_device> m_nvram;

	// memory pointers
	required_shared_ptr<UINT16> m_workram;

	// configuration
	read16_delegate			m_custom_io_r;
	write16_delegate		m_custom_io_w;
	i8751_sim_delegate		m_i8751_vblank_hook;
	lamp_changed_delegate	m_lamp_changed_w;

	// internal state
	UINT8					m_video_control;
	UINT8					m_mcu_control;
	UINT8					m_n7751_command;
	UINT32					m_n7751_rom_address;
	UINT8					m_last_buttons1;
	UINT8					m_last_buttons2;
	UINT8					m_read_port;
	UINT8					m_mj_input_num;
};