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// license:BSD-3-Clause
// copyright-holders:Nicola Salmoria
/***************************************************************************

    Ms.Pac-Man/Galaga - 20 Year Reunion hardware

    driver by Nicola Salmoria

***************************************************************************/
#include "machine/eepromser.h"
#include "sound/namco.h"
#include "machine/intelfsh.h"

class _20pacgal_state : public driver_device
{
public:
	_20pacgal_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		m_video_ram(*this, "video_ram"),
		m_char_gfx_ram(*this, "char_gfx_ram"),
		m_stars_seed(*this, "stars_seed"),
		m_stars_ctrl(*this, "stars_ctrl"),
		m_flip(*this, "flip"),
		m_maincpu(*this, "maincpu"),
		m_eeprom(*this, "eeprom") { }

	/* memory pointers */
	required_shared_ptr<uint8_t> m_video_ram;
	required_shared_ptr<uint8_t> m_char_gfx_ram;
	required_shared_ptr<uint8_t> m_stars_seed;
	required_shared_ptr<uint8_t> m_stars_ctrl;
	required_shared_ptr<uint8_t> m_flip;

	/* machine state */
	uint8_t m_game_selected;  /* 0 = Ms. Pac-Man, 1 = Galaga */

	/* devices */
	required_device<cpu_device> m_maincpu;
	required_device<eeprom_serial_93cxx_device> m_eeprom;

	/* memory */
	uint8_t m_sprite_gfx_ram[0x2000];
	uint8_t m_sprite_ram[0x180];
	uint8_t m_sprite_color_lookup[0x100];
	uint8_t m_ram_48000[0x2000];

	/* 25pacman and 20pacgal store the sprite palette at a different address, this is a hardware difference and confirmed NOT to be a register */
	uint8_t m_sprite_pal_base;

	uint8_t m_irq_mask;
	DECLARE_WRITE8_MEMBER(irqack_w);
	DECLARE_WRITE8_MEMBER(timer_pulse_w);
	DECLARE_WRITE8_MEMBER(_20pacgal_coin_counter_w);
	DECLARE_WRITE8_MEMBER(ram_bank_select_w);
	DECLARE_WRITE8_MEMBER(ram_48000_w);
	DECLARE_WRITE8_MEMBER(sprite_gfx_w);
	DECLARE_WRITE8_MEMBER(sprite_ram_w);
	DECLARE_WRITE8_MEMBER(sprite_lookup_w);
	void init_25pacman();
	void init_20pacgal();
	virtual void machine_start() override;
	virtual void machine_reset() override;
	uint32_t screen_update_20pacgal(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
	DECLARE_WRITE_LINE_MEMBER(vblank_irq);
	void get_pens(pen_t *pens);
	void do_pen_lookup(bitmap_rgb32 &bitmap, const rectangle &cliprect);
	void draw_sprites(bitmap_rgb32 &bitmap);
	void draw_chars(bitmap_rgb32 &bitmap);
	void draw_stars(bitmap_rgb32 &bitmap, const rectangle &cliprect );
	void draw_sprite(bitmap_rgb32 &bitmap, int y, int x,
						uint8_t code, uint8_t color, int flip_y, int flip_x);
	void common_save_state();
	void _20pacgal(machine_config &config);
	void _20pacgal_video(machine_config &config);
	void _20pacgal_io_map(address_map &map);
	void _20pacgal_map(address_map &map);
};


class _25pacman_state : public _20pacgal_state
{
public:
	_25pacman_state(const machine_config &mconfig, device_type type, const char *tag)
		: _20pacgal_state(mconfig, type, tag)
	{ }

	DECLARE_READ8_MEMBER( _25pacman_io_87_r );
	virtual void machine_start() override;
	void _25pacman(machine_config &config);
	void _25pacman_io_map(address_map &map);
	void _25pacman_map(address_map &map);
};