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

    Sega G-80 raster hardware

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

#include "machine/segag80.h"

class segag80r_state : public driver_device
{
public:
	segag80r_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag) { }

	UINT8 m_sound_state[2];
	UINT8 m_sound_rate;
	UINT16 m_sound_addr;
	UINT8 m_sound_data;
	UINT8 m_square_state;
	UINT8 m_square_count;
	emu_timer *m_sega005_sound_timer;
	sound_stream *m_sega005_stream;
	UINT8 m_n7751_command;
	UINT8 m_n7751_busy;
	UINT8 *m_videoram;
	segag80_decrypt_func m_decrypt;
	UINT8 *m_mainram;
	UINT8 m_background_pcb;
	double m_rweights[3];
	double m_gweights[3];
	double m_bweights[2];
	UINT8 m_video_control;
	UINT8 m_video_flip;
	UINT8 m_vblank_latch;
	tilemap_t *m_spaceod_bg_htilemap;
	tilemap_t *m_spaceod_bg_vtilemap;
	UINT16 m_spaceod_hcounter;
	UINT16 m_spaceod_vcounter;
	UINT8 m_spaceod_fixed_color;
	UINT8 m_spaceod_bg_control;
	UINT8 m_spaceod_bg_detect;
	tilemap_t *m_bg_tilemap;
	UINT8 m_bg_enable;
	UINT8 m_bg_char_bank;
	UINT16 m_bg_scrollx;
	UINT16 m_bg_scrolly;
	UINT8 m_pignewt_bg_color_offset;
};


/*----------- defined in audio/segag80r.c -----------*/

MACHINE_CONFIG_EXTERN( astrob_sound_board );
MACHINE_CONFIG_EXTERN( 005_sound_board );
MACHINE_CONFIG_EXTERN( spaceod_sound_board );
MACHINE_CONFIG_EXTERN( monsterb_sound_board );

WRITE8_HANDLER( astrob_sound_w );

WRITE8_HANDLER( spaceod_sound_w );


/*----------- defined in video/segag80r.c -----------*/

#define G80_BACKGROUND_NONE			0
#define G80_BACKGROUND_SPACEOD		1
#define G80_BACKGROUND_MONSTERB		2
#define G80_BACKGROUND_PIGNEWT		3
#define G80_BACKGROUND_SINDBADM		4


INTERRUPT_GEN( segag80r_vblank_start );

WRITE8_HANDLER( segag80r_videoram_w );

READ8_HANDLER( segag80r_video_port_r );
WRITE8_HANDLER( segag80r_video_port_w );

VIDEO_START( segag80r );
SCREEN_UPDATE( segag80r );


READ8_HANDLER( spaceod_back_port_r );
WRITE8_HANDLER( spaceod_back_port_w );


WRITE8_HANDLER( monsterb_videoram_w );
WRITE8_HANDLER( monsterb_back_port_w );


WRITE8_HANDLER( pignewt_videoram_w );
WRITE8_HANDLER( pignewt_back_port_w );
WRITE8_HANDLER( pignewt_back_color_w );


INTERRUPT_GEN( sindbadm_vblank_start );

WRITE8_HANDLER( sindbadm_videoram_w );
WRITE8_HANDLER( sindbadm_back_port_w );