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/***************************************************************************
Taito Qix hardware
driver by John Butler, Ed Mueller, Aaron Giles
***************************************************************************/
#include "video/mc6845.h"
#define MAIN_CLOCK_OSC 20000000 /* 20 MHz */
#define SLITHER_CLOCK_OSC 21300000 /* 21.3 MHz */
#define SOUND_CLOCK_OSC 7372800 /* 7.3728 MHz */
#define COIN_CLOCK_OSC 4000000 /* 4 MHz */
#define QIX_CHARACTER_CLOCK (20000000/2/16)
typedef struct _qix_state qix_state;
struct _qix_state
{
/* machine state */
UINT8 *_68705_port_out;
UINT8 *_68705_ddr;
UINT8 _68705_port_in[3];
UINT8 coinctrl;
/* video state */
mc6845_t *mc6845;
UINT8 *videoram;
UINT8 *videoram_address;
UINT8 *videoram_mask;
UINT8 *paletteram;
UINT8 flip;
UINT8 palette_bank;
UINT8 leds;
UINT8 *scanline_latch;
};
/*----------- defined in machine/qix.c -----------*/
MACHINE_START( qix );
MACHINE_START( qixmcu );
MACHINE_START( slither );
MACHINE_RESET( qix );
WRITE8_HANDLER( zookeep_bankswitch_w );
READ8_HANDLER( qix_data_firq_r );
READ8_HANDLER( qix_data_firq_ack_r );
WRITE8_HANDLER( qix_data_firq_w );
WRITE8_HANDLER( qix_data_firq_ack_w );
READ8_HANDLER( qix_video_firq_r );
READ8_HANDLER( qix_video_firq_ack_r );
WRITE8_HANDLER( qix_video_firq_w );
WRITE8_HANDLER( qix_video_firq_ack_w );
READ8_HANDLER( qix_68705_portA_r );
READ8_HANDLER( qix_68705_portB_r );
READ8_HANDLER( qix_68705_portC_r );
WRITE8_HANDLER( qix_68705_portA_w );
WRITE8_HANDLER( qix_68705_portB_w );
WRITE8_HANDLER( qix_68705_portC_w );
WRITE8_HANDLER( qix_pia_0_w );
INTERRUPT_GEN( qix_vblank_start );
/*----------- defined in video/qix.c -----------*/
MACHINE_DRIVER_EXTERN( qix_video );
MACHINE_DRIVER_EXTERN( zookeep_video );
MACHINE_DRIVER_EXTERN( slither_video );
WRITE8_HANDLER( qix_flip_screen_w );
WRITE8_HANDLER( qix_palettebank_w );
/*----------- defined in audio/qix.c -----------*/
MACHINE_DRIVER_EXTERN( qix_audio );
MACHINE_DRIVER_EXTERN( slither_audio );
WRITE8_HANDLER( qix_dac_w );
WRITE8_HANDLER( qix_vol_w );
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