text: /***************************************************************************
  
      Galivan - Cosmo Police
  
  ***************************************************************************/
  
  class galivan_state : public driver_data_t
  {
  public:
  	static driver_data_t *alloc(running_machine &machine) { return auto_alloc_clear(&machine, galivan_state(machine)); }
  
  	galivan_state(running_machine &machine)
  		: driver_data_t(machine) { }
  
  	/* memory pointers */
  	UINT8 *     videoram;
  	UINT8 *     colorram;
  	UINT8 *     spriteram;
  	size_t      videoram_size;
  	size_t      spriteram_size;
  
  	/* video-related */
  	tilemap_t     *bg_tilemap, *tx_tilemap;
  	UINT8       scrollx[2], scrolly[2];
  	UINT8       flipscreen;
  	UINT8       write_layers, layers;
  	UINT8       ninjemak_dispdisable;
  };
  
  
  
  /*----------- defined in video/galivan.c -----------*/
  
  WRITE8_HANDLER( galivan_scrollx_w );
  WRITE8_HANDLER( galivan_scrolly_w );
  WRITE8_HANDLER( galivan_videoram_w );
  WRITE8_HANDLER( galivan_colorram_w );
  WRITE8_HANDLER( galivan_gfxbank_w );
  WRITE8_HANDLER( ninjemak_scrollx_w );
  WRITE8_HANDLER( ninjemak_scrolly_w );
  WRITE8_HANDLER( ninjemak_gfxbank_w );
  
  PALETTE_INIT( galivan );
  
  VIDEO_START( galivan );
  VIDEO_START( ninjemak );
  VIDEO_UPDATE( galivan );
  VIDEO_UPDATE( ninjemak );
  