text: #ifndef __SP0250_H__
  #define __SP0250_H__
  
  struct sp0250_interface {
  	int volume;
  	void (*drq_callback)(int state);
  };
  
  int  sp0250_sh_start( const struct MachineSound *msound );
  void sp0250_sh_stop( void );
  
  WRITE_HANDLER( sp0250_w );
  
  #endif
  