#define EJECT_TRAY 0
#define RESET 2
#define CLOSE_TRAY 5
#define DATA_TRACK 64
#define LOCK 1
#define UNLOCK 0

typedef struct playinfo {
  unsigned char control;
  unsigned char adr;
  unsigned char track;
  unsigned char index;
  unsigned char min;
  unsigned char sec;
  unsigned char frame;
  unsigned char zero;
  unsigned char amin;
  unsigned char asec;
  unsigned char aframe;
};

typedef struct volumeinfo {
    unsigned char mode;
    unsigned char input0;
    unsigned char volume0;
    unsigned char input1;
    unsigned char volume1;
    unsigned char input2;
    unsigned char volume2;
    unsigned char input3;
    unsigned char volume3;
};


extern struct {
  unsigned short drives;
  unsigned char  first_drive;
  unsigned short current_track;
  unsigned long  track_position;
  unsigned char  track_type;
  unsigned char  low_audio;
  unsigned char  high_audio;
  unsigned char  disk_length_min;
  unsigned char  disk_length_sec;
  unsigned char  disk_length_frames;
  unsigned long	 endofdisk;
  unsigned char  upc[7];
  unsigned char  diskid[6];
  unsigned long  status;
  unsigned short error;
} cdrom_data;


extern unsigned long cd_head_position (void);
extern void cd_get_volume (struct volumeinfo *vol);
extern void cd_set_volume (struct volumeinfo *vol);
extern short cd_getupc (void);
extern void cd_get_audio_info (void);
extern void cd_set_track (short tracknum);
extern void cd_track_length (short tracknum, unsigned char *min, unsigned char *sec, unsigned char *frame);
extern void cd_status (void);
extern void cd_seek (unsigned long location);
extern void cd_play_audio (unsigned long begin, unsigned long end);
extern void cd_stop_audio (void);
extern void cd_resume_audio (void);
extern void cd_cmd (unsigned char mode);
extern void cd_getpos (struct playinfo *info);
extern short cdrom_installed (void);
extern short cd_done_play (void);
extern short cd_mediach (void);
extern void cd_lock (unsigned char doormode);
