int read_entry(char *dir, char *buffer, int count, char *match);
void hourglass_on(void);
void hourglass_off(void);
int file_exists(char *path);
int var_exists(char *var_name);
void var_read(char *var_name, char *buffer);
int scsi_initialise(int device, char *buf, int len); /* 1 for fail */
int scsi_status(int device);
int vram_size(void);
