void remote_close (void);
void write_ok (char *buf);
void write_enn (char *buf);
+void initialize_async_io (void);
void enable_async_io (void);
void disable_async_io (void);
-void unblock_async_io (void);
-void block_async_io (void);
void check_remote_input_interrupt_request (void);
void convert_ascii_to_int (char *from, unsigned char *to, int n);
void convert_int_to_ascii (unsigned char *from, char *to, int n);