void ascii_test_write (struct output_driver *,
const char *s, int x, int y, unsigned int options);
void ascii_test_set_length (struct output_driver *, int y, int length);
void ascii_test_write (struct output_driver *,
const char *s, int x, int y, unsigned int options);
void ascii_test_set_length (struct output_driver *, int y, int length);