* then <code>res</code> will be %TRUE (1) if that character can be typed by the
* player in line input, and %FALSE (0) if not. Note that if <code>ch</code> is
* a nonprintable Latin-1 character (0 to 31, 127 to 159), then this is
* then <code>res</code> will be %TRUE (1) if that character can be typed by the
* player in line input, and %FALSE (0) if not. Note that if <code>ch</code> is
* a nonprintable Latin-1 character (0 to 31, 127 to 159), then this is