sam(1) says ``Text may be typed and edited as in rio(1); also the escape key (ESC) selects (sets dot to) text typed since the last mouse button hit.''
rio(1) has a subsection titled ``Text windows.'' Ctrl-0 isn't a real control sequence (if you look at the output of "ascii", the valid control characters are A through _). What byte are you trying to type? You cannot detect the press of the Alt key - the kernel does that as part of its keyboard handling. Russ
