CHARS
if ((chr - ' ') > (CHARS - 1)) {
#define FONT_WIDTH (CHAR_WIDTH * CHARS) /* font width in pixels */
if ((CHARS/2 + CHARS%2) < max_chars_line)
max_chars_line = CHARS/2 + CHARS%2;
if ((CHARS/2 + CHARS%2) < max_chars_line)
max_chars_line = (CHARS/2 + CHARS%2) - max_chars_line; /* 95 - 64 */