Some special characters can be inserted in the text, even if the wanted codes aren't "writable" in the Ti-OS editor. For instance, in the Ti-OS font,
the user can be interested by drawing the !^|! character. The corresponding Ti-OS character code is 12. So you have to
insert in his text the following tag:
So every character of the font can be drawn with this tag. The only forbidden character to draw are the characters
with the Ti-OS character code 0 and 10. So !#C000! and !#C010! are forbidden.
Some additionnal characters can be inserted in the text. !#Cxxx! with xxx>256. Not available yet.