Thanks Eklavya, now I know which codes are free for me to use.
Originally Posted by DavidMcCann
If you mean that you need to add characters to a font, you just need to install Fontforge. If you mean something else, then I didn't understand you :-(
No, I need to add actual characters to an ASCII table.
I found some tables in usr/share/i18n/supported
But they weren't images that I could edit.
When I "man ASCII" it tells me about character codes but not where the graphical table is located, perhaps I'll need to even use some Assembly Language to manipulate them, I dunno?
(they might not be graphical tables but some Machine code)