Pointers on adding encodings?

[Phil!Gregory]

I think I'm finally going to get around to adding CP437 support to screen.
It looks like what I have to do is add an entry for it to encodings[] in
encodings.c, with the value for deffont corresponding to a filename in the
utf8encodings directory.  From the look of things, charsets, usegr, noc1,
and fontlist can all be null; is that correct?

How were the current values for deffont chosen?  Can I just pick something
out of the air, or is there a scheme I should follow?

The files seem to be null-separated mappings of charset codepoints to
Unicode codepoints, with some header information.  Is there some tool
around to make editing the files easier?

-- 
...computer contrarian of the first order... / http://aperiodic.net/phil/
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