1275970ScyNote that all \[charXXX] entity names have been removed from the font files.
2275970ScyThey don't make sense for Unicode.
3275970Scy
4275970ScyThe following entity from the original troff manual (by Ossanna and
5275970ScyKernighan) is unmapped:
6275970Scy
7275970Scy  bs    shaded solid ball (Bell System logo, AT&T logo)
8275970Scy
9330567SgordonCharacter 0x002D has not been given a name because its Unicode name
10275970ScyHYPHEN-MINUS is so ambiguous that it is unusable for serious typographic
11275970Scyuse.
12275970Scy
13275970Scy\[wp] has been mapped to 0x2118, because according to Unicode 4.1's
14275970ScyNamesList.txt, U+2118 SCRIPT CAPITAL P is really a Weierstrass `p',
15275970Scyneither SCRIPT not CAPITAL.
16275970Scy
17330567SgordonThe following line could be added; \[space] is known to devps but is not
18330567Sgordondocumented and not known to devdvi (actually, there is no space glyph within
19275970Scythe TeX system).
20275970Scy
21275970Scy  space   24   0   0x0020
22275970Scy
23275970Scydevps maps \[a~] and `~' to `asciitilde', which is equivalent to 0x02DC, but
24275970Scythis glyph is just too small.  We map them to 0x007E instead.
25275970Scy
26275970Scydevps maps \[a^] and `^' to `circumflex', which is equivalent to 0x02C6, but
27275970Scythis glyph is just too small.  We map them to 0x005E instead.
28275970Scy
29275970Scydevps maps \[*U] to `Upsilon1', which is equivalent to 0x03D2.  We map it to
30275970Scy0x03A5 instead.
31275970Scy
32275970Scydevps maps \[*W] to `Omega', which is equivalent to either 0x2126 or 0x03A9.
33275970ScyWe map it to 0x03A9.
34275970Scy
35275970Scydevps maps \[*D] to `Delta', which is equivalent to either 0x2206 or 0x0394.
36275970ScyWe map it to 0x0394.
37275970Scy
38275970Scy
39275970ScyAdding Unicode characters
40275970Scy-------------------------
41275970Scy
42275970ScyAssume you want to use a Unicode character not provided in the list, say
43275970ScyU+20AC. You need to do two things:
44275970Scy
45275970Scy- Add a line
46275970Scy
47275970Scy    u20AC   24   0   0x20AC
48275970Scy
49275970Scy  (the second column is computed as 24 * wcwidth(0x20AC)) to the file
50275970Scy  R.proto, or, when groff is already installed, to the four fonts files in
51275970Scy  $(prefix)/share/groff/<version>/font/devutf8/.
52275970Scy
53275970Scy- In your source file, use the notation \[u20AC] to access it.
54275970Scy