gbranden pushed a commit to branch master
in repository groff.
commit 55ddc275a55c84c068451fe4aedd9579e82d413b
Author: G. Branden Robinson <[email protected]>
AuthorDate: Sun Oct 23 19:02:13 2022 -0500
groff_tmac(5): Revise input encodings discussion.
---
man/groff_tmac.5.man | 54 +++++++++++++++++++++++-----------------------------
1 file changed, 24 insertions(+), 30 deletions(-)
diff --git a/man/groff_tmac.5.man b/man/groff_tmac.5.man
index f5baa79d2..8def5aa26 100644
--- a/man/groff_tmac.5.man
+++ b/man/groff_tmac.5.man
@@ -417,48 +417,42 @@ Chinese.
.I latin5
.TQ
.I latin9
-Various input encodings supported directly by groff.
-.
-Normally, this macro is loaded at the very beginning of a document or
-specified as the first macro argument on the command line.
+are various ISO\~8859 input encodings supported by
+.IR groff .
.
+On systems using ISO character encodings,
.I groff
-loads latin1 by default at startup.
+loads
+.I latin1.tmac
+automatically at startup.
.
-These macro packages don't work on EBCDIC hosts.
+A document that uses Latin-2,
+Latin-5,
+or Latin-9
+can specify one of these alternative encodings.
.
.
.TP
.I cp1047
-Encoding support for EBCDIC.
-.
-On those platforms it is loaded automatically at startup.
+provides support for EBCDIC-based systems.
.
-Due to different character ranges used in
+On those platforms,
.I groff
-it doesn't work on architectures which are based on ASCII.
-.
-.
-.P
-Some input encoding characters may not be available for a particular
-output device.
-.
-For example, saying
+loads
+.I cp1047.tmac
+automatically at startup.
.
-.P
-.EX
-groff \-Tlatin1 \-mlatin9 ...
-.EE
.
.P
-fails if you use the Euro character in the input.
-.
-Usually, this limitation is present only for drivers which have a
-limited set of output glyphs
-.RB ( ascii ,
-.BR latin1 );
-for other drivers it is usually sufficient to install proper
-fonts which contain the necessary glyphs.
+Because different input character codes constitute valid GNU
+.I troff \" GNU
+input on ISO and EBCDIC systems,
+the
+.I latin
+macro files cannot be used on EBCDIC systems,
+and
+.I cp1047
+cannot be used on ISO systems.
.
.
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