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(MS-DOS and MULE): IBM graphics characters are no longer displayed

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as dos-unsupported-character-glyph.
This commit is contained in:
Eli Zaretskii 2001-04-06 11:12:12 +00:00
parent 3ffb33bb50
commit e18c8fa892
1 changed files with 11 additions and 5 deletions
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16
man/msdog.texi
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@ -668,14 +668,20 @@ knows the language.) Even though the character may occupy several
columns on the screen, it is really still just a single character, and
all Emacs commands treat it as one.
@vindex dos-unsupported-character-glyph
@cindex IBM graphics characters (MS-DOS)
@cindex box-drawing characters (MS-DOS)
@cindex line-drawing characters (MS-DOS)
Not all characters in DOS codepages correspond to ISO 8859
characters---some are used for other purposes, such as box-drawing
characters and other graphics. Emacs cannot represent these characters
internally, so when you read a file that uses these characters, they are
converted into a particular character code, specified by the variable
@code{dos-unsupported-character-glyph}.
characters and other graphics. Emacs maps these characters to two
special character sets called @code{eight-bit-control} and
@code{eight-bit-graphic}, and displays them as their IBM glyphs.
However, you should be aware that other systems might display these
characters differently, so you should avoid them in text that might be
copied to a different operating system, or even to another DOS machine
that uses a different codepage.
@vindex dos-unsupported-character-glyph
Emacs supports many other characters sets aside from ISO 8859, but it
cannot display them on MS-DOS. So if one of these multibyte characters
appears in a buffer, Emacs on MS-DOS displays them as specified by the