* Emacs compiled for MSDOS cannot find some Lisp files, or other
run-time support files, when long filename support is enabled.
-(Usually, this problem will manifest itself when Emacs exits
+
+Usually, this problem will manifest itself when Emacs exits
immediately after flashing the startup screen, because it cannot find
the Lisp files it needs to load at startup. Redirect Emacs stdout
-and stderr to a file to see the error message printed by Emacs.)
+and stderr to a file to see the error message printed by Emacs.
+
+Another manifestation of this problem is that Emacs is unable to load
+the support for editing program sources in languages such as C and
+Lisp.
This can happen if the Emacs distribution was unzipped without LFN
support, thus causing long filenames to be truncated to the first 6
compiled with DJGPP v2). The MSDOG section of the file INSTALL
explains this issue in more detail.
+Another possible reason for such failures is that Emacs compiled for
+MSDOS is used on Windows NT, where long file names are not supported
+by this version of Emacs, but the distribution was unpacked by an
+unzip program that preserved the long file names instead of truncating
+them to DOS 8+3 limits. To be useful on NT, the MSDOS port of Emacs
+must be unzipped by a DOS utility, so that long file names are
+properly truncated.
+
* Emacs compiled with DJGPP complains at startup:
"Wrong type of argument: internal-facep, msdos-menu-active-face"