Index: PORTING
==================================================================
--- PORTING
+++ PORTING
@@ -105,11 +105,12 @@
 file, or reading any installed file (even if the file is modified by the
 system administrator).
 
 Games: Debian policy has some specifications that are specific to game
 programs. These probably apply normally to Free Hero Mesh. The set-group-id
-mechanism is not needed; Free Hero Mesh does not share scores. It is OK to
+mechanism is not needed; Free Hero Mesh does not share scores (it might be
+added in future, but would be an optional feature, anyways). It is OK to
 install binaries in /usr/games and man pages in /usr/share/man/man6 but
 the "har" program (which should probably be a separate package) should be
 installed in /usr/bin instead, probably.
 
 X Window System: This is probably not applicable, because SDL is able to
@@ -145,19 +146,23 @@
 it only tests valid solutions, and not parts of the code that should result
 in error messages (although this possibility might be added in future).
 
 
 === Game execution and user interface ===
+
+You may use the existing implementations for user interfaces and will not
+need to write a new implementation; but some ports might need a new user
+interface; if it does, then the below notes may be helpful.
 
 The exec.c and class.c files are the most important files, and can probably
 be used with minor changes even if porting to different systems and/or user
 interfaces. The other files could be omitted, but then those parts must be
 rewritten (possibly in a different programming language); some parts of the
 existing files could be copied if needed.
 
 
-=== Character Encoding ===
+=== Character encoding ===
 
 Free Hero Mesh does not and will not use Unicode. As of this writing, it
 only supports single-byte character codes, although in future it is
 intended that multi-byte codes (e.g. EUC-JP) might also be implemented.
 
@@ -219,20 +224,25 @@
 
 It may be desirable to implement support for importing and exporting PCX
 and Dr.Halo picture formats directly, either built-in or using a separate
 program that is included with it, in the DOS version.
 
+DOS uses CRLF line endings instead of LF only like UNIX does. Free Hero
+Mesh already can read class definition files with or without carriage
+returns. The level import also can read with or without carriage returns.
+However, exports do not add carriage returns.
+
 
 === Amiga ===
 
 (TODO)
 
 
 === Microsoft Windows ===
 
-(TODO)
+The same consideration about line endings with DOS also applies to Windows.
 
 
 === Mac OS X ===
 
 (TODO)