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+rtf2troff:
+
+You need bcopy.  If you don't have one, you can write it easily.  The
+prototype is:
+
+	bcopy (char *src, char *dest, int nBytes);
+
+copy nButes from source "src" to destination "dest".  Some implementations
+work for overlapping source and destination, but that is not necessary
+for rtf2troff.  If you don't have bcopy, but you do have memcpy, bcopy
+can be implemented as
+
+	# define	bcopy(a,b,c)	(void) memcpy(b,a,c)
+
+On a Macintosh you can use
+
+	# define	bcopy(a,b,c)	BlockMove(a,b,c)
+
+-------------------
+Some functions take a variable number of arguments; varargs.h is used
+if you have it.  This is all controlled by VARARGS in the Makefile.
+If you use imake, the correct value should be selected automatically,
+otherwise you'll have to set it by hand.
+
+-------------------
+The table used to translate non-ASCII (> 127) characters are incomplete,
+and it is possible that the special sequences used to represent
+special characters are not present in all troff's.  Check against your
+local documentation.  Take a look at trf-charmap.c.
+-------------------