--- a/doc/TIFFS-IVA-usage	Sat May 20 18:10:49 2017 +0000
+++ b/doc/TIFFS-IVA-usage	Sat May 20 18:28:34 2017 +0000
@@ -13,8 +13,9 @@
 instance under study is organized in terms of flash sectors.  The syntax of
 this argument is KxN, where K is the flash sector size in KiB and N is the
 number of sectors occupied by the FFS.  For MokoFFS images the correct
-organization argument is 64x7 (7 sectors of 64 KiB each); for Pirelli's FFS
-images it is 256x18 (18 sectors of 256 KiB each).
+organization argument is 64x7 (7 sectors of 64 KiB each), for Pirelli's FFS
+images it is 256x18 (18 sectors of 256 KiB each), and for TIFFS images read out
+of FreeCalypso development boards it is 256x8 (8 sectors of 256 KiB each).
 
 The following global options may be given before the image filename argument:
 
@@ -29,10 +30,20 @@
 	device flash dumps of which FFS is only a part, starting somewhere
 	other than at 0.
 
+-O
+
+	The location field in the inode structure is 16 bits rather than 32,
+	stored in the upper two bytes out of the four.  This old FFS format
+	(limited to 1 MiB total FFS size) was used by *very* old versions of
+	TI's firmware and is incompatible with our "current" fw versions;
+	so far the only encountered example of this old FFS format was found on
+	the D-Sample board which the Mother scored in 2015 - it came with a
+	firmware image dated 20020917.
+
 -r ino
 
-	Use the specified inode as the root.  Per Falcon's convention, TIFFS
-	inode numbers are always given in hex, hence this argument is
+	Use the specified inode as the root.  Per the Mother's convention,
+	TIFFS inode numbers are always given in hex, hence this argument is
 	interpreted as hex without needing a 0x prefix.
 
 The invokation syntax for mokoffs and pirffs wrappers is the same as for tiffs,