--- zzzz-none-000/linux-3.10.107/Documentation/filesystems/vfat.txt	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/Documentation/filesystems/vfat.txt	2021-02-04 17:41:59.000000000 +0000
@@ -172,6 +172,11 @@
 		To maintain backward compatibility, '-o nfs' is also accepted,
 		defaulting to stale_rw
 
+dos1xfloppy  -- If set, use a fallback default BIOS Parameter Block
+		configuration, determined by backing device size. These static
+		parameters match defaults assumed by DOS 1.x for 160 kiB,
+		180 kiB, 320 kiB, and 360 kiB floppies and floppy images.
+
 
 <bool>: 0,1,yes,no,true,false