--- ./mbr/altmbr.S.orig	2011-12-09 12:28:17.000000000 -0600
+++ ./mbr/altmbr.S	2012-08-17 17:10:33.903688084 -0500
@@ -204,7 +204,7 @@
 5:
 	decb	(partition)
 	jz	boot
-	addw	$16, %bx
+	addw	$16, %si
 	loopw	5b
 
 	popw	%cx			/* %cx <- 4    */