--- xinu/h/xebec.h	2018/04/24 17:39:02	1.1.1.1
+++ xinu/h/xebec.h	2018/04/24 17:39:15	1.1.1.2
@@ -2,15 +2,22 @@
 
 /* Xebec S1410 5.25 inch Winchester Disk Controller */
 
+/*=============================================================================
+ * The following is structure of the Xebec disk controller registers.
+ *	You may notice that every other byte has been swapped.  This is due
+ *	to the way the 68000 does byte transfers.  See the User's Manual for
+ *	details. 
+ *=============================================================================
+ */
 struct	xbdcb	{			/* Xebec disk controller regs.	*/
-	char	xop;			/* command class/opcode		*/
 	char	xunit;			/* unit/high-order address bits	*/
-	char	xmaddr;			/* middle-order address bits	*/
+	char	xop;			/* command class/opcode		*/
 	char	xladdr;			/* low-order address bits	*/
-	char	xcount;			/* block count			*/
+	char	xmaddr;			/* middle-order address bits	*/
 	char	xcntl;			/* control field		*/
-	char	xres1;			/* reserved field #1		*/
+	char	xcount;			/* block count			*/
 	char	xres2;			/* reserved field #2		*/
+	char	xres1;			/* reserved field #1		*/
 };
 
 /* Xebec controller operation codes */