Seems to me that either the code is wrong, or the comment is.  (My guess
is the code.)

  Nathan

Index: mii_physubr.c
===================================================================
RCS file: /proj/Net/cvs/syssrc/sys/dev/mii/mii_physubr.c,v
retrieving revision 1.30
diff -u -r1.30 mii_physubr.c
--- mii_physubr.c	13 Nov 2001 07:41:37 -0000	1.30
+++ mii_physubr.c	22 Mar 2002 03:22:25 -0000
@@ -100,7 +100,7 @@
 	  GTCR_ADV_1000THDX },

 	/* 1000baseT-FDX */
-	{ BMCR_S1000,		ANAR_CSMA,
+	{ BMCR_S1000|BMCR_FDX,	ANAR_CSMA,
 	  GTCR_ADV_1000TFDX },
 };