cinap points out that i inverted the test.  how embarassing.

Reference: /n/atom/patch/applied2013/ether63nofct2
Date: Sun Oct 13 05:50:49 CES 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/src/9/pc/ether82563.c	Sun Oct 13 05:50:31 2013
+++ /sys/src/9/pc/ether82563.c	Sun Oct 13 05:50:33 2013
@@ -1830,7 +1830,7 @@
 		csr32w(ctlr, Mta + i*4, 0);
 	csr32w(ctlr, Fcal, 0x00C28001);
 	csr32w(ctlr, Fcah, 0x0100);
-	if(cttab[ctlr->type].flag & Fnofct)
+	if((cttab[ctlr->type].flag & Fnofct) == 0)
 		csr32w(ctlr, Fct, 0x8808);
 	csr32w(ctlr, Fcttv, 0x0100);
 	csr32w(ctlr, Fcrtl, ctlr->fcrtl);
--- /sys/src/9/pcpae/ether82563.c	Sun Oct 13 05:50:36 2013
+++ /sys/src/9/pcpae/ether82563.c	Sun Oct 13 05:50:38 2013
@@ -1830,7 +1830,7 @@
 		csr32w(ctlr, Mta + i*4, 0);
 	csr32w(ctlr, Fcal, 0x00C28001);
 	csr32w(ctlr, Fcah, 0x0100);
-	if(cttab[ctlr->type].flag & Fnofct)
+	if((cttab[ctlr->type].flag & Fnofct) == 0)
 		csr32w(ctlr, Fct, 0x8808);
 	csr32w(ctlr, Fcttv, 0x0100);
 	csr32w(ctlr, Fcrtl, ctlr->fcrtl);
--- /sys/src/nix/k10/ether82563.c	Sun Oct 13 05:50:41 2013
+++ /sys/src/nix/k10/ether82563.c	Sun Oct 13 05:50:43 2013
@@ -1830,7 +1830,7 @@
 		csr32w(ctlr, Mta + i*4, 0);
 	csr32w(ctlr, Fcal, 0x00C28001);
 	csr32w(ctlr, Fcah, 0x0100);
-	if(cttab[ctlr->type].flag & Fnofct)
+	if((cttab[ctlr->type].flag & Fnofct) == 0)
 		csr32w(ctlr, Fct, 0x8808);
 	csr32w(ctlr, Fcttv, 0x0100);
 	csr32w(ctlr, Fcrtl, ctlr->fcrtl);