I finally had some time to look at the TC Ethernet card in the Alpha
3000/xxx last weekend, and think I've got it fixed.  If anyone wants to
verify the fix, here's the patch.  I can also provide a 1.6 GENERIC kernel
if needed.

Index: if_le_tc.c
===================================================================
RCS file: /cvsroot/syssrc/sys/dev/tc/if_le_tc.c,v
retrieving revision 1.15
diff -u -r1.15 if_le_tc.c
--- if_le_tc.c	2002/10/02 16:53:03	1.15
+++ if_le_tc.c	2002/12/10 04:15:00
@@ -97,7 +97,8 @@
 	 * It's on the turbochannel proper, or a kn02
 	 * baseboard implementation of a TC option card.
 	 */
-	lesc->sc_r1 = (struct lereg1 *)(d->ta_addr + LE_OFFSET_LANCE);
+	lesc->sc_r1 = (struct lereg1 *)
+	    TC_DENSE_TO_SPARSE(TC_PHYS_TO_UNCACHED(d->ta_addr + LE_OFFSET_LANCE));
 	sc->sc_mem = (void *)(d->ta_addr + LE_OFFSET_RAM);

 	sc->sc_copytodesc = lance_copytobuf_contig;

--
Michael L. Hitch			mhitch@montana.edu
Computer Consultant
Information Technology Center
Montana State University	Bozeman, MT	USA