diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile
index d34d13e3bd36..a9d3151eab75 100644
--- a/share/man/man4/Makefile
+++ b/share/man/man4/Makefile
@@ -1,14 +1,14 @@
-#	$NetBSD: Makefile,v 1.210 2001/07/25 00:17:19 thorpej Exp $
+#	$NetBSD: Makefile,v 1.211 2001/07/25 22:07:12 thorpej Exp $
 #	@(#)Makefile	8.1 (Berkeley) 6/18/93
 
 MAN=	adv.4 adw.4 ahb.4 ahc.4 an.4 aria.4 atalk.4 audio.4 auich.4 auvia.4 \
 	awi.4 bba.4 bha.4 bktr.4 bpf.4 brgphy.4 cac.4 cardbus.4 ccd.4 \
 	cd.4 ch.4 clcs.4 clct.4 clnp.4 cltp.4 cmpci.4 cms.4 cnw.4 com.4 ddb.4 \
 	de.4 dpt.4 drum.4 eap.4 edc.4 elmc.4 en.4 envsys.4 ep.4 esh.4 \
-	esis.4 esm.4 eso.4 exphy.4 fd.4 fpa.4 fms.4 fxp.4 gre.4 gphyter.4 \
-	gsip.4 hme.4 icmp.4 icsphy.4 idp.4 ifmedia.4 iha.4 inet.4 inphy.4 \
-	intersil7170.4 ioat.4 iop.4 iophy.4 iopsp.4 ip.4 ipip.4 ipkdb.4 \
-	iso.4 isp.4 lc.4 ld.4 lkm.4 lo.4 lxtphy.4 \
+	esis.4 esm.4 eso.4 exphy.4 fd.4 fpa.4 fms.4 fxp.4 gentbi.4 gre.4 \
+	gphyter.4 gsip.4 hme.4 icmp.4 icsphy.4 idp.4 ifmedia.4 iha.4 inet.4 \
+	inphy.4 intersil7170.4 ioat.4 iop.4 iophy.4 iopsp.4 ip.4 ipip.4 \
+	ipkdb.4 iso.4 isp.4 lc.4 ld.4 lkm.4 lo.4 lxtphy.4 \
 	mainbus.4 mbe.4 mca.4 md.4 mhzc.4 midi.4 mii.4 mk48txx.4 mlx.4 \
 	mpu.4 mtio.4 ne.4 neo.4 netintro.4 ns.4 nsip.4 \
 	nsphy.4 nsphyter.4 ntwoc.4 null.4 opl.4 options.4 osiop.4 pas.4 \
diff --git a/share/man/man4/gentbi.4 b/share/man/man4/gentbi.4
new file mode 100644
index 000000000000..ee59fc80c8a5
--- /dev/null
+++ b/share/man/man4/gentbi.4
@@ -0,0 +1,55 @@
+.\"	$NetBSD: gentbi.4,v 1.1 2001/07/25 22:07:12 thorpej Exp $
+.\"
+.\" Copyright (c) 2001 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
+.\" NASA Ames Research Center.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"        This product includes software developed by the NetBSD
+.\"        Foundation, Inc. and its contributors.
+.\" 4. Neither the name of The NetBSD Foundation nor the names of its
+.\"    contributors may be used to endorse or promote products derived
+.\"    from this software without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd July 25, 2001
+.Dt GENTBI 4
+.Os
+.Sh NAME
+.Nm gentbi
+.Nd Driver for generic 1000BASE-X ten-bit interfaces
+.Sh SYNOPSIS
+.Cd "gentbi* at mii? phy ?"
+.Sh DESCRIPTION
+The
+.Nm
+driver supports generic ten-bit interfaces that implement the 1000BASE-X
+protocol, including 1000BASE-SX, 1000BASE-LX, and 1000BASE-CX.
+.Sh SEE ALSO
+.Xr ifmedia 4 ,
+.Xr intro 4 ,
+.Xr mii 4 ,
+.Xr ifconfig 8