1.\" $NetBSD: hdh.4,v 1.10 2001/08/18 14:37:45 wiz Exp $ 2.\" 3.\" Copyright (c) 1983, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" from: @(#)hdh.4 8.1 (Berkeley) 6/5/93 35.\" 36.Dd June 5, 1993 37.Dt HDH 4 vax 38.Os 39.Sh NAME 40.Nm hdh 41.Nd 42.Tn ACC 43.Tn IF-11/HDH 44.Tn IMP 45network interface 46.Sh SYNOPSIS 47.Cd "pseudo-device imp" 48.Cd "hdh0 at uba0 csr 166740 vector hdhintr" 49.Sh DESCRIPTION 50NOTE: This driver has not been ported from 51.Bx 4.4 52yet. 53.Pp 54NOTE: At the moment, 55.Nx 56does not support 57.Tn IMP , 58so this manual page is not relevant. 59.Pp 60The 61.Nm hdh 62device provides an 63.Tn HDLC 64Host 65.Pq Tn HDH 66interface to an 67.Tn IMP . 68It is normally used when participating 69in the 70.Tn DARPA 71Internet. The controller itself is not accessible 72to users, but instead provides the hardware support to the 73.Tn IMP 74interface described in 75.Xr imp 4 . 76The configuration entry for the 77.Tn IMP 78must also include the 79.Em pseudo-device 80as shown above in the 81.Sx SYNOPSIS . 82.Sh DIAGNOSTICS 83.Bl -diag 84.It hdh%d: not alive. 85The initialization routine was entered even though the device 86did not autoconfigure. This indicates a system problem. 87.Pp 88.It hdh%d: cannot get chan %d uba resources. 89Insufficient 90.Tn UNIBUS 91resources existed to initialize the device. 92This is likely to be a shortage of 93.Tn UNIBUS 94mapping registers. 95.Pp 96.It hdh%d: LINE UP. 97This indicates that both the 98.Tn HDLC 99and 100.Tn HDH 101protocols have declared the 102link to the 103.Tn IMP 104alive. 105.Pp 106.It hdh%d: LINE DOWN. 107This indicates that the link to the 108.Tn IMP 109has died. 110.Pp 111.It hdh%d: TIMEOUT. 112.It hdh%d: HOST DATA ERROR. 113.It hdh%d: IMP SEQUENCE ERROR. 114.It hdh%d: HOST SEQUENCE ERROR. 115These errors indicate that an 116.Tn HDH 117protocol error has been detected. 118.Pp 119.It hdh%d: cannot get supervisor cmnd buffer. 120This error indicates that an 121.Em mbuf 122could not be allocated to send a command to the 123.Tn IF-11/HDH . 124.El 125.Pp 126Any other error message from hdh%d: indicates a serious error 127detected by either the driver or the 128.Tn IF-11/HDH 129firmware. 130.Sh SEE ALSO 131.Xr netintro 4 132.Sh HISTORY 133The 134.Nm 135driver appeared in 136.Bx 4.3 . 137