1.\" $NetBSD: hdh.4,v 1.13 2017/08/01 11:11:17 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. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" from: @(#)hdh.4 8.1 (Berkeley) 6/5/93 31.\" 32.Dd June 5, 1993 33.Dt HDH 4 vax 34.Os 35.Sh NAME 36.Nm hdh 37.Nd 38.Tn ACC 39.Tn IF-11/HDH 40.Tn IMP 41network interface 42.Sh SYNOPSIS 43.Cd "pseudo-device imp" 44.Cd "hdh0 at uba0 csr 166740 vector hdhintr" 45.Sh DESCRIPTION 46NOTE: This driver has not been ported from 47.Bx 4.4 48yet. 49.Pp 50NOTE: At the moment, 51.Nx 52does not support 53.Tn IMP , 54so this manual page is not relevant. 55.Pp 56The 57.Nm hdh 58device provides an 59.Tn HDLC 60Host 61.Pq Tn HDH 62interface to an 63.Tn IMP . 64It is normally used when participating 65in the 66.Tn DARPA 67Internet. 68The controller itself is not accessible 69to users, but instead provides the hardware support to the 70.Tn IMP 71interface described in 72.Xr imp 4 . 73The configuration entry for the 74.Tn IMP 75must also include the 76.Em pseudo-device 77as shown above in the 78.Sx SYNOPSIS . 79.Sh DIAGNOSTICS 80.Bl -diag 81.It hdh%d: not alive. 82The initialization routine was entered even though the device 83did not autoconfigure. 84This indicates a system problem. 85.It hdh%d: cannot get chan %d uba resources. 86Insufficient 87.Tn UNIBUS 88resources existed to initialize the device. 89This is likely to be a shortage of 90.Tn UNIBUS 91mapping registers. 92.It hdh%d: LINE UP. 93This indicates that both the 94.Tn HDLC 95and 96.Tn HDH 97protocols have declared the 98link to the 99.Tn IMP 100alive. 101.It hdh%d: LINE DOWN. 102This indicates that the link to the 103.Tn IMP 104has died. 105.It hdh%d: TIMEOUT. 106.It hdh%d: HOST DATA ERROR. 107.It hdh%d: IMP SEQUENCE ERROR. 108.It hdh%d: HOST SEQUENCE ERROR. 109These errors indicate that an 110.Tn HDH 111protocol error has been detected. 112.It hdh%d: cannot get supervisor cmnd buffer. 113This error indicates that an 114.Em mbuf 115could not be allocated to send a command to the 116.Tn IF-11/HDH . 117.El 118.Pp 119Any other error message from hdh%d: indicates a serious error 120detected by either the driver or the 121.Tn IF-11/HDH 122firmware. 123.Sh SEE ALSO 124.Xr netintro 4 125.Sh HISTORY 126The 127.Nm 128driver appeared in 129.Bx 4.3 . 130