1.\" $NetBSD: hdh.4,v 1.11 2003/08/07 10:31:11 agc 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. The controller itself is not accessible 68to users, but instead provides the hardware support to the 69.Tn IMP 70interface described in 71.Xr imp 4 . 72The configuration entry for the 73.Tn IMP 74must also include the 75.Em pseudo-device 76as shown above in the 77.Sx SYNOPSIS . 78.Sh DIAGNOSTICS 79.Bl -diag 80.It hdh%d: not alive. 81The initialization routine was entered even though the device 82did not autoconfigure. This indicates a system problem. 83.Pp 84.It hdh%d: cannot get chan %d uba resources. 85Insufficient 86.Tn UNIBUS 87resources existed to initialize the device. 88This is likely to be a shortage of 89.Tn UNIBUS 90mapping registers. 91.Pp 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.Pp 102.It hdh%d: LINE DOWN. 103This indicates that the link to the 104.Tn IMP 105has died. 106.Pp 107.It hdh%d: TIMEOUT. 108.It hdh%d: HOST DATA ERROR. 109.It hdh%d: IMP SEQUENCE ERROR. 110.It hdh%d: HOST SEQUENCE ERROR. 111These errors indicate that an 112.Tn HDH 113protocol error has been detected. 114.Pp 115.It hdh%d: cannot get supervisor cmnd buffer. 116This error indicates that an 117.Em mbuf 118could not be allocated to send a command to the 119.Tn IF-11/HDH . 120.El 121.Pp 122Any other error message from hdh%d: indicates a serious error 123detected by either the driver or the 124.Tn IF-11/HDH 125firmware. 126.Sh SEE ALSO 127.Xr netintro 4 128.Sh HISTORY 129The 130.Nm 131driver appeared in 132.Bx 4.3 . 133