xref: /netbsd-src/share/man/man4/man4.vax/hdh.4 (revision 721f013c3dccf382f4ff007505a6e4eeae891802)
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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