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30 .\" from: @(#)dmc.4 8.1 (Berkeley) 6/5/93
39 .Tn DMC-11 Ns / Ns Tn DMR-11
40 point-to-point serial communications device
42 .Cd "dmc0 at uba0 csr 167600"
44 NOTE: This driver has not been ported from
50 interface provides access to a point-to-point communications
51 device which runs at either 1 Mb/s or 56 Kb/s.
60 interface driver also supports a
63 providing point-to-point
64 communication running at data rates from 2.4 Kb/s to 1 Mb/s.
66 are a more recent design and thus are preferred over
72 constants in the driver may be increased in this case,
75 can accept up to 64 transmit and receive buffers, as opposed
79 The configuration flags specify how to set up the device,
80 .Bl -column 1 description -offset indent
81 .It 0 full duplex DDCMP (normal mode)
82 .It 1 DDCMP Maintenance mode (generally useless)
83 .It 2 DDCMP Half Duplex, primary station
84 .It 3 DDCMP Half Duplex, secondary station
87 The host's address must be specified with an
90 and the destination address specified with a
93 before the interface will transmit or receive any packets.
97 entry in the kernel routing tables for the
104 link between local nets, the route to the remote net must be added manually
107 command, or by the use of the routing process
109 on each end of the link.
112 .It dmc%d: bad control %o.
113 A bad parameter was passed to the
117 .It dmc%d: unknown address type %d.
118 An input packet was received which contained a type of
119 address unknown to the driver.
121 .It DMC fatal error 0%o.
124 occurred, causing the device to be restarted.
126 .It DMC soft error 0%o.
131 .It dmc%d: af%d not supported.
132 The interface was handed a message which has
133 addresses formatted in an unsuitable address family.
144 The current version of the driver uses a link-level encapsulation
145 so that multiple protocol types may be used.
146 It is thus incompatible with earlier drivers,