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Annotation of 43BSDTahoe/man/man4/vax/dmc.4, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1983 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)dmc.4       6.4 (Berkeley) 1/30/87
        !             6: .\"
        !             7: .TH DMC 4 "January 30, 1987"
        !             8: .UC 5
        !             9: .SH NAME
        !            10: dmc \- DEC DMC-11/DMR-11 point-to-point communications device
        !            11: .SH SYNOPSIS
        !            12: .B "device dmc0 at uba0 csr 167600 vector dmcrint dmcxint"
        !            13: .SH DESCRIPTION
        !            14: The
        !            15: .I dmc
        !            16: interface provides access to a point-to-point communications
        !            17: device which runs at either 1 Mb/s or 56 Kb/s.  DMC-11's communicate
        !            18: using the DEC DDCMP link layer protocol.
        !            19: .PP
        !            20: The
        !            21: .I dmc
        !            22: interface driver also supports a DEC DMR-11 providing point-to-point
        !            23: communication running at data rates from 2.4 Kb/s to 1 Mb/s.
        !            24: DMR-11's are a more recent design and thus are preferred over DMC-11's.
        !            25: The NXMT and NRCV constants in the driver may be increased in this case,
        !            26: as the DMR can accept up to 64 transmit and receive buffers, as opposed
        !            27: to 7 for the DMC.
        !            28: .PP
        !            29: The configuration flags specify how to set up the device, 
        !            30: .br
        !            31: 0 -- full duplex DDCMP (normal mode)
        !            32: .br
        !            33: 1 -- DDCMP Maintence mode (generally useless)
        !            34: .br
        !            35: 2 -- DDCMP Half Duplex, primary station
        !            36: .br
        !            37: 3 -- DDCMP Half Duplex, secondary station
        !            38: .ti
        !            39: .PP
        !            40: Several device error counters are available via "adb", for
        !            41: more information see the adb script /usr/lib/adb/dmcstats, or the
        !            42: DMC11 technical manual.
        !            43: .PP
        !            44: The host's address must be specified with an SIOCSIFADDR ioctl,
        !            45: and the destination address specified with a SIOCSIFDSTADDR ioctl,
        !            46: before the interface will transmit or receive any packets.
        !            47: .SH ROUTING
        !            48: The driver places a HOST entry in the kernel routing tables for the
        !            49: address given in the SIOCSIFDSTADDR ioctl.  To use the DMC as a
        !            50: link between local nets, the route to the remote net must be added manually
        !            51: with the
        !            52: .IR route (8)
        !            53: command, or by the use of the routing process
        !            54: .IR routed (8)
        !            55: on each end of the link.
        !            56: .SH DIAGNOSTICS
        !            57: .BR "dmc%d: bad control %o" .
        !            58: A bad parameter was passed to the
        !            59: .I dmcload
        !            60: routine.
        !            61: .PP
        !            62: .BR "dmc%d: unknown address type %d" .
        !            63: An input packet was received which contained a type of
        !            64: address unknown to the driver.
        !            65: .PP
        !            66: .BR "DMC fatal error 0%o" .
        !            67: A fatal error in DDMCP occurred, causing the device to be restarted.
        !            68: .PP
        !            69: .BR "DMC soft error 0%o" .
        !            70: A non-fatal error in DDMCP has occurred. 
        !            71: .PP
        !            72: .BR "dmc%d: af%d not supported" . 
        !            73: The interface was handed a message which has
        !            74: addresses formatted in an unsuitable address family.
        !            75: .SH SEE ALSO
        !            76: intro(4N), inet(4F)
        !            77: .SH BUGS
        !            78: The current version of the driver uses a link-level encapsulation
        !            79: so that multiple protocol types may be used.
        !            80: It is thus incompatible with earlier drivers,
        !            81: including the 4.2BSD version.

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