DMV(4) | Device Drivers Manual (vax) | DMV(4)

# NAME

`dmv` — DEC DMV-11 point-to-point serial communications device

# SYNOPSIS

`dmv0 at uba0 csr 167000 vector dmvrint dmvxint`

# DESCRIPTION

NOTE: This driver has not been ported from 4.4BSD yet.

The `dmv` interface provides access to a point-to-point communications device which runs at up to 56 Kb/s. DMV-11s communicate using the DEC DDCMP link layer protocol.

The host's address must be specified with an `SIOCSIFADDR` ioctl(2), and the destination address specified with a `SIOCSIFDSTADDR` ioctl(2), before the interface will transmit or receive any packets.

# ROUTING

The driver places a HOST entry in the kernel routing tables for the address given in the `SIOCSIFDSTADDR` ioctl(2). To use the DMV as a link between local nets, the route to the remote net must be added manually with the route(8) command, or by the use of the routing process routed(8) on each end of the link.

# DIAGNOSTICS

dmvprobe: can't start device.
dmvprobe: device init failed, bsel4=%o, bsel6=%o.
  The probe routine was unable to start the device.
dmvinit: dmv%d not running.
dmvrestart: can't start device.
dmv%d: device init failed, bsel4=%o, bsel6=%o.
  The initialization/restart routine was unable to start the device.
dmv%d: far end on-line.
  The other end of the connection has come online.
dmv%d: far end restart.
  The other end of the line has restarted.
dmv%d: bad control %o.
  A bad parameter was passed to the dmvload routine.
dmvxint: dmv%d bad rcv pkt addr 0x%x len 0x%x.
  A bad packet was received.
dmv%d: bad packet address 0x%x.
  An input packet was received which contained a type of address unknown to the driver.
dmvxint: dmv%d unallocated packet 0x%x.
  A protocol error has occurred with the board.
dmvoutput, dmv%d can't handle af%d.
  A packet for an unsupported address family has been sent.
dmv%d: output timeout, bsel0=%b bsel2=%b.
  A device timeout occurred.

Numerous other device errors may be displayed.

# SEE ALSO

inet(4), vax/dmc(4), vax/intro(4)

# HISTORY

The `dmv` driver appeared in 4.3BSD-Tahoe.

February 17, 2017 | NetBSD 11.0