dmc \- DEC DMC-11/DMR-11 point-to-point communications device
.B "device dmc0 at uba0 csr 167600 vector dmcrint dmcxint"
interface provides access to a point-to-point communications
device which runs at either 1 Mb/s or 56 Kb/s. DMC-11's communicate
using the DEC DDCMP link layer protocol.
interface driver also supports a DEC DMR-11 providing point-to-point
communication running at data rates from 2.4 Kb/s to 1 Mb/s.
DMR-11's are a more recent design and thus are preferred over DMC-11's.
The host's address must be specified with an SIOCSIFADDR ioctl
before the interface will transmit or recive any packets.
.BR "dmc%d: bad control %o" .
A bad parameter was passed to the
.BR "dmc%d: unknown address type %d" .
An input packet was received which contained a type of
address unknown to the driver.
.BR "DMC FATAL ERROR 0%o" .
.BR "DMC SOFT ERROR 0%o" .
.BR "dmc%d: af%d not supported" .
The interface was handed a message which has
addresses formatted in an unsuitable address family.
Should allow multiple outstanding DMA requests, but due to
the design of the current UNIBUS support routines this is