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@(#)dmc.4 5.1 (Berkeley) 05/15/85

C 5 dmc - DEC DMC-11/DMR-11 point-to-point communications device "device dmc0 at uba0 csr 167600 vector dmcrint dmcxint" The dmc 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.

The dmc 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.

"dmc%d: bad control %o" . A bad parameter was passed to the dmcload routine.

"dmc%d: unknown address type %d" . An input packet was received which contained a type of address unknown to the driver.

"DMC FATAL ERROR 0%o" .

"DMC SOFT ERROR 0%o" .

"dmc%d: af%d not supported" . The interface was handed a message which has addresses formatted in an unsuitable address family.

intro(4N), inet(4F) Should allow multiple outstanding DMA requests, but due to the design of the current UNIBUS support routines this is very difficult.