DCA(4)                OpenBSD Programmer's Manual (HP300)               DCA(4)

NAME
     dca - HP 98644A serial communications interface

SYNOPSIS
     dca0 at dio? scode 9 flags 1

DESCRIPTION
     The 98644A is a single port EIA RS-232C (CCITT V.28) communications in-
     terface with a single character buffer.  Such an interface is built-in to
     all series 300 machines.

     Input and output for each line may set to one of following baud rates:
     50, 75, 110, 134.5, 150, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200,
     38400.

     An optional argument flags may be set to 1 if the line should be treated
     as hard-wired with carrier always present or 0 if modem control is de-
     sired.

FILES
     /dev/tty0

     /dev/cua0

DIAGNOSTICS
     dca%d: silo overflow.  The single-character input ``silo'' has overflowed
     and incoming data has been lost.

SEE ALSO
     tty(4)

BUGS
     Data loss is possible on busy systems with baud rates greater than 300.
     The dca has never been tested with modem control enabled or on anything
     but the built-in interface.

OpenBSD 3.0                      June 9, 1993                                1
