1.\" Copyright (c) 1990, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the Systems Programming Group of the University of Utah Computer 6.\" Science Department. 7.\" 8.\" %sccs.include.redist.man% 9.\" 10.\" @(#)dca.4 8.1 (Berkeley) 06/09/93 11.\" 12.Dd 13.Dt DCA 4 hp300 14.Os 15.Sh NAME 16.Nm dca 17.Nd 18.Tn HP 98644A 19communications interface 20.Sh SYNOPSIS 21.Cd "device dca0 at scode9 flags 0x1" 22.Sh DESCRIPTION 23The 24.Tn 98644A 25is a single port 26.Tn EIA 27.Tn RS-232C 28.Pf ( Tn CCITT 29.Tn V.28 ) 30communications interface with a single character buffer. 31Such an interface is built-in to all series 300 machines. 32.Pp 33Input and output for each line may set to one of following baud rates; 3450, 75, 110, 134.5, 150, 300, 600, 1200, 1800, 2400, 4800, 9600 or 3519200. 36.Pp 37An optional argument 38.Ar flags 39may be set to 1 if the line should be treated as hard-wired 40with carrier always present or 0 if modem control is desired. 41.Sh FILES 42.Bl -tag -width Pa 43.It Pa /dev/tty0 44.El 45.Sh DIAGNOSTICS 46.Bl -diag 47.It dca%d: silo overflow. 48The single-character input 49.Dq silo 50has overflowed and incoming data has been lost. 51.El 52.Sh SEE ALSO 53.Xr tty 4 54.Sh BUGS 55Data loss is possible on busy systems with baud rates greater than 300. 56The 57.Nm dca 58has never been tested with modem control enabled or on anything but the 59built-in interface. 60