1*47672Scael.\" Copyright (c) 1990, 1991 The Regents of the University of California. 244672Sbostic.\" All rights reserved. 344672Sbostic.\" 444672Sbostic.\" This code is derived from software contributed to Berkeley by 544672Sbostic.\" the Systems Programming Group of the University of Utah Computer 644672Sbostic.\" Science Department. 744672Sbostic.\" %sccs.include.redist.man% 844672Sbostic.\" 9*47672Scael.\" @(#)dca.4 5.2 (Berkeley) 03/27/91 1044672Sbostic.\" 11*47672Scael.Dd 12*47672Scael.Dt DCA 4 hp300 13*47672Scael.Os 14*47672Scael.Sh NAME 15*47672Scael.Nm dca 16*47672Scael.Nd 17*47672Scael.Tn HP 98644A 18*47672Scaelcommunications interface 19*47672Scael.Sh SYNOPSIS 20*47672Scael.Cd "device dca0 at scode9 flags 0x1" 21*47672Scael.Sh DESCRIPTION 22*47672ScaelThe 23*47672Scael.Tn 98644A 24*47672Scaelis a single port 25*47672Scael.Tn EIA 26*47672Scael.Tn RS-232C 27*47672Scael.Pf ( Tn CCITT 28*47672Scael.Tn V.28 ) 2944672Sbosticcommunications interface with a single character buffer. 3044672SbosticSuch an interface is built-in to all series 300 machines. 31*47672Scael.Pp 3244672SbosticInput and output for each line may set to one of following baud rates; 33*47672Scael50, 75, 110, 134.5, 150, 300, 600, 1200, 1800, 2400, 4800, 9600 or 34*47672Scael19200. 35*47672Scael.Pp 36*47672ScaelAn optional argument 37*47672Scael.Ar flags 38*47672Scaelmay be set to 1 if the line should be treated as hard-wired 3944672Sbosticwith carrier always present or 0 if modem control is desired. 40*47672Scael.Sh FILES 41*47672Scael.Bl -tag -width Pa 42*47672Scael.It Pa /dev/tty0 43*47672Scael.El 44*47672Scael.Sh DIAGNOSTICS 45*47672Scael.Bl -diag 46*47672Scael.It dca%d: silo overflow. 47*47672ScaelThe single-character input 48*47672Scael.Dq silo 4944672Sbostichas overflowed and incoming data has been lost. 50*47672Scael.El 51*47672Scael.Sh SEE ALSO 52*47672Scael.Xr tty 4 53*47672Scael.Sh HISTORY 54*47672ScaelThe 55*47672Scael.Nm 56*47672Scaeldriver 57*47672Scael.Ud 58*47672Scael.Sh BUGS 5944672SbosticData loss is possible on busy systems with baud rates greater than 300. 6044672SbosticThe 61*47672Scael.Nm dca 6244672Sbostichas never been tested with modem control enabled or on anything but the 6344672Sbosticbuilt-in interface. 64