1.\" $OpenBSD: boca.4,v 1.11 2008/05/21 19:05:51 kettenis Exp $ 2.\" 3.\" Copyright (c) 1990, 1991 The Regents of the University of California. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to Berkeley by 7.\" the Systems Programming Group of the University of Utah Computer 8.\" Science Department. 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 3. Neither the name of the University nor the names of its contributors 18.\" may be used to endorse or promote products derived from this software 19.\" without specific prior written permission. 20.\" 21.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31.\" SUCH DAMAGE. 32.\" 33.\" from: @(#)dca.4 5.2 (Berkeley) 3/27/91 34.\" from: Id: com.4,v 1.1 1993/08/06 11:19:07 cgd Exp 35.\" 36.Dd $Mdocdate: May 21 2008 $ 37.Dt BOCA 4 38.Os 39.Sh NAME 40.Nm boca 41.Nd multiplexing serial communications interface 42.Sh SYNOPSIS 43For 4-port BB1004 boards and 8-port BB1008 boards: 44.Pp 45.Cd "boca0 at isa? port 0x100 irq 5" 46.Cd "com* at boca?" 47.Pp 48For 16-port BB2016 boards: 49.Pp 50.Cd "boca0 at isa? port 0x100 irq 5" 51.Cd "boca1 at isa? port 0x140 irq 5" 52.Cd "com* at boca?" 53.Pp 54(The BB2016 is functionally equivalent to two BB1008 boards, 55and is configured as such.) 56.Sh DESCRIPTION 57The 58.Nm 59driver provides support for BOCA Research BB1004, BB1008, and BB2016 60boards that multiplex together up to four, eight, or sixteen 61.Tn EIA 62.Tn RS-232C 63.Pf ( Tn CCITT 64.Tn V.28 ) 65communications interfaces. 66.Pp 67Each 68.Nm 69device is the master device for up to eight 70.Nm com 71devices. 72The kernel configuration specifies these 73.Nm com 74devices as slave devices of the 75.Nm 76device, as shown in 77.Sx SYNOPSIS . 78The slave ID given for each 79.Nm com 80device determines which bit in the interrupt multiplexing register is 81tested to find interrupts for that device. 82The 83.Tn port 84specification for the 85.Nm 86device is used to compute the base addresses for the 87.Nm com 88subdevices and the port for the interrupt multiplexing register. 89.Sh FILES 90.Bl -tag -width Pa 91.It Pa /dev/tty?? 92.El 93.Sh SEE ALSO 94.Xr com 4 , 95.Xr intro 4 , 96.Xr isa 4 97.Sh HISTORY 98The 99.Nm 100driver was written by Charles Hannum, based on the 101.Nm ast 102driver and source code from David Muir Sharnoff. 103David wishes to acknowledge the assistance of Jason Venner in determining 104how to use the BOCA boards. 105