1.\" $NetBSD: ioat.4,v 1.4 2001/09/22 00:57:41 wiz 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. All advertising materials mentioning features or use of this software 18.\" must display the following acknowledgement: 19.\" This product includes software developed by the University of 20.\" California, Berkeley and its contributors. 21.\" 4. Neither the name of the University nor the names of its contributors 22.\" may be used to endorse or promote products derived from this software 23.\" without specific prior written permission. 24.\" 25.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35.\" SUCH DAMAGE. 36.\" 37.\" from: NetBSD: boca.4,v 1.3 1999/03/16 01:19:15 garbled Exp 38.\" from: @(#)dca.4 5.2 (Berkeley) 3/27/91 39.\" from: Id: com.4,v 1.1 1993/08/06 11:19:07 cgd Exp 40.\" 41.Dd January 24, 2000 42.Dt IOAT 4 43.Os 44.Sh NAME 45.Nm ioat 46.Nd 47multiplexing serial communications interface 48.Sh SYNOPSIS 49For 6-port BOCA IOAT66 board: 50.Pp 51.Cd "ioat0 at isa? port 0x220 irq 5 52.Cd "com2 at ioat? slave ?" 53.Cd "com3 at ioat? slave ?" 54.Cd "com4 at ioat? slave ?" 55.Cd "com5 at ioat? slave ?" 56.Cd "com6 at ioat? slave ?" 57.Cd "com7 at ioat? slave ?" 58.Sh DESCRIPTION 59The 60.Nm ioat 61driver provides support for BOCA Research IOAT66 62boards that multiplex together up to six 63.Tn EIA 64.Tn RS-232C 65.Pf ( Tn CCITT 66.Tn V.28 ) 67communications interfaces. 68.Pp 69Each 70.Nm 71device is the master device for up to six 72.Nm com 73devices. The kernel configuration specifies these 74.Nm com 75devices as slave devices of the 76.Nm 77device, as shown in the synopsis. The slave ID given for each 78.Nm com 79device determines which bit in the interrupt multiplexing register is 80tested to find interrupts for that device. 81The 82.Tn port 83specification for the 84.Nm 85device is used to compute the base addresses for the 86.Nm com 87subdevices. The port for the interrupt multiplexing register is not 88programmable. 89.Sh FILES 90.Bl -tag -width Pa 91.It Pa /dev/tty?? 92.El 93.Sh SEE ALSO 94.Xr com 4 95.Sh HISTORY 96The 97.Nm 98driver was adapted from the boca driver by Michael Richardson. 99