1.\" $NetBSD: opl.4,v 1.17 2001/11/04 06:46:47 itohy Exp $ 2.\" 3.\" Copyright (c) 1999 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Lennart Augustsson. 8.\" 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 NetBSD 20.\" Foundation, Inc. and its contributors. 21.\" 4. Neither the name of The NetBSD Foundation nor the names of its 22.\" contributors may be used to endorse or promote products derived 23.\" from this software without specific prior written permission. 24.\" 25.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35.\" POSSIBILITY OF SUCH DAMAGE. 36.\" 37.Dd August 18, 1998 38.Dt OPL 4 39.Os 40.Sh NAME 41.Nm opl 42.Nd Yamaha OPL2 and OPL3 FM MIDI synthesizer driver 43.Sh SYNOPSIS 44.Cd "opl* at cmpci? flags 1" 45.Cd "opl* at esl?" 46.Cd "opl* at eso?" 47.Cd "opl* at ess?" 48.Cd "opl* at fms?" 49.Cd "opl0 at isa? port 0x388" 50.Cd "opl* at sb?" 51.Cd "opl* at sv?" 52.Cd "opl* at wss?" 53.Cd "opl* at yds?" 54.Cd "opl* at ym?" 55.Cd "midi* at opl?" 56.Sh DESCRIPTION 57The 58.Nm 59driver provides support for the Yamaha OPL2 (YM3812) and OPL3 60(YMF262) chips. The chips are FM synthesizers and are capable 61of producing a wide range of (mostly awful) sounds. 62.Pp 63Access to the device is through the MIDI driver. 64.Pp 65The 66.Nm 67driver usually attaches to a sound card, but it can also sit 68directly on the ISA bus. 69.Pp 70If 71.Dq flags 1 72is specified, the 73.Nm 74driver handles left and right channels of OPL3 swapped. 75Use this flag if your device has such problem. 76.Sh SEE ALSO 77.Xr cmpci 4 , 78.Xr esl 4 , 79.Xr eso 4 , 80.Xr ess 4 , 81.Xr fms 4 , 82.Xr isa 4 , 83.Xr midi 4 , 84.Xr sb 4 , 85.Xr sv 4 , 86.Xr wss 4 , 87.Xr yds 4 , 88.Xr ym 4 89.Sh HISTORY 90The 91.Nm 92device driver appeared in 93.Nx 1.4 . 94.Sh BUGS 95The OPL3 chip is operated in OPL2 mode despite being more capable. 96