1.\" $NetBSD: ess.4,v 1.15 2020/08/24 19:19:24 ryoon Exp $ 2.\" 3.\" Copyright (c) 1999 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 16.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 17.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 19.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25.\" POSSIBILITY OF SUCH DAMAGE. 26.\" 27.Dd August 25, 2020 28.Dt ESS 4 29.Os 30.Sh NAME 31.Nm ess 32.Nd ESS Technology AudioDrive family audio device driver 33.Sh SYNOPSIS 34.Cd "ess* at isapnp?" 35.Cd "ess* at pnpbios? index ?" 36.Cd "ess* at ofisa?" 37.Cd "audio* at audiobus?" 38.Cd "opl* at ess?" 39.Sh DESCRIPTION 40The 41.Nm 42driver provides support for the ESS 1788, 1888, 1887, and 888 AudioDrive 43audio devices. 44.Pp 45The AudioDrive 1788 is a half-duplex device, while the 1888, 1887, and 46888 are full-duplex. All are capable of 8- and 16-bit audio sample 47recording and playback at rates up to 44.1kHz. 48.Pp 49The AudioDrive takes 16 I/O ports. The I/O port range, IRQ, and DRQ 50channels are set by the driver to the values specified in the 51configuration file (or for isapnp, pnpbios, or ofisa, the values 52assigned from the firmware). 53The I/O port base must be one of 0x220, 0x230, 0x240, 540x250. The IRQ must be one of 5, 7, 9, 10 (or 15 on the 1887 55only). The first DRQ channel must be selected from 0, 1, 3. The second 56DRQ channel (used for playback by the full-duplex 1888/1887, ignored 57by the 1788) can additionally be set to 5. If both DRQ channels are 58used they must be different. 59.Pp 60The joystick interface (if enabled) is handled by the 61.Xr joy 4 62driver. 63.Sh SEE ALSO 64.Xr audio 4 , 65.Xr isapnp 4 , 66.Xr joy 4 , 67.Xr ofisa 4 , 68.Xr opl 4 , 69.Xr i386/pnpbios 4 70.Sh HISTORY 71The 72.Nm 73device driver appeared in 74.Nx 1.4 . 75.Sh BUGS 76The AudioDrive devices have a SoundBlaster compatibility mode, and may 77be detected by the SoundBlaster driver (see 78.Xr sb 4 ) 79rather than the AudioDrive driver. The workaround is to remove the 80SoundBlaster driver from the kernel configuration. 81