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+.\"	$OpenBSD: eso.4,v 1.1 1999/08/05 21:29:24 niklas Exp $
+.\"	$NetBSD: eso.4,v 1.2 1999/08/02 17:43:52 augustss Exp $
+.\"
+.\" Copyright (c) 1999 Klaus J. Klein
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. The name of the author may not be used to endorse or promote products
+.\"    derived from this software without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.Dd August 5, 1999
+.Dt ESO 4
+.Os
+.Sh NAME
+.Nm eso
+.Nd ESS Technology Solo-1 PCI AudioDrive device driver
+.Sh SYNOPSIS
+.Cd "eso*   at pci? dev ? function ?"
+.Cd "audio* at eso?"
+.\" .Cd "mpu*   at eso?"
+.Cd "opl*   at eso?"
+.Sh DESCRIPTION
+The
+.Nm
+device driver supports sound cards based on ESS Technology Solo-1
+PCI AudioDrive chips (ES1938 and ES1946),
+e.g. the TerraTec 128i PCI card.
+.Sh DIAGNOSTICS
+.Bl -diag
+.It "eso0: can't map Audio 1 DMA into I/O space"
+PCI autoconfiguration did not map the first audio channel DMA controller into
+I/O space at a suitable address, and the driver was not able map it by itself.
+In that case only playback functionality will be available.
+.It "eso0: reset timeout"
+The device failed to acknowledge being reset.
+.It "eso0: RDR timeout"
+The driver timed out reading data from a controller register.
+.It "eso0: WDR timeout"
+The driver timed out waiting to send a command or writing to a controller
+register.
+.El
+.Sh BUGS
+The game port and MIDI port are not supported.
+.Sh SEE ALSO
+.Xr audio 4 ,
+.\" .Xr mpu 4 ,
+.Xr opl 4 ,
+.Xr pci 4
+.Sh HISTORY
+The
+.Nm
+device driver appeared in
+.Nx 1.5 .