114 lines
4.4 KiB
Groff
114 lines
4.4 KiB
Groff
.\" $NetBSD: sb.4,v 1.22 2002/06/08 22:19:54 wiz Exp $
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.\"
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.\" Copyright (c) 1996 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by John T. Kohl.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the NetBSD
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.\" Foundation, Inc. and its contributors.
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.\" 4. Neither the name of The NetBSD Foundation nor the names of its
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.\" contributors may be used to endorse or promote products derived
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.\" from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd November 4, 1995
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.Dt SB 4
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.Os
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.Sh NAME
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.Nm sb
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.Nd SoundBlaster family (and compatible) audio device driver
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.Sh SYNOPSIS
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.Cd "sb0 at isa? port 0x220 irq 5 drq 1 drq2 5"
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.Cd "sb1 at isa? port 0x240 irq 7 drq 1 flags 1"
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.Cd "sb* at isapnp?"
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.Cd "sb* at pnpbios? index ?"
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.Cd "audio* at sb?"
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.Cd "midi* at sb?"
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.Cd "mpu* at sb?"
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.Cd "opl* at sb?"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for the SoundBlaster, SoundBlaster Pro,
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SoundBlaster 16, Jazz 16, SoundBlaster AWE 32, SoundBlaster AWE 64,
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and hardware register-level compatible audio cards.
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.Pp
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The SoundBlaster series are half-duplex cards, capable of 8- and 16-bit
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audio sample recording and playback at rates up to 44.1kHz (depending on
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the particular model).
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.Pp
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The base I/O port address is usually jumper-selected to either 0x220 or
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0x240 (newer cards may provide software configuration, but this driver
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does not directly support them--you must configure the card for its I/O
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addresses with other software). The SoundBlaster takes 16 I/O ports.
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For the SoundBlaster and SoundBlaster Pro, the IRQ and DRQ channels are
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jumper-selected. For the SoundBlaster 16, the IRQ and DRQ channels are
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set by this driver to the values specified in the config file. The IRQ
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must be selected from the set {5,7,9,10}.
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.Pp
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The configuration file must use 1
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.Cm flags
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specification to enable the Jazz16 support. This is to avoid potential
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conflicts with other devices when probing the Jazz 16 because it requires
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use of extra I/O ports not in the base port range.
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.Pp
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With a SoundBlaster 16 card the device is full duplex, but it can
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only sensibly handle a precision of 8 bits. It does so by extending
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the output 8 bit samples to 16 bits and using the 8 bit DMA channel
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for input and the 16 bit channel for output.
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.Pp
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The joystick interface (if enabled by a jumper) is handled by the
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.Xr joy 4
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driver, and the optional SCSI CD-ROM interface is handled by the
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.Xr aic 4
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driver.
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.Pp
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SoundBlaster 16 cards have MPU401 emulation and can use the mpu
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attachment, older cards have a different way to generate MIDI and
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has a midi device attached directly to the
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.Nm "" .
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.Sh SEE ALSO
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.Xr aic 4 ,
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.Xr audio 4 ,
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.Xr isa 4 ,
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.Xr isapnp 4 ,
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.Xr joy 4 ,
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.Xr midi 4 ,
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.Xr mpu 4 ,
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.Xr opl 4 ,
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.Xr pnpbios 4
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.Sh HISTORY
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The
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.Nm
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device driver appeared in
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.Nx 1.0 .
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.Sh BUGS
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Non-SCSI CD-ROM interfaces are not supported.
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.Pp
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The MIDI interface on the SB hardware is braindead, and the driver
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needs to busy wait while writing MIDI data. This will consume
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a lot of system time.
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