99 lines
2.7 KiB
Groff
99 lines
2.7 KiB
Groff
.\"
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.\" Copyright (c) 1994 Wilko Bulte
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.\" All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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.\" derived from this software withough specific prior written permission
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $Id: ahb.4,v 1.7 1997/03/07 02:49:43 jmg Exp $
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.\"
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.Dd January 19, 1996
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.Dt AHB 4 i386
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.Os FreeBSD
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.Sh NAME
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.Nm ahb
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.Nd Adaptec EISA SCSI host adapter driver
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.Sh SYNOPSIS
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.Cd controller ahb0
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.Cd controller scbus0 at ahb0
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.Sh DESCRIPTION
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This driver provides access to the
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.Tn SCSI
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bus connected to an Adaptec
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174x hostadapter in either
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.Dq Em standard
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or
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.Dq Em enhanced
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mode. If the controller
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is set to standard mode (using the
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.Tn EISA
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configuration utility),
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the driver will automatically
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switch the card to enhanced mode during the device probe.
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.Pp
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.Sy N.B. :
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When configuring a system
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with both
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.Xr aha 4
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and
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.Nm
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drivers, the
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.Nm
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driver should be listed first in the kernel configuration file. This
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ensures that the
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.Nm
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driver will find the Adaptec 174x boards before the
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.Xr aha 4
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driver probes for Adaptec 154x boards.
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.Pp
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Note that no I/O addresses are configured in the kernel config file. The
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174x uses
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.Tn EISA
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slot-specific I/O which is configured automatically.
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.\"
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.\" .Sh DIAGNOSTICS
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.\"
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.Sh SEE ALSO
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.Xr aha 4 ,
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.Xr ahc 4 ,
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.Xr cd 4 ,
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.Xr scsi 4 ,
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.Xr sd 4 ,
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.Xr st 4
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.Sh AUTHORS
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The
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.Nm
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driver was written by
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.An Julian Elischer
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for
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.Tn Mach
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2.5. It was converted to automatic
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.Tn EISA
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configuration by
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.An Justin Gibbs .
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.Sh HISTORY
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The
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.Nm
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driver first appeared in the
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.Tn 386BSD
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patchkit.
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