Add manual page for the ahd driver. Taken from FreeBSD and adapted
to the NetBSD port of the driver. OK'ed by fvdl.
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# $NetBSD: Makefile,v 1.341 2004/12/20 18:32:46 christos Exp $
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# $NetBSD: Makefile,v 1.342 2004/12/23 23:13:14 he Exp $
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# @(#)Makefile 8.1 (Berkeley) 6/18/93
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MAN= aac.4 acardide.4 aceride.4 acphy.4 adc.4 adv.4 \
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adw.4 agp.4 ahb.4 ahc.4 amdpm.4 amhphy.4 amr.4 \
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adw.4 agp.4 ahb.4 ahc.4 ahd.4 amdpm.4 amhphy.4 amr.4 \
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an.4 aria.4 artsata.4 ata.4 atalk.4 ath.4 atppc.4 atw.4 \
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auacer.4 audio.4 audiocs.4 auich.4 autri.4 auvia.4 awi.4 \
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bba.4 bce.4 be.4 bge.4 bha.4 bktr.4 bpf.4 bmtphy.4 \
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.\"
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.\" Copyright (c) 1995, 1996, 1997, 1998, 2000
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.\" Justin T. Gibbs. All rights reserved.
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.\" Copyright (c) 2002
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.\" Scott Long. 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 without 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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.\" $FreeBSD: /repoman/r/ncvs/src/share/man/man4/ahd.4,v 1.5 2004/07/04 14:17:41 simon Exp $
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.\"
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.Dd July 4, 2004
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.Dt AHD 4
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.Os
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.Sh NAME
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.Nm ahd
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.Nd Adaptec PCI/PCI-X Ultra320 SCSI host adapter driver
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.Sh SYNOPSIS
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For one or more PCI/PCI-X cards:
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.\".Bd -ragged -offset indent -compact
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.Cd "ahd* at pci? dev ? function ?"
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.Pp
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To compile in debugging code:
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.Bd -ragged -offset indent -compact
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.Cd options AHD_DEBUG
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.Cd options AHD_DEBUG_OPTS=<bitmask of options>
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.Cd options AHD_REG_PRETTY_PRINT
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.Ed
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.Pp
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.if 0 \{
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To configure one or more controllers to assume the target role:
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.Bd -ragged -offset indent -compact
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.Cd options AHD_TMODE_ENABLE=<bitmask of units>
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.Ed
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.Pp
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\}
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.ie 0 \{
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For one or more
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.Tn SCSI
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busses:
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.Bd -ragged -offset indent -compact
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.Cd device scbus
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.Ed
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\}
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\{For
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.Tn SCSI
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buses:
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.Cd scsibus* at ahd?\}
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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(es) connected to Adaptec
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.Tn AIC79xx
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host adapter chips.
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.Pp
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Driver features include support for narrow and wide busses,
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fast, ultra, ultra2, ultra160, and ultra320 synchronous transfers,
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packetized transfers, tagged queueing,
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.ie 0 \{ 512 SCB's, and target mode.
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\}
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\{and 512 SCBs.\}
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.Pp
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The
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.Dv AHD_DEBUG_OPTS
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option is used to control which diagnostic messages are printed to the
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console when
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.Dv AHD_DEBUG
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is enabled.
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Logically OR the following bits together:
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.Bl -column -offset indent Value Function
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.Em "Value Function"
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0x0001 Show miscellaneous information
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0x0002 Show sense data
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0x0004 Show Serial EEPROM contents
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0x0008 Show bus termination settings
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0x0010 Show host memory usage
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0x0020 Show SCSI protocol messages
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0x0040 Show mode pointer of the chip register window
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0x0080 Show selection timeouts
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0x0100 Show FIFO usage messages
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0x0200 Show Queue Full status
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0x0400 Show SCB queue status
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0x0800 Show inbound packet information
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0x1000 Show S/G list information
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0x2000 Enable extra diagnostic code in the firmware
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.El
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.Pp
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The
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.Dv AHD_REG_PRETTY_PRINT
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option compiles in support for human-readable bit definitions for each register
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that is printed by the debugging code.
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However, it also bloats the compiled
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size of the driver by approximately 215KB.
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.Pp
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.if 0 \{
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Individual controllers may be configured to operate in the target role
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through the
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.Dv AHD_TMODE_ENABLE
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configuration option.
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The value assigned to this option should be a bitmap
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of all units where target mode is desired.
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For example, a value of 0x25 would enable target mode on units 0, 2, and 5.
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Note that target mode is only supported for ultra160 speeds and below.
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.Pp
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Per target configuration performed in the
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.Tn SCSI-Select
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menu, accessible at boot,
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is honored by this driver.
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This includes synchronous/asynchronous transfers,
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maximum synchronous negotiation rate,
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wide transfers,
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disconnection,
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and the host adapter's
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.Tn SCSI
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ID.
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\}
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.Sh HARDWARE
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The
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.Nm
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driver supports the following:
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.Pp
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.Bl -bullet -compact
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.It
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Adaptec
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.Tn AIC7901
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host adapter chip
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.It
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Adaptec
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.Tn AIC7901A
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host adapter chip
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.It
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Adaptec
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.Tn AIC7902
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host adapter chip
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.It
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Adaptec
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.Tn 29320
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host adapter
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.It
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Adaptec
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.Tn 39320
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host adapter
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.It
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Many motherboards with on-board
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.Tn SCSI
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support
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.El
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.if 0 \{
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.Sh BUGS
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The current generation of 79xx chips do not support target mode in Ultra320
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mode.
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Target mode in general has not been well tested in this driver.
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\}
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.Sh SEE ALSO
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.Xr ahc 4 ,
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.Xr cd 4 ,
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.Xr ch 4 ,
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.\" .Xr da 4 ,
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.Xr intro 4 ,
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.\" .Xr sa 4 ,
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.Xr scsi 4
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.Xr sd 4 ,
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.Xr ses 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, the
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.Tn AIC7xxx
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sequencer-code assembler,
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and the firmware running on the aic79xx chips was written by
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.An Justin T. Gibbs .
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.Nx
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porting is done by Pascal Renauld, Frank van der Linden,
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Jason Thorpe, and Allen Briggs.
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This manual page is based on the
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.Xr ahc 4
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manual page.
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 4.7
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and
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.Nx 2.0 .
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