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-.\"
-.\" Copyright (c) 1994 Jordan Hubbard
-.\" 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 withough 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.
-.\"
-.\" $FreeBSD$
-.\"
-.Dd October 16, 1998
-.Dt BT 4 i386
-.Os FreeBSD
-.Sh NAME
-.Nm bt
-.Nd Buslogic/Mylex MultiMaster SCSI host adapter driver
-.Sh SYNOPSIS
-.Cd "device bt0 at isa? port ? irq ?"
-.Cd device scbus0 at bt0
-.Sh DESCRIPTION
-This driver provides access to the
-.Tn SCSI
-bus connected to a Buslogic/Mylex MultiMaster or compatible controller:
-.Pp
-.Bd -filled -offset indent
-.Bl -column "BT-956CD " "ISA " "Commands " Description
-MultiMaster "W" Series Host Adapters:
-.Pp
-.Em "Adapter   Bus   Commands  Description"
-BT-948    PCI     192     ULtra SCSI-3
-BT-958    PCI     192     Wide ULtra SCSI-3
-BT-958D   PCI     192     Wide Differential ULtra SCSI-3
-.El
-.Bl -column "BT-956CD " "ISA " "Commands " Description
-MultiMaster "C" Series Host Adapters:
-.Pp
-.Em "Adapter   Bus   Commands  Description"
-BT-946C   PCI     100     Fast SCSI-2
-BT-956C   PCI     100     Wide Fast SCSI-2
-BT-956CD  PCI     100     Wide Differential Fast SCSI-2
-BT-445C   VLB     100     Fast SCSI-2
-BT-747C   EISA    100     Fast SCSI-2
-BT-757C   EISA    100     Wide Fast SCSI-2
-BT-757CD  EISA    100     Wide Differential Fast SCSI-2
-BT-545C   ISA      50     Fast SCSI-2
-BT-540CF  ISA      50     Fast SCSI-2
-.El
-.Bl -column "BT-956CD " "ISA " "Commands " Description
-MultiMaster "S" Series Host Adapters:
-.Pp
-.Em "Adapter   Bus   Commands  Description"
-BT-445S   VLB      30     Fast SCSI-2
-BT-747S   EISA     30     Fast SCSI-2
-BT-747D   EISA     30     Differential Fast SCSI-2
-BT-757S   EISA     30     Wide Fast SCSI-2
-BT-757D   EISA     30     Wide Differential Fast SCSI-2
-BT-545S   ISA      30     Fast SCSI-2
-BT-542D   ISA      30     Differential Fast SCSI-2
-BT-742A   EISA     30     SCSI-2 (742A revision H)
-BT-542B   ISA      30     SCSI-2 (542B revision H)
-.El
-.Bl -column "BT-956CD " "ISA " "Commands " Description
-MultiMaster "A" Series Host Adapters:
-.Pp
-.Em "Adapter   Bus   Commands  Description"
-BT-742A   EISA     30     SCSI-2 (742A revisions A - G)
-BT-542B   ISA      30     SCSI-2 (542B revisions A - G)
-.El
-.Ed
-.Pp
-AMI FastDisk Host Adapters that are true BusLogic MultiMaster clones are also
-supported by this driver.
-.Pp
-Tagged queueing is supported on 'W' series adapters, 'C' series adapters
-with firmware of rev 4.42 and higher, and 'S' series adapters with firmware
-of rev 3.35 and higher.
-.Pp
-Boards with certain firmware revisions may lock up under heavy load to
-certain devices, especially if tagged queueing is used.  Should you encounter
-a problem with your adapter, contact Mylex technical support and ensure you
-have the latest firmware for your controller.
-.Sh SEE ALSO
-.Xr cd 4 ,
-.Xr da 4 ,
-.Xr sa 4 ,
-.Xr scsi 4
-.Sh AUTHORS
-.An Julian Elischer
-wrote a driver for the Multimaster cards that appeared in the 386BSD
-patch kit.  The driver was rewritten by
-.An Justin T. Gibbs
-to take advantage of new board features and work with the CAM SCSI framework in
-.Fx 3.0 .
-.Pp
-Special thanks to 
-.An Leonard N. Zubkoff
-for writing such a complete and well documented Mylex/BusLogic MultiMaster
-driver for Linux.  Support in this driver for the wide range of MultiMaster
-controllers and firmware revisions, with their otherwise undocumented quirks,
-would not have been possible without his efforts.  
-.Sh FILES
-.Bl -tag -width /usr/share/man0/template.doc -compact
-.It Pa sys/dev/buslogic/bt.c
-Core Driver Implementation
-.It Pa sys/dev/buslogic/btreg.h
-MultiMaster Register Set and Core Driver Data Structures
-.It Pa sys/pci/bt_pci.c
-PCI Bus Driver Attachment
-.It Pa sys/i386/eisa/bt_eisa.c
-EISA Bus Driver Attachment
-.It Pa sys/i386/isa/bt_isa.c
-ISA/VL Bus Driver Attachment
-.El
-.Sh HISTORY
-The
-.Nm
-driver first appeared in the 386BSD patch kit.