91 lines
2.7 KiB
Groff
91 lines
2.7 KiB
Groff
.\"Manual pages for FreeBSD Seagate ST01/02, Future Domain TMC-885,
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.\"TMC-950 SCSI driver.
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.\"
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.\"Copyright 1994, Serge Vakulenko (vak@cronyx.ru)
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.\"
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.\"Redistribution and use of this document, with or without
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.\"modification, are permitted provided redistributions must retain
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.\"the above copyright notice and this condition.
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.\"
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.\" $Id: sea.4,v 1.7 1998/06/08 06:11:59 jkoshy Exp $
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.Dd December 25, 1994
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.Dt SEA 4 i386
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.Os FreeBSD
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.Sh NAME
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.Nm sea
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.Nd
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Seagate ST01/ST02, Future Domain TMC-885, TMC-950 SCSI adapter driver
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.Sh SYNOPSIS
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With explicit memory and IRQ parameters:
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.Cd "controller sea0 at isa? bio irq 5 iomem 0xc8000"
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.Pp
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With automatic memory address detection and no IRQ:
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.Cd "controller sea0 at isa?
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.Pp
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.Cd "controller scbus0
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.Pp
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For each connected disk:
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.Cd "device sd0
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.Pp
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For each connected tape device:
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.Cd "device st0
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.Pp
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For one or more cdroms:
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.Cd "device cd0
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.Sh DESCRIPTION
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This driver provides access to SCSI devices connected to Seagate ST01/ST02 or
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Future Domain TMC-885, TMC-950 SCSI adapter.
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.Pp
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It's possible to use the Seagate ST01/ST02 adapter without IRQ line.
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The data rate then slightly decreases (by 20-30%).
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.Pp
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The \fBflags\fP keyword in the configuration file can be used to set
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some adapter driver parameters:
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.Pp
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Bits Description
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.br
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------------------------------------------
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.br
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0x01 Disable SCSI bus parity check.
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.Pp
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The original Seagate ST02
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BIOS cannot coexist with IDE or any other disk controller
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because it does not share BIOS disk drive numbers (80h, 81h)
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with others. The probing code of the driver allows using ST02 controller
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without BIOS: just unplug the ST02 BIOS chip from the board.
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.Pp
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Another problem is the floppy adapter on ST02 which could not be
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disabled by jumpers. The ST02 adapter it the best as a cheap solution
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for attaching the tape and CD-ROM drives, and an extra floppy controller
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is just a headache. There exist a simple workaround: cutting off
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the AEN signal (A11 contact on ISA connector). AEN then goes high and
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disables the floppy adapter port address decoder.
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.Pp
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Some motherboards also have a problem with ST02 conflicting with IDE during
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IDE data write phase. It seems than ST02 makes some noise
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on /IOW line. The /IOW line is used only for floppy controller
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part of ST02, and because it's rarely needed, cutting off the /IOW
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(contact B13) will help.
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.Pp
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Tested on the following hardware:
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.br
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Adapter: Seagate ST02
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.br
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Disk: HP D1686
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.br
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Streamers: Archive Viper 150, Wangtek 5525
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.br
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CD-ROMs: Toshiba XM-3401, NEC CDR-25
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.Pp
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Maximum data rate is about 270-280 kbytes/sec (on 386DX/40).
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.Sh FILES
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.Bl -tag -width Pa -compact
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.It Pa /sys/i386/isa/seagate.c
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driver source
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.El
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.Sh SEE ALSO
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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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