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