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1995-03-09
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-------------------------------------------------------------------------
SCSI Preferences for the Amiga 3000
-------------------------------------------------------------------------
by Martin A. Blatter (blatter@ifi.unizh.ch)
This small program allows you to change the bits in the Amiga 3000's
battery backed up memory that control some parameters of the embedded
SCSI host adaptor.
IT REQUIRES AMIGADOS 2.0 OR HIGHER AND AN A3000! It won't run on an
A2000!
SCSI Prefs is Freely Distributable Software. The entire risk as to the
quality and performance of this programs is with you.
Put SCSI Prefs in your prefs directory. It offers the same look and
feel as the standard 2.0 Preferences editors, so you'll imediately
find yourself familiar with its user interface.
--------------------------------------- Long SCSI Timeout (Seacrate Mode)
This checkbox determines how long the host adaptor waits for connected
drives. It's especially useful for owners of drives that take a long
time to spin up. Drives manufactured by Seagate are candidates for this
setting. With this option enabled the controller will wait 2 seconds
instead of 128 ms.
(Some drives by Imprimis and Maxtor also need long timeouts)
---------------------------------------------------- Synchronous Transfer
When this option is enabled, the host adaptor will initiate synchronous
transfers (hence the name of this option :-) with hard drivers capable
of doing them.
(Hard drives made by Imprimis, Conner Peripherals and Quantum Fujitsu
usually support synchronous transfers)
--------------------------------------------------- Support Multiple LUNs
Each SCSI ID can support several Logical Unit Numbers. I can't think of
a use for more than one LUN right now, but that situation can change...
Leave this option disabled for now, beacause it apparently can cause
troubles with hard drives that respond on more than one LUN address.
---------------------------------------------------- Host Adaptor SCSI ID
The Amiga (resp. its SCSI controller) is usually set to SCSI address 7.
If you want to use a SCSI device with your Amiga that can't be jumpered to
another address than 7 , you'll have to type in another number here. Be
sure not to use a SCSI ID that is already assigned to device attached
to your Amiga. (The internal Quantum hard drive is set to SCSI ID 6).
The value of SCSI ID's can range from 0 to 7.
Take care! If you experiment with SCSI ID's, always keep a copy of this
program on a disk. Your hard drive won't boot if both, the Amiga and your
hard drive have the same SCSI ID...
-------------------------------------------------------------------- Note
All changes made with SCSI Preferences won't have an effect until you
reset your Amiga.
-------------------------------------------------------------------------
Please send suggestions, comments and bug reports to:
Martin A. Blatter, Relog AG
Internet: blatter@amiga.physik.unizh.ch, blatter@ifi.unizh.ch or
cbmehq!cbmswi!zethos!blatter@cbmvax.commodore.com
Snail Mail: Pfaffaecherstr. 59, CH-8913 Ottenbach/ZH, Switzerland