Date   : Fri, 16 Jan 2004 13:46:46 +0100
From   : "Mark Usher" <mu.list@...>
Subject: ADFS Winchester support

Looking at the ADFS a little further, my very limited assembler
capabilities lead me to believe that ADFS (1.50), is hard coded to
access Device 0, and uses LUN 0 & 1 to differentiate between the two
drives on an adaptec acb 4000/4070. This buggers things up somewhat when
you want to have two SCSI devices directly on a host controller, unless
you have the rare ability to set LUN on the drive.

I think also that parity has to be disabled for the host adapter - which
on many later drives is impossible to set.

I've just been tinkering the last few days, and I have attached a Maxtor
1.2GB SCSI-1 drive and am able to send commands and receive the
answering data. Just time to sort out a program that will format many
drives easily. I've already got the workings of something I did a while
ago...

Still no success attaching two host adapters at the same time :-(
I did notice that with the modification 
IC7 (74LS138N) PIN 5 to IC6 (74LS138N) PIN 13 the status register is
?&FC45=BC 
and with
IC7 PIN 5 to nothing ! The result is the same, BC in the status
register.

-Mark