Date   : Mon, 04 Jun 1990 12:42:57 CST
From   : Steve Westlund <C08920SW@wuvmd.bitnet>
Subject: Daisy Chaining XEROX 820-2 Drives

Help!

I would like to daisy chain an 8-inch floppy drive unit to the 8-inch rigid
drive connected to my XEROX 820-2. I know where the floppy drive cable has
to be plugged into the back of the rigid drive unit.  However, my XEROX
manuals indicate that both the floppy drive and rigid drive units must be
internally modified in order for this to work.

Can anyone out there please explain to me what I have to do internally to
both disk drive units in order to daisy chain them?

As long as I am at it, there is one more question.  A XEROX 820-2 with two
floppy drives comes with a baby board which serves as the floppy disk
controller.  An 820-2 with a rigid drive unit has a different baby board
used to interface with the floppy and rigid disk controller located inside
the rigid drive assembly.  Can I modify a XEROX 820-2 to work with another
type of drive by simply swapping the baby boards, or is there more to it?

Thanks for any information you can provide,

Steve Westlund

Information Systems
Washington University
St. Louis, Missouri