Date   : Mon, 06 Sep 1982 18:14:46-PDT (Mon)
From   : (BAD ADDRESS)ucbvax (BAD ADDRESS)(BAD ADDRESS) (BAD ADDRESS) , 
Subject: Comments on MORROW DJ 2D/DMA?

I have been using the DJ2D, Rev. B for about a year and a half, along
with their disk drives.  The drives are nothing special, but if you
sanity (rather than dollars) is an issue, I would strongly
suggest getting the set of the controller and drives.  I have had very
little problems with the DJ itself.  The only thing that has bugged
me is the DMA addressed prom, located at E000.  I had to order another
prom up at F800 (there not easy to burn yourself).  The DJ uses up
2K at the top of memory, plus, if memory serves me correctly, another
2K in transient space as a buffer area.  I am really running a 58K
system instead of a 60K.  If this will cause any problem with you, I
would not suggest buying the board.  I did, at one time, attempt to 
use the bank select feature to cause the disk DMA and prom to be in
another bank, along with the buffer space.  It was a "forever" project
and I gave up.  As for the operation of the DJ, it is nice and fast,
relatively bug free, and as I stated previously, has given me very little
hassle in a year and a half of full time use (average of 7 hours daily).

If you have other specific questions, feel free to ask

David
Arpavax.DAG at UCB-C70

PS: if this comes to you with the headers screwed up, please
let me know...they should be fixed by now.