Date   : Wed, 02 May 1984 06:59:01-PDT (Wed)
From   : harpo!ulysses!burl!pmh@Ucb-Vax.ARPA
Subject: XEROX Info Request (820-1)

(The sound of bugs munching on your foundation)
-
I'm posting this article as a fervent plea for info regarding the
820 disk interfacing techniques required for 5 1/4" drives of the
DEC RX180AB persuasion. 
I personnaly don't own an 820, but none of the folks in my office
who do have a log-in.
They have managed to get the drives to work only by grounding the
motor-on line. Unfortunately, if the system is inadvertently reset
while the disks are loaded, the heads bounce down, deposit a little
garbage and then crash goes the system disk (write protected or
not). Needless to say, my colleagues are rather upset over these
trials and tribulations so if anyone out there in net land can help
out, please mail info to me and I'll pass it along to the concerned
parties.
Also, if anyone out there knows of a cheap source of XEROX CPM 2.2x,
please pass it along. 
One more thing..... These guys are relentless... Does anyone have a
schematic for a double density controller for the 820-1? How about
supporting PROM's and operating systems?
--
Thanks in advance..
                               Pete Hermsen
                               Bendix Field Engineering Corp.
                               PO Box 2304
                               Burlington, NC 27216

       ulysses!burl!pmh