On 11/15/2016 12:59 PM, Eric Smith wrote:
  The same basic WD1000 or WD1001 controller design,
with
 customization, was used in the Fortune 32:16 and ACD HDC-1001.
 Probably others as well. 
It was used in a *lot* of machines back then.  Heck, I even used one on
my IBM 5150 with a Shugart SA-1001 drive.
--Chuck