Xylogics XY 753 with CDC XMD-II (9772) (sun-spots v9n70, v9n71)

[Guy Turcotte]

dan at breeze.bellcore.com (Daniel Strick) writes:

>I once asked a CDC customer service engineer about this.  He verified the
>suspicion: the older CDC 9772 disk drives do not support specification of
>the high order cylinder address bit during cylinder select (aka "tag-1")
>using the "tag-4" signal line.  The Xylogics 753 cannot address the last
>40 cylinders on these drives.

Somebody sent  me a message  2 weeks ago about the fact that Xylogics may
have a firmware revision of the 753 controller that address that problem.
(I think it's revision 2.2)

Guy Turcotte
turcotte at asterix.drev.dnd.ca