Information on part - test-drb@ccmp.vtda.org

9 Aug 1999

The WD2797 has little in common with the i8272.  It is essentially a WD1793
with a built-in PLL for clock recovery.  The instructions are, I think, the
same as those for the WD1793.

The clock recovery circuit works adequately for data rates suitable for
5.25" drives, but is less than wonderful for the 8" drives.  It was used
with great success on the 5.25" drive interfaces on Western Digital's line
of bridge controllers.  AFAIK, it was not as well received as the 9229 and
9216, both of which were digital clock recovery circuits suitable for use
with 8" drives.  These were popular enough, however, that someone on the
list probably has already scanned the data sheet.

Dick

-----Original Message-----
From: Dwight Elvey &lt;elvey(a)hal.com&gt;
To: Discussion re-collecting of classic computers
&lt;classiccmp(a)u.washington.edu&gt;
Date: Monday, August 09, 1999 6:59 PM
Subject: Information on part

...
 Hi
 I need information on a 2793. I know what it is, 'just need
to know how it is the same and how it differs from some
controller like a 8272.
 I looked at the obvious places on the net without results.
Dwight