🚀 go-pugleaf

I received my PCDitto II about 2 weeks ago.  I installed it into my 1meg 520ST
and it didn't work.  It hung right after the point where it asks for a DOS
disk.  By scanning GEnie messages, I found that my problem was not all that
unique.  The problem seems to be timing differences in the MMU chip in the ST.
There is a fix for the problem to change out two PAL chips (in sockets).  I
have included a copy of the message from Avante-Garde Systems retrieved from
GEnie.

Now if we only had the 2-way GEnie hookup active, it could have been here a lot
sooner.  :-)  (I just had to do that, Dave(GBS))

   ---  following message retrieved from GEnie ---

Category 19,  Topic 2
Message 73        Mon Feb 12, 1990
AVANTGARDE                   at 16:54 EST
 
Dear pc-ditto II owners,
 
We are happy to announce we have found the problem with pc-ditto II hardware
not working with some STs.  We were correct about the changes in timings of
some machines being the heart of the problem and our correction widens the
tolerance for machines with different timings.  We can discuss our findings at
a later time in detail, if there are any engineers interested.  For now,
however, the following describes what to do to receive an update:
 
  1.  Correction involves replacement of two socketed chips on your pc-ditto 
      II board.  The chips are labeled:  U27  GLUPAL (part TIBPAL 20L8-25CNT)
      and  U15  EMSPAL  (part TIBPAL 16R4-25CN).  
  2.  Please carefully remove these chips (a flat-edge screwdriver under
      the end of each chip works best).  CAUTION:  Please observe static
      discharge procedures (as noted in the pc-ditto II Installation Manual)
      to prevent damage to your board.
  3.  Then, wrap the two chips in a soft packing material and return to
      Avant-Garde Systems at the following address:
        Avant-Garde System
        381 Pablo Point Drive
        Jacksonville,  Florida   32225
      (You may call (904) 221-2904 9am to 5pm Mon-Fri if you have questions.)
  4.  Please include your name and return address.
  5.  We will return two new replacement chips immediately along with 
      instructions on replacing them.
 
For owners with pc-ditto II that are already working, replacement of these two
chips will not help you.  Therefore, we would not recommend "fixing your
product if its not broken".
 
We are now working on a blitter fix and standardized Mega expansion port
fixture and will post a message soon about those items.
 
(Also, if you have already called or written, you will be receiving a letter
concerning the above, as well).
 
Thanks!

------------------------------------------------------------------------
Jet Propulsion Laboratory, 4800 Oak Grove Dr., Pasadena, CA  91109 

"It better work 'cause after launch, service calls are quite expensive.
  It's only $40 for the call but it's the mileage that kills you." 

Walt Hoffman, Real-time Analyst, Galileo Orbiter Engineering Team
------------------------------------------------------------------------ 
-- 
- if it GLISTENS, gobble it!!