On 11/09/2016 09:36 PM, Tony Duell wrote:
  On Thu, Nov 10, 2016 at 5:31 AM, Chuck Guzis
<cclist at sydex.com>
 wrote:
  Was a Dataproducts interface ever offered for the
MX-80? Back in
 the day, it was almost as popular as Centronics on mid-sized
 systems. 
 Was that the one that was fairly similar to Centronics but with some
 signals inverted? 
Yes--and IIRC, it used a 50-conductor connection as well.  We had some
big CDC OEM line printers in the mid 1980s that could be configured for
either interface.  Before that, in about 1975 we had a Diablo dot-matrix
printer (a strange, very loud beast) that used the DP interface.   (ISTR
that it also used three Rockwell PPS-8s).  Memory grows dim with each
passing year.
--Chuck