Centronics Data Computer Corporation (sometimes mis-spelled as centronix) was a printer manufacturer spun off from Wang Laboratories in the 1970's and is arguably the company we have to thank for the dot matrix impact printer. They eventually sold the printer business to GENICOM and that was eventually merged with Tally, an old competitor of Centronics to form Tally Genicom^
The Centronics interface, who's name we still use from time to time when refferring to a parallel printer cable or one of its connectors, was developed by Dr. Wang et all to take advantage of an overstock of Amphenol 36-pin ribbon cables originally intended for calculators. It was used on Wang computers and Centronics printers, and so competitors who wanted to replace either had an incentive to follow that standard. HP adopted it for thier printers including the first LaserJets and improved it for bi-directional communications on the LaserJet 4. Eventually, it was officially standardized by the IEEE 1284 standards board and the result is what we have today: The standard parallel port on the back of just about every printer.
Each addition to the original Centronics standard has been made in such a way as to allow the original equipment to continue working. The only major issue is that the original spec called for the busy signal to toggle once each line of printer text, and the current standard calls for it to toggle once for each character, allowing the printer to signal that it is ready for the next.
Do you have info on the Atari ST Centronics port? Apparently, it was almost, but not quite industry standard. This is causing me problems printing from an emulated ST running on a modern PC...+
|file: /Techref/io/parallel/centronics.htm, 2KB, , updated: 2009/3/11 09:54, local time: 2013/5/23 09:20,
|©2013 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?|
<A HREF="http://www.piclist.com/techref/io/parallel/centronics.htm"> Centronics</A>
|Did you find what you needed?|
PICList 2013 contributors:
o List host: MIT, Site host massmind.org, Top posters @20130523 RussellMc, IVP, Bob Blick, John Gardner, alan.b.pearce, veegee, Sean Breheny, Isaac Marino Bavaresco, Carl Denk, Josh Koffman,
* Page Editors: James Newton, David Cary, and YOU!
* Roman Black of Black Robotics donates from sales of Linistep stepper controller kits.
* Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters.
* Monthly Subscribers: None at this time. on-going support is MOST appreciated!
* Contributors: Richard Seriani, Sr.
Welcome to www.piclist.com!