![]() Dataproducts parallel was available in a short-line for connections up to 50 feet (15 m) and a long-line version for connections from 50 feet (15 m) to 500 feet (150 m). It used a DC-37 connector on the host side and a 50 pin connector on the printer side-either a DD-50 (sometimes incorrectly referred to as a "DB50") or the block shaped M-50 connector the M-50 was also referred to as Winchester. For example, early VAX systems used a DC-37 connector, NCR used the 36-pin micro ribbon connector, Texas Instruments used a 25-pin card edge connector and Data General used a 50-pin micro ribbon connector.ĭataproducts introduced a very different implementation of the parallel interface for their printers. The Centronics parallel interface quickly became a de facto industry standard manufacturers of the time tended to use various connectors on the system side, so a variety of cables were required. The now-familiar connector was selected because Wang had a surplus stock of 20,000 Amphenol 36-pin micro ribbon connectors that were originally used for one of their early calculators. An Wang, Robert Howard and Prentice Robinson at Wang Laboratories. ![]() The Centronics Model 101 printer was introduced in 1970 and included the first parallel interface for printers. The IEEE 1284 standard defines the bi-directional version of the port. It is also known as a printer port or Centronics port. ![]() A parallel port is a type of interface found on computers (personal and otherwise) for connecting various peripherals. ![]()
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