ATARI 850 Interface Module

Description

This is a brand new vintage ATARI 850 Interface Module that is in its original shipping box.  All components are included, this includes: original user manual, power supply, and interface module.
The Atari 850 interface module was introduced in 1980.  It provided the Atari 400 and 800 computer systems with industry standard RS-232 serial ports and a
Centronics
compatible Parallel Printer port.
The 850 came with 4 RS-232 serial ports, however only Port #1 was widely used since it was the only port that had the full compliment of pin-outs for most modem use.  The other ports were more geared towards terminal use and Port #4 was capable of
TTY
terminal usage.
See photos for additional details.