 This was implemented in a multi-pin connector that had enough pins to support the majority of the common RS-232 pins; the first models used a 9-pin D connector, but this was quickly replaced by a mini-DIN-8 connector.The ports could be put into either RS-232 or RS-422 mode, which changed the behavior of some of the pins while turning others on or off completely.These connectors were used both to support RS-232 devices like modems, as well as AppleTalk networking, RS-422 printers, and other peripherals.