Connector - Macintosh RS-422

It's possible to connect RS-232 peripheral to the RS-422 portavailable on Macintosh computers. Use RXD- as RXD, TXD- as TXD,Ground RXD+, Leave TXD+ unconnected, GPi as CD.

8 PIN MINI-DIN FEMALE at the computer.

(at the computer)

Pin	Name	Direction	Description
1	HSKo	Output	Output Handshake
2	HSKi/CLK	Input	Input Handshake or External Clock
3	TXD-	Output	Transmit Data (-)
4	GND	---	Ground
5	RXD-	Input	Receive Data (-)
6	TXD+	Output	Transmit Data (+)
7	GPi	Input	General Purpose Input
8	RXD+	Input	Receive Data (+)

Note: Direction is DTE (Computer) relative DCE (Modem).

Note: GPi is connected to SCC Data Carrier Detect (or to Receive/Transmit Clock if the VIA1 SYNC signal is high). Not connected on the Macintosh Plus, Classic, Classic II, LC, LC II or IIsi.

Source: HW-Book 2001-06-08
Last modified: 2007-06-27 16:22:58.0
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