Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!clyde!uunet!mcsun!hp4nl!eutrc3!rcstfdb
From: rcstfdb@eutrc3.urc.tue.nl (Frank WGM de Bruyn)
Newsgroups: comp.sys.mac
Subject: Mac modem cables recipe
Keywords: modem, do-it-yourself, save$$$
Message-ID: <1303@eutrc3.urc.tue.nl>
Date: 5 Dec 89 10:52:54 GMT
Organization: Eindhoven Univ. of Technology, the Netherlands
Lines: 40


I just did some work on modem cables for the Mac 512KE and Plus, thought
that a pinout recipe could be of use to you "netlanders". Here goes:

mini DIN-8 connector (male)	DB-25 connector (male)
Mac Plus			RS232 modem

1 (HSKo=handshake out)		20,4,8		
2 (HSKi=handshake in)				
3 (TxD-=Transmit Data)		2		
4 (Ground)			1,7
5 (RxD-=Receive Data)		3
6 (TxD+=Transmit Data)		
7 (Not connected)
8 (RxD+=Receive Data)		1,7

Warning: soldering the MacPlus mini DIN-8 connector requires a steady
hand and considerable patience because the pins are extremely close.



DB-9 connector (male)		DB-25 connector (male)
Mac 512KE			RS232 modem

1 (Ground)			1
2
3 (TxD-=Transmit Data)		7
4 (Ground)
5 (RxD-=Receive Data)		2
6 (TxD+=Transmit Data)		20,4,8
7 
8 (HSK=Handshake)		7
9 (RxD-=Receive Data)		3

Use 6 or more lead shielded cable (max. 60 ft.) to make the connections.
Most manufacturers indicate the pin numbers on the connectors.

Frank W. de Bruyn,
Eindhoven University of Technology,
Email: rcstfdb@urc.tue.nl