Newsgroups: comp.sys.apple2.programmer
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From: aphelps@vicstoy.UUCP (Austin Phelps)
Subject: Re: Apple ][c serial port pinout needed
Message-ID: <1993Jul17.165610.2364@vicstoy.UUCP>
Organization: vicstoy public access Unix, Orlando, FL
References: <222li5$m9u@usenet.INS.CWRU.Edu>
Date: Sat, 17 Jul 1993 16:56:10 GMT
Lines: 36

In article <222li5$m9u@usenet.INS.CWRU.Edu> bt047@cleveland.Freenet.Edu (Eric P. Godfrey) writes:
>
>	I need the pin diagram of the Apple ][c serial port so
>I can make a modem cable that will work on it.
>	Thanks in advance, Forest

From IIc Reference Manual Vol I

  5.   .1
   4. .2
    1.

Port 2

1 - DTR2B - Data Terminal Ready output
2 - TD2B - Transmit Data Output
3 - GND - Ground
4 - RD2B - Read Data Input
5 - DSR2B - Data Set Ready Input

If you are building the cable for a normal 2400 modem, stright through
will work. for High speed here what the ProTerm manual says.

Computer  Modem
2 -> 2  TD
4 -> 3  RD
3 -> 7  GND
5 -> 6  DSR
1 -> 4  RTS
     Short 4 to 20 DTR

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