Article 402 of comp.sys.apple2.programmer: Newsgroups: comp.sys.apple2.programmer Path: caen!uwm.edu!cs.utexas.edu!uunet!tarpit!bilver!vicstoy!aphelps 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 -- Austin Phelps - aphelps@vicstoy.oau.org -or- tf3@delphi.com UUCP - {peora,ge-dab,tous,tarpit}!bilver!vicstoy!aphelps - vicstoy Public Access Unix, Orlando FL - (407)299-3661 1200/2400/9600 V.32 24 hours 8N1 Pinout for the Apple IIc Serial port ____________________________________ 9 pin RS-232 25 pin RS-232 5 pin DIN connector (for Apple modem) (standard modems) (for Apple IIc) DTR 6 20 1 TD 9 2 2 GND 8 & 3 tied together 1 & 7 tied together 3 RD 5 3 4 DSR 2 6 5 To run AMIE, MCPINIT should remain as is except: Serial questions - Apple super serial card enter proper baud rate (bps) serial board is in slot 2 all lines are functional Screen questions - Apple IIe 80 column board