Path: news.weeg.uiowa.edu!news.uiowa.edu!hobbes.physics.uiowa.edu!math.ohio-state.edu!howland.reston.ans.net!europa.eng.gtefsd.com!news.umbc.edu!eff!news.duke.edu!news-feed-1.peachnet.edu!paperboy.wellfleet.com!noc.near.net!news.delphi.com!usenet From: John Bastin Newsgroups: comp.sys.apple2 Subject: Re: IIc serial port pin out Date: Tue, 10 May 94 00:03:39 -0500 Organization: Delphi (info@delphi.com email, 800-695-4005 voice) Lines: 33 Message-ID: References: <1994Apr25.114117.4516@apgea.army.mil> NNTP-Posting-Host: bos1a.delphi.com X-To: Smith S. Charles Smith S. Charles writes: >just make one to do the job. I have search the documentation I have >for the machine, and none of it seems to have a description of the >serial pins. > > If you know what these pins do, please send email. If there >is enough interest I will post a summary. The serial connector on the //c is as follows: Pin 1: RTS Pin 2: TXD Pin 3: Ground Pin 4: RXD Pin 5: DCD For connecting to a printer or a modem: FROM TO DIN-5 signal Modem (DCE) Printer (DTE) ----------------------------------------------- RTS (pin 1) DTR (pin 20) DSR (pin 6) RXD (pin 3) GND (pin 3) GND (pin 7) GND (pin 7) RXD (pin 4) RXD (pin 3) TXD (pin 2) DCD (pin 5) DSR (pin 6) DTR (pin 20) NOTE: Pin numbers given for DCE and DTE refer to pins on the DB-25 connector defined by the RS-232-C standard. J o h n B a s t i n Internet: jbastin@delphi.com WB8KKI FIDO: 1:2440/90 aq133@cleveland.freenet.edu