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Path: news.uiowa.edu!chi-news.cic.net!newsfeeder.sdsu.edu!newspump.sol.net!spool.mu.edu!usenet.eel.ufl.edu!tank.news.pipex.net!pipex!oleane!jussieu.fr!math.ohio-state.edu!usc!elroy.jpl.nasa.gov!decwrl!waikato!news.express.co.nz!actrix.gen.nz!atlantis.actrix.gen.nz!not-for-mail From: dempson@atlantis.actrix.gen.nz (David Empson) Newsgroups: comp.sys.apple2 Subject: Re: Apple SuperSerial Pinouts?? Date: 1 Jul 1996 22:35:01 +1200 Organization: Actrix - Internet Services Lines: 23 Message-ID: <4r89kl$66m@atlantis.atlantis.actrix.gen.nz> References: <4qrvpf$m9s@apollo.isisnet.com> NNTP-Posting-Host: atlantis.actrix.gen.nz In article <4qrvpf$m9s@apollo.isisnet.com>, Tony Cianfaglione <ab616@ccn.cs.dal.ca> wrote: > > I have a SuperSerial II card and need the pinouts so that I can get a > modem cable to hook up a standard Hayes-compatible modem (db25). Assuming you have the jumper block on the card pointing to "MODEM", just use a straight-through cable. The essential pins are 2, 3 and 7 (data lines and ground). You should also connect pin 20 (DTR). Pins 4 (RTS) and 5 (CTS) are required for hardware handshaking. The flow control lines can get a bit hairy, because of the special functions assigned by the 6551 chip. You should probably not connect anything to pin 8 at computer (DCD), because if this signal goes off, the computer will not be able to receive anything. You might like to connect modem pin 8 (DCD) to computer pin 6 (DSR) to give you a "connected" signal, provided your software supports this remapping. If you do this, then don't connect modem pin 6 to anything. -- David Empson dempson@actrix.gen.nz Snail mail: P.O. Box 27-103, Wellington, New Zealand