Path: news1.icaen!news.uiowa.edu!news1.chicago.cic.net!iagnet.net!207.22.81.9!europa.clark.net!128.230.129.106!news.maxwell.syr.edu!pumpkin.pangea.ca!news.mira.net.au!news2.mel.aone.net.au!news.mel.aone.net.au!newsfeed-in.aone.net.au!not-for-mail From: Andrew McDonald Newsgroups: comp.sys.apple2 Subject: Re: Null Modem Question Date: Wed, 27 Aug 1997 10:43:20 +1000 Organization: Customer of Access One Pty Ltd, Melbourne, Australia Lines: 81 Message-ID: <34037828.41C67EA6@aone.com.au> References: <340365F2.569A@fix.net> NNTP-Posting-Host: basil.mel.aone.com.au Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 2.02 (X11; I; FreeBSD 2.1.5-RELEASE i386) Cary Guy wrote: > > I'm trying to transfer files from my PC to my Apple //e and can't seem > to get it to work. I was wondering if possibly I'm using the wrong > cable. I'm using a standard PC serial cable to connect the two > machines. If this is the wrong thing to do, could some benevolent soul > be persuaded send me the pinouts for both ends of the cable so that I > can rewire it? > > thanks, > > -cary What you need there Cary is a null modem cable/ null modem adapter. A standard serial cable won't work. A null modem cable often LOOKS no different from a standard serial, however the receive data pin on one end is connected to the send data on the other end and vice versa. I copied this from http://www.teletechnics.com/cable_null.html (Didn't see the point of doing it myself considering how many times this has been already done on the net) 25 pin D to 25 pin D SIGNAL PIN No. PIN No. FG 1 ---------------- 1 1 to 1 TD 2 -------\/------- 2 2 to 3 RD 3 -------/\------- 3 3 to 2 RTS 4 -------\/------- 4 4 to 5 CTS 5 -------/\------- 5 5 to 4 DSR 6 --| |-- 6 6 & 8 to 20 SG 7 --+----------+-- 7 7 to 7 DCD 8 ------\/------ 8 see 6 DTR 20 -------/\------- 20 20 to 6 & 8 9 pin D to 9 pin D PIN No. PIN No. 2 ------\/------ 2 2 to 3 3 ------/\------ 3 3 to 2 4 -----\ /----- 4 4 to 6 5 -------------- 5 5 to 5 6 -----/ \----- 6 6 to 4 7 ------\/------ 7 7 to 8 8 ------/\------ 8 8 to 7 Case ---------- Case Also described as such: Connector 1 to Connector 2 DTR DSR/DCD DSR/DCD DTR RTS CTS CTS RTS TXD RXD RXD TXD GND GND 25 pin D to 25 pin D - alternative when 2 computers are both DTE SIGNAL PIN No. PIN No. FG 1 ---------------- 1 1 to 1 TD 2 -------\/------- 2 2 to 3 RD 3 -------/\------- 3 3 to 2 RTS 4 -----\ /----- 4 4 & 5 to 8 CTS 5 ------\ /------ 5 see 4 DSR 6 ------\\//------ 6 6 to 20 SG 7 ---------------- 7 7 to 7 DCD 8 ------//\\------ 8 8 to 4 & 5 DTR 20 ------/ \------ 20 20 to 6 -- Andrew McDonald andrewm@aone.com.au TECHNICAL SUPPORT Why do people who know the least ACCESS ONE know it the loudest?