Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!rutgers!mit-eddie!genrad!decvax!decwrl!labrea!cascade!leeke From: leeke@cascade.STANFORD.EDU (Steven D. Leeke) Newsgroups: comp.sys.mac,comp.sys.dec Subject: RS232 Help Needed Message-ID: <256@cascade.STANFORD.EDU> Date: Tue, 6-Jan-87 12:08:10 EST Article-I.D.: cascade.256 Posted: Tue Jan 6 12:08:10 1987 Date-Received: Tue, 6-Jan-87 23:27:59 EST Reply-To: leeke@cascade.UUCP (Steven D. Leeke) Distribution: na Organization: Stanford University Computer Systems Laboratory Lines: 44 Xref: mnetor comp.sys.mac:644 comp.sys.dec:36 After 2 marginally successful hours with a breakout box I would like to solicit help from the net. Here is what I am trying to do (and what has been happening so far): I want to hook the COM1 port of a PRO350 running Venix 1.0 up to a Macintosh Plus running MacTerminal in VT100 mode, as a second terminal. At the Mac Plus end is a Mac 512k peripheral adapter taking the MINI8 plug to a DB9 and the DB9 goes into an 8 conductor RJ11, of which only the inner 6 are used. At the PRO end is a DB25 from the 6 conductor RJ11. The pin connections are as follows: DB9 DB25 Signal === ==== ====== 1 7 Signal Ground 5 2 Transmit Data 6 20 Data Terminal Ready 9 3 Receive Data (Pins 4,5, and 6 on the DB25 also appear to be active. I tried various combinations of tying them together or to gnd or high with no changes.) I was expecting to have to flip 2 and 3 (null modem), but this was not the case. With the above configuration I could do: cat foo > /dev/com1 and the output would appear on the Mac, but editing /etc/ttys to make com1 an active terminal and then forcing init to restart with 'kill -2 1' as mentioned in the Installation and Maint. Manual failed to produce the 'login:' prompt on the Mac end. So, it appears that I can send data from the PRO to the Mac, but not the other way around. Does anyone have any helpful suggestions on how to solve the problem? Thanks for your help, Steve Leeke -- Steven D. Leeke, Center for Integrated Systems, Stanford University {ucbvax,decvax}!decwrl!glacier!leeke, leeke@cascade.stanford.edu "I suppose they don't use money in the 23rd century?"