Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!stanford.edu!agate!ucbvax!CONCOUR.CS.CONCORDIA.CA!goldfish From: goldfish@CONCOUR.CS.CONCORDIA.CA Newsgroups: comp.sys.apollo Subject: Re: Problem with serial lines on dn3/4k? Message-ID: <9103071056.aa01287@concour.cs.concordia.ca> Date: 7 Mar 91 15:56:13 GMT References: <1991Mar6.103716@ap.co.umist.ac.uk> Sender: daemon@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 18 We have a Gandalf PAC-X which had been refusing to talk to our Apollos for two years. The problem comes from the fact that the Apollo does not handshake properly. I had a crontab driven program which monitored the status of the serial ports (with tctl) and reset the ports by "manually" tinkering with the DTR-DCD signals. Unfortunately this program was broken when we downgraded to the 10.2 OS. You should probably be able to figure out the program from what I have already said, however the cautionary note is that the "sio" and the "tty" devices are ignorant of one another and state changes to a tty can crash a sio application and vice versa. My suggestion is to look at another way to connect your serial lines to the Apollos through a platform that actually DOES support serial IO. -- Paul Goldsmith (514) 848-3031 (Shirley Maclaine told me there would be LIFETIMES like this)