rn@ap.co.umist.ac.uk (bob nutter) (03/06/91)
We're experiencing a problem with the serial lines on our dn3000's and 4000's: They're connected to our Gandalf PACX and should drop the line on logout, causing the PACX to disconnect. Sometimes however, you return to the login prompt again. Once this happens, it stays like that, and can only be cleared by pressing the reset switch (shut doesn't clear it). This causes messy behaviour when on a terminal, but interferes with Eudora (a Mac mailer that communicates via telnet over our serial lines). Has anyone else experienced this, or can offer a solution? (this is unpatched sr10.1, but the necessity of the reset switch leads me to think this is related to the driver chip) bob ------------------------------------------------------------------------------- bob nutter, computer officer | "If there's no class divide, then how come UMIST dept of computation | you're standing here waiting for a bus po box 88 manchester m60 1qd uk | when someone drives past in a car worth tel:+44 61 200 3386 | the price of a house?" email:b.nutter@umist.ac.uk | -Class War grafitti
goldfish@CONCOUR.CS.CONCORDIA.CA (03/07/91)
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 <goldfish@concour.cs.concordia.ca> (514) 848-3031 (Shirley Maclaine told me there would be LIFETIMES like this)