Xref: utzoo comp.unix.msdos:370 comp.unix.xenix.sco:1854
Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!uunet!van-bc!twg!bill
From: bill@twg.bc.ca (Bill Irwin)
Newsgroups: comp.unix.msdos,comp.unix.xenix.sco
Subject: VP/ix defined COM1 causes immediate CORE DUMP.  Why?
Keywords: vpix com1
Message-ID: <1074@twg.bc.ca>
Date: 8 Mar 91 05:41:09 GMT
Reply-To: bill@twg.bc.ca (Bill Irwin)
Followup-To: comp.unix.msdos
Organization: The Westrheim Group, Vancouver, B.C., Canada
Lines: 26

[Followups to comp.unix.msdos]

I have just hit a MAJOR problem with VP/ix running on SCO XENIX
2.3.3.  I have an application that needs to use a modem, so I
mapped (in vpix.cnf) COM1 to /dev/ttya7.  The modem is connected
to a Texas Instruments CB811 8 port mux (which doesn't support
modem control 8^( ).

As soon as VP/ix is run with COM1 defined, the system crashes
with an entry in /etc/messages about an unrecoverable kernel page
fault.  This also happens when I define COM2.

The VP/ix manual says that you cannot have COM1 defined to a
Xenix device that is also a serial terminal.  So I thought of
disabling the modem port before invoking VP/ix.  No luck..it
still crashed.

I suspect that this may be a problem with the CB811 mux, which I
believe is a Computone that is OEMed by TI.  Has anyone had any
experience like this and solved it?  Thanks for any help you can
offer.
-- 
Bill Irwin    -       The Westrheim Group     -    Vancouver, BC, Canada
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