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Date:      Tue, 24 Jun 1997 22:22:52 +0200
From:      j@uriah.heep.sax.de (J Wunsch)
To:        hackers@FreeBSD.ORG
Subject:   Re: Serial console problems on 2.2.2
Message-ID:  <19970624222252.DH60724@uriah.heep.sax.de>
In-Reply-To: <9706241408.ZM3665@phantasm.scl.ameslab.gov>; from Chris Csanady on Jun 24, 1997 14:08:10 -0500
References:  <9706241408.ZM3665@phantasm.scl.ameslab.gov>

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As Chris Csanady wrote:

> I recompiled the boot blocks with BOOT_FORCE_COMCONSOLE, but things
> only sortof work.

(Btw., watch out.  Bruce recently broke^H^H^H^H^Hkilled this option
in -current.)

> Probing for devices on the ISA bus:
> sc0 at 0x60-0x6f irq 1 on motherboard
> sc0: VGA color <16 virtual consoles, flags=0x0cu: Got hangup signal
> 
> Disconnected.

Sure.  The device probing lowers DTR, thus hangs up the line.  You
need to make your local end independent of the DCD-faked-by-remote-
DTR (e.g. by faking the DCD in a local loopback wiring, or making the
port `clocal' if it's unix).

If remote is a modem, you need to make the modem ignore DTR.

-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)



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