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Date: Wed, 23 Apr 1997 20:21:59 +0200
From: j@uriah.heep.sax.de (J Wunsch)
To: dmm125@bellatlantic.net (Donn Miller)
Cc: freebsd-bugs@freebsd.org, questions@freebsd.org
Subject: Re: com3 - sio2: "not found", but there
References: <1.5.4.16.19970423084052.2caf2e18@postoffice.bellatlantic.net>
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Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
In-Reply-To: <1.5.4.16.19970423084052.2caf2e18@postoffice.bellatlantic.net>; from Donn Miller on Apr 23, 1997 04:40:52 -0400
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As Donn Miller wrote:

>         I recently had this problem: while booting, and probing for
> sio2 on the isa bus, I get a "not found at 0x3e8", but I checked
> with MSD under DOS and this is the correct port address.  Also, it
> is set to probe at irq4, port 0x3e8, which is the setting I use
> under Windows, which works OK there.

This doesn't mean anything. :)

>         It is a Wang 14.4 Data Fax Modem (Hayes Compatible).

Many internal modems are known to have a poor UART emulation.  You can
try to spot the problem by turning on flags 0x80 in the sio2 driver
(using boot -c), this will report the failing probe routine.  Then,
look into /sys/i386/isa/sio.c, maybe you can tweak some DELAY() value
to give your UART emulation a little more time to react.

-- 
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. ;-)