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Date:      Wed, 6 Dec 1995 13:40:15 -0700 (MST)
From:      Barnacle Wes <>
To: (Justin M. Seger)
Subject:   Re: Zoom 28.8 V.FC Modem
Message-ID:  <>
In-Reply-To: <> from "Justin M. Seger" at Dec 3, 95 03:03:36 pm

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> I've got a Zoom 28.8 V.FC internal modem that I want to use with FreeBSD.
> I'm currently using a Zoom 14.4 internal without any trouble.  They are
> both configured for COM2 (sio1) and the default IRQ.  When I put the
> Zoom 28.8 in instead of the 14.4, it isn't identified at startup and I
> can't use it.  The Zoom 14.4 is identified without any trouble.  I called
> up Zoom and they sent me a chip upgrade, but that didn't make a difference.
> This modem works fine from DOS.  Does anyone have any ideas?

I have one of these also.  The Zoom V.FC uses a pretty bogus 16550 emulator
UART that the serial i/o probe in FreeBSD doesn't recognize by default.
I have a patch for the kernel sio.c source file for 2.0-R; I don't know
if these changes were incorporated into 2.0.5 or 2.1.  Basically, the
patch just adds a bunch of printfs to slow down the probe enough that
the bonehead UARTS have time to respond correctly.

E-mail me if you want the patches.

   Wes Peters	| Yes I am a pirate, two hundred years too late
    Softweyr 	| The cannons don't thunder, there's nothing to plunder
   Consulting	| I'm an over forty victim of fate...	|					Jimmy Buffet

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