From owner-freebsd-hackers  Tue Jan 21 09:06:08 1997
Return-Path: <owner-hackers>
Received: (from root@localhost)
          by freefall.freebsd.org (8.8.4/8.8.4) id JAA00148
          for hackers-outgoing; Tue, 21 Jan 1997 09:06:08 -0800 (PST)
Received: from watermarkgroup.com (lor.watermarkgroup.com [38.246.139.30])
          by freefall.freebsd.org (8.8.4/8.8.4) with SMTP id JAA29954
          for <freebsd-hackers@freebsd.org>; Tue, 21 Jan 1997 09:04:44 -0800 (PST)
Received: from 38.246.139.33 (Kim.watermarkgroup.com) by watermarkgroup.com (4.1/SMI-4.1)
	id AA07819; Tue, 21 Jan 97 12:02:15 EST
Message-Id: <32E4F67C.343F@watermarkgroup.com>
Date: Tue, 21 Jan 1997 12:01:55 -0500
From: Luoqi Chen <luoqi@watermarkgroup.com>
Organization: The Watermark Group
X-Mailer: Mozilla 3.01Gold (Macintosh; I; PPC)
Mime-Version: 1.0
To: Terry Lambert <terry@lambert.org>
Cc: freebsd-hackers@freebsd.org
Subject: Re: My sportster internal modem doesn't work after switched to 2.2-BETA
References: <199701172052.NAA09015@phaeton.artisoft.com>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Sender: owner-hackers@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

Terry Lambert wrote:
> 
> > A few days after I switched to 2.2-BETA, my internal modem stopped
> > working. It can still dial and connect at 28800, and can read correctly,
> > but outputs garbage characters.
> 
> Probably you are using the wrong parity.  Check your parity settings on
> the port, which are set by your communications software (ie: they are
> not permanent settings).
>
After some poking around, I found that the if I sent multiple bytes
to the modem, some would get lost. So I went to sio.c and changed
com->tx_fifo_size to 1 from 16, and everything works fine now.
But I am still wondering if this is a problem with the modem, or with
the software. It seems that NT is doing the same, sending no more than
one
byte at a time. This is not a satisfactory solution, the output FIFO
is underutilized and CPU is servicing 16 times more interrupts.

>
>                                         Terry Lambert
>                                         terry@lambert.org
> ---
> Any opinions in this posting are my own and not those of my present
> or previous employers.

Thanks for your help.

-lq