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Date:      Wed, 06 Sep 1995 12:31:22 -0700
From:      David Greenman <davidg@Root.COM>
To:        "Daniel M. Eischen" <deischen@iworks.interworks.org>
Cc:        gryphon@healer.com, questions@freebsd.org
Subject:   Re: Known working ethernet cards 
Message-ID:  <199509061931.MAA26488@corbin.Root.COM>
In-Reply-To: Your message of "Wed, 06 Sep 95 14:00:36 CDT." <9509061900.AA07519@iworks.InterWorks.org> 

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>I have an SMC Ether-EZ (8416) installed on a FreeBSD machine that has
>been working flawlessly for a few months.  My only disappointment was
>having to use the DOS utility provided with the card to set the IRQ,
>IO memory address, etc. - our FreeBSD machine had no DOS/Windows on it
>and we had to take apart another machine in order to confgure the card.
>
>I had expected this card to have 16K of RAM, but it only has 8K.  I
>haven't performed any timing tests to see if this affects performance.

   Unfortunately, the multi-buffering technique that is used in the transmit
portion of the device driver is effectively disabled when the card has only
8k of RAM. This is necessary in order to provide maximum receive buffering.
This will likely reduce max transmit performance to around 600-700K/second.

-DG



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