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Date:      Tue, 31 Mar 1998 12:25:05 -0500 (EST)
From:      "Ron G. Minnich" <rminnich@Sarnoff.COM>
To:        freebsd-hackers@FreeBSD.ORG
Subject:   Re: Virtual Interface Architecture
Message-ID:  <Pine.SUN.3.91.980331122235.9500C-100000@terra>
In-Reply-To: <19980331185545.KC05138@mars.hsc.fr>

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The interesting thing is: you're going to need a scope or logic analyzer. 
Here's how you can do it though. 

you need an mmap'able device. Map the device in. Have your program write 
to the device memory and then call the send() system call. 

You also need the scope on your ethernet. Watch for the bits to appear. 
Measure time difference. 

It's a bit difficult to set up, but worth it.

ron

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