Mark Wendt wrote:
> On 02/28/2011 08:56 AM, Moses McKnight wrote:
>    
>>> [snip]
>> Sounds like standard ethernet frames.  I would imagine they would use
>> standard frames because ethernet hardware is expecting that.
>>
>> http://en.wikipedia.org/wiki/Ethernet_frame
>>
>> Moses
>>      
> Almost, except that standard Ethernet frames are typically of
> non-variable length, adjustable only by changing the MTU, and are
> "padded" to maintain the frame length being used.  The Sercos3 seemingly
> allows variable length frames.
>    
This isn't how it works.

There is a minimum frame size (512 bits), and a maximum transfer unit 
(usually 1500 bytes or so, sometimes up to 9000 bytes on a gigabit line 
with "jumbo frame" support).  As long as they're between those limits, 
the packets can be any size.


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