On Tue, 29 Oct 2002, Josh Koffman wrote:

*>http://www.edtp.com/
*>They make a small Ethernet module based on the RTL8019. Code is all in
*>C, so of little use to me, but having another schematic is useful. If
*>you look at it though, it doesn't have any of the transformers and the
*>like you see on regular Ethernet cards. Any thoughts on this? I'm fresh
*>out of ideas.

Usually you can do ethernet w/o transformers if it does not need to drive
a lot of cards and if the circuit is already floating (because it has a
IP2 class mains transformer or such). It can also do this if it is not
floating, by relying on the other side's transformers. If both sides
decide to rely on the other side's transformers bad things will happen.

Peter

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