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Date: Mon, 4 Jun 2012 19:15:06 +0200 (CEST)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Hans Petter Selasky <hselasky@c2i.net>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: reverse USB driver - is it possible?
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>
> When USB was designed, they didn't think about what is called cross-over in
> the ethernet world. Therefore hardware is typically limited to host or device.
> Hardware that can do both is called OTG USB hardware.
>
OK fine, i now understand exactly what "OTG" means in eg. microchip 
microcontrollers. So this few $ things can do this, and expensive PC 
cannot.

So the only way to do this is to make a microcontroller based bridge or 
there are such solutions already available?

actually the only thing i want is CD/DVD USB simulator using file on my 
laptop or even separate flash memory (pendrive).