This is based on the Sil3112 chip. If it was flashed would all four ports work?
http://www.ebay.com/itm/Silicon-Ima...009?pt=LH_DefaultDomain_0&hash=item2c7740cb09
http://www.ebay.com/itm/Silicon-Ima...009?pt=LH_DefaultDomain_0&hash=item2c7740cb09