82559/82559ER to 82551ER/IT/QM Migration—Application Note 442

The document explains how to migrate from an Intel® 82559/82559ER Fast Ethernet controller based design to an Intel® 82551xx Fast Ethernet based-controller design. The primary differences to consider between the 82559/82559ER and 82551xx are 82551xx programmable device IDs, 82551QM integrated UNDI ROM, a second 82551xx General Control Register in the Control/Status Register (CSR) and Pinout differences.

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