yeah it's true there are limited which driver supports which is documented in the header ntddser.h file. The hardware support depends on the highest speed of the hardware (till 1990s the speed was 115.2 k, after 2000's it's become more than that like 230K, 430K etc.....). The baudrates that are supported by the drivers are derived from the devisors of the highest speed.(Ex:115.2k - devisor 1,57600-div2,38400-div 3 ..etc). So i'm looking for what can be done to achieve the baudrates (such as 76800) which are exact divisors of the highest speed(incase of 115.2k) also. Please let me know if you know any leads on the same. Thanks for your info sharing Adi

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