pcmhacking.net

More common chips from Prolific (for example, PL2303) do not support non-standard rates of exchange, but, fortunately, this problem driver on the computer, and not the chip, so that it can be circumvented. To do this, calculate the ratios, establishing the rate of exchange and make these data in the registry. We write in the registry branch [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Ser2pl]
"ExtBaudrate"="8192,2147485879"
Usually when working with diagnostic programs rather the next set of speeds:
"ExtBaudrate"="46,2147487743 200,2147487349 8192,2147485879 10400,2147485840 10472,2147485839"

this is very interesting i might have to try it with my prolific and see if i can get it to work.