My DOSUSB driver comes with support for USB-Serial adapters. However DOSUSB 
does not emulate an UART and therefore will not work with many DOS 
communications programs.

You will have to change the application program to either support the DOSUSB 
URB/API or use the included serdrv.sys device driver which allows to use DOS 
calls to communicate with the adapter.

Georg Potthast 

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