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UART rx not working on STR9 simulater

I have the trial version of uvision, using the simulator for code examples from ST's str91x library. In the uart example the receive portion does not work. The data read from the DR is always what was last written to the DR during a transmit. I've played around with this a bit, skipping the ST lib functions, and see the same results. From what I've read I should be able to input to the UART from the serial window. This works fine with examples for other MCUs. Am I missing something here?