[plt-scheme] serial port in windows

At Mon, 18 May 2009 23:32:40 +0530, Veer wrote:
> Thanks , i downloaded the new version , now it does not crashes anymore.
> Just one more question , if you know the answer :
> When i write to device eg using (write-bytes #"dt\r" out)  and try to read
> back from it (read-byte in) , most of the time nothing comes back.
> Is there special setting for output and input port for serial ports.

Does explicitly flushing the output port (with `flush-output') change
anything?