http://bugs.winehq.org/show_bug.cgi?id=10886
--- Comment #2 from Andrew O. Shadoura bugzilla@tut.by 2007-12-28 11:20:30 --- Created an attachment (id=9846) --> (http://bugs.winehq.org/attachment.cgi?id=9846) test app
We use some special applications those communicate via RS-485 network, RS-485 transceiver uses RTS to enable its transmitter. In general, the test program can look like the one attached.