[comp.sys.ibm.pc.hardware] How to get to the 3rd serial port from Windows 3.0?

owenc@hpindda.cup.hp.com (Owen Cheung) (11/09/90)

I am trying to install a 3rd serial port to my 386.  I can use the 3rd serial
port from Dos (as COM3:); however, I can't get to it from Windows 3.0.  I get
error message saying a DOS application has COM3: locked.  Even, I choose
to take the device away from the DOS application (from the requester), Windows
still come back with a message saying that COM3: is not available.  Any idea?