I created a SIMPL COM Port program for this reason. Loaded it up to a spare slot in my Test MC3 and use it to change Com port baud rates etc on the fly whilst capturing RS232 codes.
From memory select Options/Preferences/Program Editing and tick Special under? Symbol Set.
Add Speedkey: comspec.usp to Logic
Add Device Extender : Packet Transmission to you Com Port Slot
Add Device Extender :?Com port information to the Com port you are testing (though I think it still doesn't work currently (for feedback of settings changed)
Feed Serial output of comspec.usp to Packet Transmission.
