How do I turn on and off individual bits on the serial port?

[OrbitBill]

I know how to do this using inport.vi and outport.vi for the parallel port. How does one turn on and off individual bits on the serial port?

Any help would be greatly appreciated.

Thanks,

Bill Fedak

[Dennis_Knutson]

I'm going to assume you're talking about the serial port control lines since a serial port only has a single line for data. If you're using the old serial functions, look in vi.lib\platform\_sersup.llb for serial line ctrl.vi. If you're using VISA, create a VISA Property Node and select Modem Line Settings.