I've got a very simple application involving a PC transmitting (only) to a display over RS232. In theory only two wires are required Tx and Gnd as the display can "keep up" with whatever data rate the PC can produce. I'm using a test program that has the following handshake options "None, XON/XOFF, Hardware etc". I'm assuming that if I select "none" then the test program won't use handshaking but what about the UART itself?
Does the UART in a PC need hardware handshake lines pulled to a particular state in order to transmit?