What does opening the standard PC serial port do, in electrical terms (i.e. what voltages on which pins)? For example, the ancient VB6 program which controls an apparatus I am tasked with maintaining ...
I have a USB-to-DB9 adapter, no FCC serial visible anywhere, that I need drivers for. I can't seem to get any relevant info searching on Google. Does anyone have any good ideas where I might be able ...
I have a device I need a 9 pin serial port to configure. How can I add this capability to my laptop?