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4
votes
3answers
1k views

What does opening a serial port do?

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 ...
3
votes
5answers
2k views

How can I add a DB9 serial port to a laptop?

I have a device I need a 9 pin serial port to configure. How can I add this capability to my laptop?
1
vote
2answers
234 views

USB TO DB9 Adapter

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 ...
1
vote
1answer
65 views

Can COM ports be used as RS232 serial ports?

Appologies if I am misusing/abusing specifications. Question: Is it possible to send serial signals via the PC's COM port? Is it further possible to split this port somehow and send signals to two ...