DB (D-Sub) Connectors and COM Ports A serial port on a PC is a male 9-pin connector (DE-9 D-sub). Early PCs had two 9-pin connectors or one 9-pin and one 25-pin (DB-25). On a PC, serial ports are ...

His latest project involves giving the ZEOS Pocket PC a fully-functional serial port. If you’re unfamiliar ... as well as delicate soldering to hook up the pins to the right signals on the ...