@wyatt Do I have this straight?
- DE-9 is the common connector for PC serial ports since the PC-AT, specified in TIA-574
- DB-9 is the connector on older RS-232 serial cards: a DB-25 subset with only the 9 pins commonly used by a serial port

#serial #SerialPort #DSub #DSubminiature #LegacyPorts #DB9 #DE9 #DB25 #RS232