Serial (MSX) connector

#Computer#Serial Interfaces#Obsolete Computers
9 pin D-SUB FEMALE connector pin-out & layout

9 pin D-SUB FEMALE connector  at the computer

1PG-Protective Ground
2TXD-->Transmit Data
3RXD<--Receive Data
4RTS-->Request to Send
5CTS<--Clear to Send
6DSR<--Data Set Ready
7GND-Signal Ground
8DCD<--Carrier Detect
9DTR-->Data Terminal Ready
Note: Direction is DTE (Computer) relative DCE (Modem)

Serial (DB9) connector

Serial (Printer) connector