pinout (распиновка)

Serial (MSX) connector

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9 pin D-SUB FEMALE connector  at the computer

Pin Name Dir Description 1 PG - Protective Ground 2 TXD Transmit Data 3 RXD Receive Data 4 RTS Request to Send 5 CTS Clear to Send 6 DSR Data Set Ready 7 GND - Signal Ground 8 DCD Carrier Detect 9 DTR Data Terminal Ready

Note: Direction is DTE (Computer) relative DCE (Modem)

Источник: Mayer's SV738 X'press I/O map