Epson PX-8 Technical Manual page 16

Table 1-12 CN7 (RS-232C Interface) Pin Assignments
8~76
REV.-A
5 3
4
2 1
Pin No. Signal Name Definition
1 GND Signal ground
2 TXD Transmit data (output)
3
RXD Receiving data (input)
4
RST
Request-to-send (output)
5 CTS Clear-to-send (input)
6 DSR Data set ready (output)
7
DTR
Data terminal ready (output)
8 CD Carrier detect
E FG Chassis ground
1-12