These are the pinouts for the optional 8-pin LocalTalk cable:These are the pinouts for a cable connecting the Macintosh printer or modem port to the printer’s serial port:Pin Name
1,2,7 Reserved
3 Transmit Data - (TXD)
4 Signal Ground (GND)
5 Receive Data - (RXD)
6 Transmit Data + (TXD)
8 Receive Data + (RXD)
To
Macintosh
DB-9 Female
To
Printer
DIN-8 Male
HandshakeOut 1 7 RTS
HandshakeIn 2 8 CTS
TXD- 3 3 TXD
RXD- 5 2 RXD
GND,RXD+ 4,8* 5 GND
6,7 Not Used
* Pins 4 and 8 must be connected together on the DIN-8.