Farallon Communications 612 - Manual (Page 141)

Technical Specifications C-5
Macintosh DIN-8 pin assignments
The DB-25 male to 8-pin DIN male pin assignments for the
Macintosh serial cable are given below.
DIN-8
Pin #
Pin Name
DB-25
Pin #
1 Data Terminal Ready (DTR) 20, 4
2 Clear to Send (CTS) 5
3 Send Data (SD) 2
4, 8 Signal Ground (GND) 7
5 Receive Data (RD) 3
7 Data Carrier Detect (DCD) 8