the PG685 printerport is a serial TTY (20mA) current loop. (for PT88 printers)
hyperterminal on PCs work with COM Port.
a COM Port can be
- a V24 (+/- 12 V)
- or a 20mA
baud rate on PG685 is set by soldering on SUB-D Pins.
you can plug in the pc a current loop card or you can use the PG-AG adapter (it is a V24 / TTY converter) need soldering work.
or you can convert the PG675 disc to PG685 file to PC file and then use a S5 PC program.
mybee, i have docs in my (hardware)folder "needless know how" from 1987 to 1993.