Epson GX-80 Operating Manual page 62

Switch 2-1 controls the printing of zeros. When it is up (ON), the
zeros are slashed (0); when it is down (OFF), they are not (0).
Switch 2-2 controls interpretation of the eighth bit (MSB). When the
switch is down (OFF), the eighth bit is ignored.
D-4
AppendixE
Using the Optional Tractor Unit
The optional tractor unit allows you to use continuous paper with
pin feed holes along the sides. The unit is adjustable so that the
continuous paper can be any width from 4 to 10 inches.
Printer Location
When you use the tractor and continuous paper, put your GX-80
where the paper can flow freely in and out of the printer. Use a
printer stand or any other arrangement that fits your working area.
Make sure, that the paper coming out of the printer does not inter-
fere with the paper going in and that the paper going in does not
catch on the printer cable. Because of the cable, it is usually best for
the paper that feeds into the printer to be stacked somewhat behind
the printer instead of directly beneath it. Two possible setups are
shown in Figures E-1 and E-2.
E-1
Figure E-1. Continuous paper with printer stand