73 
 
TEST GPIO 
Performs a functional test of the General Purpose Input Output interface, 
where: 
MONITOR GPIO 
INPUT 
Input logic values are displayed for Start Of Print, Feed, Pause, Reprint, 
and the six unassigned input lines. (Note that unconnected lines may 
display a zero or one value.) The values below are given as examples 
only: 
 
SOP FEED PAUSE REPRINT
1 1  0  0 
  
i1   i2  i3 i4 i5 i6
0 1 0 1 1 1
 
TEST GPIO 
OUTPUT 
Output logic values are displayed for  EP (End of Print),  RL (Ribbon 
Low), SR (Service Required), MO (Media Out), RO (Ribbon Out), DR 
(Data Ready), OF (Option Fault), and the six unassigned output lines. 
 Using the Navigation Buttons the cursor can be moved to select an 
output line and toggle its output state. (The values below are provided as 
examples only.)  
 
EP RL SR MO
RO
DR OF
0 1 0 0 0 1 0 
 
o1 o2 o3 o4 o5 o6 
0 0 0 0 0 0