Epson PC AX Technical Manual page 194

DIAGRAMS AHn REFERENCE MATERIALS HEV.A
*
Legend: I
o
O&H-Z
Input P in
Output Pin
Output
&
High-impedance Pin
no connection
high or open
low
]-20
In EQUITY
111+ /
EPSON pe AX the following
INPUT
JEFN JEO JROM JIMN JKN RA23 D40
EPR2
OUTPUT
RS3N RS2N MA9 ERON
signals are not used.