Oki OKIPAGE 10ex Maintenance Manual page 204

A2 to A23
D0 to D31
CAS0 to
CAS3
RAS2 to
RAS4
ORE, RD,
WR
CS3, EEPCS, EEPCLK
EEPDAT
IOS1
TXD, RST, DTR
Figure 3-3 RS-232C Serial Interface Board Block Diagram (Option)
40990901TH Rev.1
PD2, 3
BSY
RAS3, 4 RD
WR WR
RXD
RS-232C
CONNECTOR
7 /