Oki PACEMARK 4410 Maintenance Manual page 16

(4) CG ROM (IC48)
This is a 256K x 16 bits (4M bits) EPROM with the font data for the characters stored.
CG ROM is assigned to the program memory area of the MPU and is fetched by the RD signal
of the MPU.
The following shows the memory access operation.
MPU
MPU CLOCK
ALE
A16~BHE
AD0~AD15
RD
CS
40496501TH Rev.1
A16~BHE
AD0~AD15
ALE
RD
WR
CS
CLK
A16-BHE
A0–A15
Figure 2.4
Main LSI
A1~A16
NHDC LSI
BANK0
BANKS
CS
D0–D15
CG ROM
A17
A16
A0~A15
OE
CE
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