Oki C9200 Service Manual page 13

(1) CPU
The CPU is 64-bit bus RISC processor PowerPC750, which receives an input of 80MHz
(=BUS CLK) and operates at 400MHz, four-times the input.
(2) Secondary Cache SRAM
SRAM is included as a secondary cache of the CPU on the board.
(3) ROM
The ROM is inserted into the three 168-pin DIMM slots. The slot A is for a program ROM
and the slot B is for the Japanese Kanji font. The slot C is not assigned.
(4) RAM
The RAM is inserted into the four 168-pin DIMM slots. The DIMMs must be fitted in
descending order of the type No. labeled on each of them into the slots 1, 3, 2 and 4.
SDRAM DIMM Specifications:
Speed:
Capacity:
Configuration: Without parity and ECC. Requires the SPD information. Number of
(5) EEPROM
The EEPROM (16Kb), an 8-pin DIP package, is inserted into the IC socket supplying the 3.3V
power. Settings for controlling the controller block are stored in the memory.
(6) Flash ROM
A 2-megabyte flash ROM is surface-mounted on the CRM board. The flash ROM, composed
of four chips of 256 kilo x 16 bits, can store fonts and macros.
(7) Memory Control LSI (CI)
A 696-pin BGA package ASIC made by NEC, which is equipped with a cooling heat sink and
mainly controls the CPU I/F, memory, video data compression and decompression, and PU-
video I/F.
(8) Interface Control LSI (C2)
A BGA package ASIC made by Toshiba, which controls the PU command I/F, operator panel
I/F, IDE I/F, Centronics I/F, USB I/F, PCI I/F, EEPROM and SPD (SDRAM DIMM) I/F.
(9) IDE HDD
An IDE connector is surface-mounted on the board to which an IDE HDD, assembled using
molds for the purpose, is connected. The IDE HDD is used for storing font data, spooling
edited video data temporarily and registering form data.
(10) PCI Bus Option
Two PCI I/F slots are provided for option board use. The bus, which uses an Oki Data original
connector, can accept an Ethernet board.
(11) Host Interface
Standard:
Additional Board: (connected to PCI BUS)
41388601TH Rev.2
PC100 or more
64/128/256MB
chips contained = 8 or 16.
Centronics two-way parallel I/F (IEEE-1284-compliant)
USB (USB1.1-compliant)
Ethernet Board
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