Sharp JX-8200 Service Manual page 161

SHARP SERVICE MANUAL JX8200SM [13] ELECTRICAL SECTION
ROM BLOCK
FCT162245
AD bus
Address bus
A21-2
FCT162373
DRAM BLOCK
FCT162827
DRAM address
DRAM module
FCT162827
Engine I/F BLOCK
MAX232
AM85C30
IO DATA bus
Control signal
CMD/STS signal
LS244
Bi-Parallel I/F BLOCK
IO DATA bus
Control signal IDT79R3741
FCT52
LS 244
DATA bus
D31-0
16Mbit
ROM x 2
DRAM
8MByte
DATA bus
D31-0
16MByte x 2
Debug connector
Engine I/F
connector
Video I/F signal
LS245
Bi-Parallel I/F
connector
Control signal
Apple Talk & RS232C I/F BLOCK (Option)
FIFO
IO DATA
LS245
Control Logic
Control sigunal
Flash memory BLOCK
(Japanese version PS standard, EX option)
Address bus
LS139
Control signal
B. Hardware
(1) Specifications
CPU IDT79R3081/54MHz
ASIC IDT79R3710, IDT79R3741
Memory Base ROM
Extended
ROM
(Flash
memory)
DRAM
EEPROM
Emulation PowerPage Level 2/PCL5E
Peripherals Engine I/F (Debug/diag)
(RS232C for command/status and video signal I/F)
Bi-directional parallel I/F (standard, IEEE-P1284)
AppleTalk & RS232C card (External I/O option)
Ethernet card (External I/O option)
Font PS2
PCL5CE
1 LCD (16chars. × 1line)
Operation
Panel
4 LED
8 Switches
13 – 2
AM85C30 26LS31
RS232C
26LS32
I/F connector
MAX232
LocalTalk
I/F connector
Flash Memory
DATA bus
16Mbit x 2
16Mbit x 2
4MB
PCL5E
8MB
PPOS, PS2, Font
Standard 24MB
(8MB + SIMM 16MB)
Extended SIMM 1 slots
(16MB SIMM support)
256Byte (serial type)
35 Type1 font
1 True Type fonts
44 Micro Type fonts
1 bitmap font