Sharp JX-8200, Руководство по обслуживанию

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External I/O (for Option Board)
Address Peripheral Register
0C000000H Extenal Serial I/O (85C30) Serial Port A Control Register
0C000004H Serial Port A Data Register
0C000008H Serial Port B Control Register
0C00000CH Serial Port B Data Register
0C000010H Serial Board FIFO FIFO Data Register
0C000018H FIFO Status & Reset FIFO Status & Reset Register
09000000H SCSI (reserved) SCSI Interface Control Register
|
0900001CH
0C000000H LAN Card LAN Card Memory Space
|
0C01FFFFH (reserved)
Apple Talk FIFO Register
Address. R/W Port Bit Signal Name Description
0C000018H R 7
6
5
4
3 _W/_REQB Wait/Request Status of 85C30 PortB
2 _HF Half Full Flag of the FIFO
1 _EF Empty Flag of the FIFO
0 _FF Full Flag of the FIFO
0C000018H W 7
6
5
4
3
2
1
0 _FFRESET FIFO Reset (Low reset and return to High)
Flash Memory
This controller supports the Flash Memory that is part of the extended
Flash Memory Board. This memory can be supported file system.
The PowerPage Level 2 interpreter with the 35 Type 1 compatible
font is located in Flash memory area. The following is memory map
for the flash memory.
c. RAM/EEPROM
•
DRAM Total 40MByte max.
access time: under 70 nsec.
•
EEPROM 256Byte serial type (M6M80021 or equivalent)
NVRAM for set up memory
Download
fonts storage
ares
(6MB)
PowerPage L2
(2MB)
1f3ffffc
1ee00000
1ec00000
BANK0
Not supported
SHARP SERVICE MANUAL JX8200SM [13] ELECTRICAL SECTION
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