Fujitsu Impact 3650 Maintenance Manual page 136

[EEPROM]
The MB90706 has a 16K-bit serial transmission EEPROM (equivalent to the M24C16) that contains setup
information, mechanism information, and consumables information.
If the board is replaced, remove the EEPROM from the board to be replaced and mount it on the replacing board.
[ROM]
The MB90706 uses a "512K x 16 bits" flash ROM for programs.
It also permits another flash ROM to be mounted when needed to support various types of emulation.
A 2-megabyte memory space is defined for each ROM.
A 16-megabit mask ROM is used for the character generator.
Address
000000 to 0000BF
0000C0 to 0000FF
000100 to 00037F
000380 to 5FFFFF
600000 to 7FFFFF
800000 to 9FFFFF
A00000 to BFFFFF
C00000 to DFFFFF
E00000 to EFFFFF
F00000 to FFFFFF
Capacity Explanation
192 bytes CPU internal I/O area
64 bytes External I/O area (for head and motor LSI)
640 bytes CPU internal RAM area
5.9M bytes Reserved
2M bytes Program ROM 1
2M bytes Reserved
2M bytes Character generator ROM3
2M bytes Reserved
1M byte Reserved
512K byte DRAM
Table 5.3.2 Memory map
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