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Bus Controller (BC)
8-27
Fig. 8-7-2 Space Partitioning
1 GB
Processor mode
System
reserved
2 GB
1 GB
Internal memory space
External memory space
External memory space that is actually assigned as external memory
1 GB
Extension memory mode
System
reserved
2 GB
1 GB
Block0 (64 MB)
There is no portion for
address extension for block 3
Block1 (64 MB)
Block2 (64 MB)
Block3 (64 MB)
8 MB space
Address extension
8 MB space
Block0 (64 MB)
There is no portion for
address extension for block 3
Block1 (64 MB)
Block2 (64 MB)
Block3 (64 MB)
8 MB space
Address extension
x'90000000
x'90800000
x'91000000
x'91800000
x'92000000
x'92800000
x'93000000
x'93800000
x'9C000000
x'9C800000
x'9D000000
x'9D800000
x'9E000000
x'9E800000
x'9F000000
x'9F800000
x'60000000
x'60800000
x'61000000
x'61800000
x'62000000
x'62800000
x'63000000
x'63800000
x'6C000000
x'6C800000
x'6D000000
x'6D800000
x'6E000000
x'6E800000
x'6F000000
x'6F800000
8 MB space
x'00000000
x'FFFFFFFF
x'80000000
x'90000000
x'A0000000
x'B0000000
x'C0000000
x'70000000
x'60000000
x'50000000
x'40000000
x'00000000
x'80000000
x'90000000
x'A0000000
x'B0000000
x'C0000000
x'FFFFFFFF