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APPENDIX
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Register indirect addressing with base index (@RW0 + RW7, @RW1 + RW7)
Memory is accessed using the address determined by adding RW0 or RW1 to the contents of general-
purpose register RW7. Address bits 16 to 23 are indicated by the data bank register (DTB).
Figure B.4-6 Example of Register Indirect Addressing with Base Index (@RW0 + RW7, @RW1 + RW7)
MOVW A, @RW1+RW7 (This instruction reads data by register indirect addressing with
Before execution
After execution
648
a base index and stores it in A.)
A 0 7 1 6
2 5 3 4
RW1 D 3 0 F
+
DTB 7 8
WR7 0 1 0 1
A 2 5 3 4
F F E E
RW1 D 3 0 F
DTB 7 8
WR7 0 1 0 1
Memory space
78D410
E E
H
78D411
F F
H
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