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CHAPTER 3 CPU ARCHITECTURE
Preliminary User’s Manual U13420EJ2V0UM00
3.4.7 Based addressing
[Function]
8-bit immediate data is added as offset data to the contents of the base register, that is, the HL register pair
in an instruction word of the register bank specified with the register bank select flag (RBS0 and RBS1) and
the sum is used to address the memory. Addition is performed by expanding the offset data as a positive number
to 16 bits. A carry from the 16th bit is ignored. This addressing can be carried out for all the memory spaces.
[Operand format]
Identifier
Description
—
[HL + byte]
[Description example]
MOV A, [HL + 10H]; when setting byte to 10H
Operation code
1 0 1 0 1 1 1 0
0 0 0 1 0 0 0 0
Содержание mPD780065 Series
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