Register Indirect Addressing - NEC UPD789026 Series User Manual

3.4.5 Register indirect addressing

[Function]
The memory is addressed with the contents of the register pair specified as an operand. The register pair to be
accessed is specified with the register pair specification code in the instruction code. This addressing can be
carried out for all the memory spaces.
[Operand format]
[Example]
MOV A, [DE]; When selecting register pair [DE]
[Illustration]
The contents of addressed
memory are transferred
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CHAPTER 3 CPU ARCHITECTURE
Identifier
−
[DE], [HL]
Instruction Code
15
DE D
7
A
Description
0 0 1 0 1
8 7
E
7
0
User's Manual U11919EJ3V0UM00
0 1 1
0
Memory address specified
0
by register pair DE
67