63
CHAPTER 3 CPU ARCHITECTURE
3.4.6 Register indirect addressing
[Function]
This addressing is to address a memory area to be manipulated by using as an operand address the contents
of a register pair specified by the register bank select flags (RBS0 and RBS1) and the register pair specification
code in the operation code. This addressing can be carried out for all the memory spaces.
[Operand format]
Identifier
Description
—
[DE], [HL]
[Description example]
MOV A, [DE]; when selecting [DE] as register pair
Operation code
1 0 0 0 0 1 0 1
[Operation]
16
0
8
D
7
E
0
7
7 0
A
DE
The contents of the memory
addressed are transferred.
Memory
The memory address
specified with the
register pair DE
Summary of Contents for mPD780973 Series
Page 2: ...2 MEMO ...
Page 66: ...66 MEMO ...
Page 98: ...98 MEMO ...
Page 138: ...138 MEMO ...
Page 164: ...164 MEMO ...
Page 182: ...182 MEMO ...
Page 204: ...204 MEMO ...
Page 244: ...244 MEMO ...
Page 262: ...262 MEMO ...
Page 278: ...278 MEMO ...
Page 290: ...290 MEMO ...