1989_MELPS_7700_Software_Manual

Addressing Modes
3. Addressi ng Modes
3.1 Addressing Mode
When executing an instruction, the address of the memory location from which the data required
for arithmetic operation is to be retrieved or to which the result of arithmetic operation is to be
stored must be specified in advance. Address specification is also necessary when the control
is to jump to a certain memory address during program execution. Addressing refers to the
method of specifying the memory address.
The Series MELPS 7700 microcomputers support 28 different addressing modes, offering extremely
versatile and powerful memory accessing capability.
3.2 Explanation of Addressing Modes
Each of the 28 addressing modes is explained on the pages indicated below:
Implied addressing mode
Immediate addressing mode
Accumulator addressing mode
Direct addressing mode
Direct bit addressing mode
Direct indexed X addressing mode
Direct index~d V addressing mode
Direct indirect addressing mode
Direct indexed X indirect addressing mode
Direct indirect indexed V addressing mode
Direct indirect long addressing mode
Direct Indirect long indexed V addressing mode
Absolute addressing mode
Absolute bit addressing mode
Absolute indexed X addressing mode
Absolute Indexed V addressing mode
Absolute long addressing mode
Absolute long indexed X addressing mode
Absolute indirect addressing mode
Absolute indirect long addressing mode
Absolute indexed X indirect addressing mode
Stack addressing mode
Relative addressing mode
Direct bit relative addressing mode
Absolute bit relative addressing mode
Stack pointer relative addressing mode
Stack pointer relative indirect indexed V addressing mode
Block transfer addressing mode
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