STM8 addressing modes

• inherent, NOP
• immediate, LD A, #555
• direct, LD A, $55
• indexed, LD A, ($55,X)
• SP indexed, LD A ($55, SP)
• bit operation, BSET byte,#5
• relative, JRNE loop
• indirect, LD A,([$55],X)

Very often we have errors with placing, or not placing hash, because without hash, you are just accessing the memory on address 555

Most of addressing modes can be split in three sub-modes:

• The extended addressing mode ("e") can reach any byte in the 16-Mbyte addressing space, but the instruction size is bigger...
• The long addressing mode ("w") is the most powerful for program management, when the program is executed in the same section
• The short addressing mode ("b") is less powerfull, because it can only access page 0, but the instruction size is more compact

Inherent adderssing instructions

Untitled

Immediate addressing instructions

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Bit operations - for setting flags, registers