< base register (or M68K_REG_INVALID if irrelevant)
< set to true if the two values below should be used
< displacement value
< indirect base register (or M68K_REG_INVALID if irrelevant)
< indirect displacement
< index register (or M68K_REG_INVALID if irrelevant)
< 0 = w, 1 = l
< used for bf* instructions
< other displacement
< scale for index register
< used for bf* instructions
Instruction's operand referring to memory This is associated with M68K_OP_MEM operand type above