def instruction_INC_memory(self, opcode, ea, m):
        """
        Adds to the register. The carry bit is not affected, thus allowing this
        instruction to be used as a loop counter in multiple-precision
        computations. When operating on unsigned values, only the BEQ and BNE
        branches can be expected to behave consistently. When operating on twos
        complement values, all signed branches are correctly available.

        source code forms: INC Q; INCA; INCB

        CC bits "HNZVC": -aaa-
        """
        r = self.INC(m)
        return ea, r & 0xff