def instruction_BVC(self, opcode, ea):
        """
        Tests the state of the V (overflow) bit and causes a branch if it is
        clear. That is, branch if the twos complement result was valid. When
        used after an operation on twos complement binary values, this
        instruction will branch if there was no overflow.

        source code forms: BVC dd; LBVC DDDD

        CC bits "HNZVC": -----
        """
        if self.V == 0:
#            log.info("$%x BVC branch to $%x, because V==0 \t| %s" % (
#                self.program_counter, ea, self.cfg.mem_info.get_shortest(ea)
#            ))
            self.program_counter.set(ea)
Tests the state of the V (overflow) bit and causes a branch if it is
        clear. That is, branch if the twos complement result was valid. When
        used after an operation on twos complement binary values, this
        instruction will branch if there was no overflow.

        source code forms: BVC dd; LBVC DDDD

        CC bits "HNZVC": -----