code: def instruction_BLT(self, opcode, ea):
          
          if (self.N ^ self.V) == 1: # N xor V
  #            log.info("$%x BLT branch to $%x, because N XOR V == 1 \t| %s" % (
  #                self.program_counter, ea, self.cfg.mem_info.get_shortest(ea)
  #            ))
              self.program_counter.set(ea)
docs: Causes a branch if either, but not both, of the N (negative) or V
          (overflow) bits is set. That is, branch if the sign of a valid twos
          complement result is, or would be, negative. When used after a subtract
          or compare operation on twos complement binary values, this instruction
          will branch if the register was less than the memory register.
  
          source code forms: BLT dd; LBLT DDDD
  
          CC bits "HNZVC": -----