code: function or (cpu, n) {
      const r = cpu.a | n;
  
      cpu.f = 0;
      if ((r & 0xff) == 0) cpu.f |= FLAG_Z;
  
      return r;
  }
docs: OR n
  
  Description:
  Logical OR n with register A, result in A.
  
  Use with:
  n = A, B, C, D, E, H, L, (HL), #
  
  Flags affected:
  Z - Set if result is zero.
  N - Reset.
  H - Reset.
  C - Reset.
  
  Opcodes:
  Instruction    Parameters    Opcode    Cycles
  OR             A             B7        4
  OR             B             B0        4
  OR             C             B1        4
  OR             D             B2        4
  OR             E             B3        4
  OR             H             B4        4
  OR             L             B5        4
  OR             (HL)          B6        8
  OR             #             F6        8