SMB4         Set bit 4 of indicated address                          SMB4


 4510 Versions:

  Operation:  M(4) <- 1                 N V - B D I Z C
                                        . . . . . . . .

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  |  ZeroPage      |   SMB4 $FF            |   $C7   |    2    |    ?     |
  +----------------+-----------------------+---------+---------+----------+