SEI SEI Set interrupt disable status SEI Operation: 1 -> I N V - B D I Z C . . . . . 1 . . +----------------+-----------------------+---------+---------+----------+ | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles| +----------------+-----------------------+---------+---------+----------+ | Implied | SEI | $78 | 1 | 2 | +----------------+-----------------------+---------+---------+----------+ |