SEI SEI Set interrupt disable status SED N Z C I D V Operation: 1 -> I . . . 1 . . (Ref: 3.2.1) +----------------+-----------------------+---------+---------+----------+ | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles| +----------------+-----------------------+---------+---------+----------+ | Implied | SEI | $78 | 1 | 2 | +----------------+-----------------------+---------+---------+----------+