SED SED Set decimal mode SED N Z C I D V Operation: 1 -> D . . . . 1 . (Ref: 3.3.1) +----------------+-----------------------+---------+---------+----------+ | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles| +----------------+-----------------------+---------+---------+----------+ | Implied | SED | $F8 | 1 | 2 | +----------------+-----------------------+---------+---------+----------+