TYS TYA Transfer index Y to stack register TYS Operation: Y -> S N V - B D I Z C . . . . . . . . +----------------+-----------------------+---------+---------+----------+ | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles| +----------------+-----------------------+---------+---------+----------+ | Implied | TYS | $2B | 1 | 1s | +----------------+-----------------------+---------+---------+----------+ s Instruction requires 2 cycles when CPU is run at 1 MHz or 2 MHZ