STY	Store index Y in memory		STY
Operation: Y → M		N Z C I D V _ _ _ _ _ _
(Ref: 7.3)
Addressing Mode Assembly Language Form OP CODE No. Bytes No. Cycles Zero Page STY Oper 84 2 3 Zero Page, X STY Oper, X 94 2 4 Absolute STY Oper 8C 3 4

TAX	TAX Transfer accumulator to index X		TAX
Operation: A → X		N Z C I D V / / _ _ _ _
(Ref: 7.11)
Addressing Mode Assembly Language Form OP CODE No. Bytes No. Cycles Implied TAX AA 1 2

TAY	TAY Transfer accumulator to index Y		TAY
Operation: A → Y		N Z C I D V / / _ _ _ _
(Ref: 7.13)
Addressing Mode Assembly Language Form OP CODE No. Bytes No. Cycles Implied TAY A8 1 2