74 - Duplication Operations OP Code (Hexidecimal) Operation1 Description Gas 0x80 DUP1 1 2 Duplicate 1st stack item2 3 0x8f DUP16 16 17 Duplicate 16th stack item 3 References Youtube Reference Tags Instruction Set Footnotes (Mnemonic, Stack items placed, Stack items removed) ↩ DUP2, DUP3..DUP15 duplicate 2nd, 3rd..15th stack item respectively ↩