instructions n -> n n DUP -> Duplicates byte n on the stack DUPw -> Duplicates word n on the stack DUPx -> Copies byte n on the stack to x DUPxw -> Copies word n on the stack to xw DUPy -> Copies byte n on the stack to y DUPyw -> Copies word n on the stack to x and y DUPxy -> Copies byte n on the stack to x and y. DUPxyw -> Copies word n on the stack to xw and yw