instructions n1 n2 -> n1+n2 ADD -> Pushes n1 + n2 (byte) to the stack ADDw -> Pushes n1 + n2 (word) to the stack ADDx -> Pushes n1 + x (byte) to the stack ADDxw -> Pushes n1 + xw (word) to the stack ADDy -> Pushes n1 + y (byte) to the stack ADDyw -> Pushes n1 + yw (word) to the stack ADDxy -> Pushes x + y (byte) to the stack ADDxyw -> Pushes xw + yw (word) to the stack